AlsaMixer.app/AMixer/AMixer.h

   1 // AMixer.h
   2 //
   3 // Copyright (C) 2004, Petr Hlavka
   4 //
   5 // SPDX-License-Identifier: GPL-2.0+
   6
   7 #ifndef AMIXER_H
   8 #define AMIXER_H
   9
  10 #include "AItem.h"
  11
  12 #include <alsa/asoundlib.h>
  13
  14 #define MIXER_ITEMS     3
  15
  16
  17 class AItem;
  18
  19 class AMixer {
  20   private:
  21     snd_mixer_t *mixerHandle;
  22     AItem *mixerItems[MIXER_ITEMS];
  23     char *cardName;
  24
  25     void error(const char *errorString, int errorCode);
  26
  27   public:
  28     AMixer(const char *card);           // ctor
  29     ~AMixer();                          // dtor
  30
  31     bool opened();
  32     void handleEvents();
  33     AItem *attachItem(unsigned int itemNumber, const char *itemName);
  34     bool itemOK(unsigned int itemNumber);
  35     int itemGetVolume(unsigned int itemNumber);
  36     void itemSetVolume(unsigned int itemNumber, unsigned int volume);
  37     int itemIsMuted(unsigned int itemNumber);
  38     void itemToggleMute(unsigned int itemNumber);
  39     void reInit();
  40
  41     static bool mixerElemsChanged();
  42     static bool mixerChanged();
  43     static char* convertIDToCard(const char* cardId);
  44 };
  45
  46 #endif