volumebase.h

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#ifndef VOLUME_BASE_H
#define VOLUME_BASE_H
 
#include "libmyth/mythexp.h"
 
enum MuteState {
    kMuteOff = 0,
    kMuteLeft,
    kMuteRight,
    kMuteAll,
};
 
class MPUBLIC VolumeBase
{
  public:
    VolumeBase();
    virtual ~VolumeBase() = default;
 
    void SWVolume(bool set);
    bool SWVolume(void) const;
    virtual uint GetCurrentVolume(void) const;
    virtual void SetCurrentVolume(int value);
    virtual void AdjustCurrentVolume(int change);
    virtual void ToggleMute(void);
 
    virtual MuteState GetMuteState(void) const;
    virtual MuteState SetMuteState(MuteState /*mstate*/);
 
    static MuteState NextMuteState(MuteState /*cur*/);
 
  protected:
 
    virtual int GetVolumeChannel(int channel) const = 0; // Returns 0-100
    virtual void SetVolumeChannel(int channel, int volume) = 0; // range 0-100 for vol
    virtual void SetSWVolume(int new_volume, bool save) = 0;
    virtual int GetSWVolume(void) = 0;
 
    void UpdateVolume(void);
    void SyncVolume(void);
    void SetChannels(int new_channels);
    bool      m_internalVol        {false};
 
 private:
 
    int       m_volume             {80};
    MuteState m_currentMuteState   {kMuteOff};
    bool      m_swvol              {false};
    bool      m_swvolSetting       {false};
    int       m_channels           {0};
 
};
 
#endif // VOLUME_BASE_H