src/bin/desklink/MixerControl.h

   1 /*
   2  * Copyright 2003-2013, Haiku, Inc.
   3  * Distributed under the terms of the MIT license.
   4  *
   5  * Authors:
   6  *              Jérôme Duval
   7  *              François Revol
   8  *              Puck Meerburg, puck@puckipedia.nl
   9  */
  10 #ifndef MIXER_CONTROL_H
  11 #define MIXER_CONTROL_H
  12
  13
  14 #include <MediaRoster.h>
  15
  16 class BContinuousParameter;
  17 class BParameter;
  18 class BParameterWeb;
  19
  20 // The volume which choices
  21 #define VOLUME_USE_MIXER                0 // default
  22 #define VOLUME_USE_PHYS_OUTPUT  1
  23
  24
  25 class MixerControl {
  26 public:
  27                                                         MixerControl(int32 volumeWhich = VOLUME_USE_MIXER);
  28                                                         ~MixerControl();
  29
  30                         bool                    Connect(int32 volumeWhich, float* _value = NULL,
  31                                                                 const char** _error = NULL);
  32                         bool                    Connected();
  33
  34                         int32                   VolumeWhich() const;
  35                         float                   Volume() const;
  36
  37                         void                    SetVolume(float volume);
  38                         void                    ChangeVolumeBy(float value);
  39
  40                         void                    SetMute(bool muted);
  41                         bool                    Mute();
  42
  43                         float                   Minimum() const { return fMin; }
  44                         float                   Maximum() const { return fMax; }
  45
  46                         media_node              GainNode() { return fGainMediaNode; }
  47
  48 private:
  49                         void                    _Disconnect();
  50
  51                         int32                   fVolumeWhich;
  52                         media_node              fGainMediaNode;
  53                         BParameterWeb*  fParameterWeb;
  54                         BContinuousParameter* fMixerParameter;
  55                         BParameter*             fMuteParameter;
  56                         float                   fMin;
  57                         float                   fMax;
  58                         float                   fStep;
  59 };
  60
  61 #endif  // MIXER_CONTROL_H