audsolaris.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: audSolaris.h,v 1.2.8.1 2004/07/09 02:02:00 hubbe Exp $
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#ifndef _AUDSOLAR
#define _AUDSOLAR

//-----------------------------------------------
// System includes.
//-----------------------------------------------
#include <sys/audioio.h>

//------------------------------------------------
// local includes
//------------------------------------------------
#include "hxcom.h"
#include "hxslist.h"
#include "audUnix.h"


class CAudioOutSolaris : public CAudioOutUNIX
{
  public:
    CAudioOutSolaris();
    virtual ~CAudioOutSolaris();

  protected:


    
    //-------------------------------------------------------
    //
    // Pure virtuals from CAudioOutUNIX.
    //
    //-------------------------------------------------------
    virtual INT16 _Imp_GetAudioFd(void);

    //This ones important.
    virtual UINT64 _GetBytesActualyPlayed(void) const;

    //Devic specific method to set the audio device characteristics. Sample rate,
    //bits-per-sample, etc.
    //Method *must* set member vars. m_unSampleRate and m_unNumChannels.
    virtual HX_RESULT _SetDeviceConfig( const HXAudioFormat* pFormat );

    //Device specific method to test whether or not the device supports the
    //give sample rate. If the device can not be opened, or otherwise tested,
    //it should return RA_AOE_DEVBUSY.
    virtual HX_RESULT _CheckSampleRate( ULONG32 ulSampleRate );
    virtual HX_RESULT _CheckFormat( const HXAudioFormat* pFormat );

    //Device specific method to write bytes out to the audiodevice and return a
    //count of bytes written. 
    virtual HX_RESULT _WriteBytes( UCHAR* buffer, ULONG32 ulBuffLength, LONG32& lCount );

    //Device specific methods to open/close the mixer and audio devices.
    virtual HX_RESULT _OpenAudio();
    virtual HX_RESULT _CloseAudio();
    virtual HX_RESULT _OpenMixer();
    virtual HX_RESULT _CloseMixer();

    //Device specific method to reset device and return it to a state that it 
    //can accept new sample rates, num channels, etc.
    virtual HX_RESULT _Reset();

    //Device specific method to get/set the devices current volume.
    virtual UINT16    _GetVolume() const;
    virtual HX_RESULT _SetVolume(UINT16 volume);

    //Device specific method to drain a device. This should play the remaining
    //bytes in the devices buffer and then return.
    virtual HX_RESULT _Drain();

    //Device specific methods to Pause/Resume the device. If a device can't handle
    //the pause/resume in hardware then it must return RA_AOE_NOTSUPPORTED, the
    //default. In this case we use a 'rollback' method.
    virtual HX_RESULT _Pause();
    virtual HX_RESULT _Resume();

    //Device specific method to return the amount of room available on the
    //audio device that can be written without blocking.
    virtual HX_RESULT _GetRoomOnDevice( ULONG32& ulBytes) const;

    BOOL _IsSelectable() const;
    BOOL _HardwarePauseSupported() const;
    
  private:

    //We use this to break up the write into smaller chunks inserting
    //EOFs into the stream.
    ULONG32 _WriteWithEOF( UCHAR* buffer, ULONG32 bufflen );
    
    //protect the unintentional copy ctor.
    CAudioOutSolaris( const CAudioOutSolaris& );  //Not implemented.

    //We break up each write of m_wBlockSize into this many chunks. We
    //count the chunks with the EOF write markers. Yummy.
    const int m_nBlockDivisions;

    int m_nDevID;
    int m_nMixerID;
};


#endif 	//_AUDSOLAR