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#include <iostream>
#include <windows.h>
#pragma comment(lib,"Winmm")
class Mixer
{
public:
/*************************************************************************/
bool init()
{
_nNumMixers = mixerGetNumDevs();
_hMixer = NULL;
ZeroMemory(&_mxcaps, sizeof(MIXERCAPS));
if(_nNumMixers != 0)
{
if (mixerOpen(&_hMixer, 0, 0, NULL, MIXER_OBJECTF_MIXER) != MMSYSERR_NOERROR)
{
return FALSE;
}
if (mixerGetDevCaps((UINT)_hMixer, &_mxcaps, sizeof(MIXERCAPS)) != MMSYSERR_NOERROR)
{
return FALSE;
}
}
return _hMixer != NULL;
}
/*************************************************************************/
bool close()
{
return mixerClose(_hMixer) == MMSYSERR_NOERROR;
}
/*************************************************************************/
bool GetMuteControl()
{
MIXERLINE mixerLine;
mixerLine.cbStruct = sizeof(MIXERLINE);
mixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (mixerGetLineInfo((HMIXEROBJ)_hMixer,
&mixerLine,
MIXER_OBJECTF_HMIXER |
MIXER_GETLINEINFOF_COMPONENTTYPE) != MMSYSERR_NOERROR)
{
return FALSE;
}
MIXERCONTROL mixerControl;
MIXERLINECONTROLS mixerLineControl;
mixerLineControl.cbStruct = sizeof(MIXERLINECONTROLS);
mixerLineControl.dwLineID = mixerLine.dwLineID;
mixerLineControl.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
mixerLineControl.cControls = 1;
mixerLineControl.cbmxctrl = sizeof(MIXERCONTROL);
mixerLineControl.pamxctrl = &mixerControl;
if (mixerGetLineControls((HMIXEROBJ)_hMixer,
&mixerLineControl,
MIXER_OBJECTF_HMIXER |
MIXER_GETLINECONTROLSF_ONEBYTYPE) != MMSYSERR_NOERROR)
{
return FALSE;
}
_controlID = mixerControl.dwControlID;
return TRUE;
}
/*************************************************************************/
bool GetMuteValue(LONG* value)
{
MIXERCONTROLDETAILS_BOOLEAN mxcdMute;
MIXERCONTROLDETAILS mixerControlDetails;
mixerControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
mixerControlDetails.dwControlID = _controlID;
mixerControlDetails.cChannels = 1;
mixerControlDetails.cMultipleItems = 0;
mixerControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mixerControlDetails.paDetails = &mxcdMute;
if (mixerGetControlDetails((HMIXEROBJ)_hMixer,
&mixerControlDetails,
MIXER_OBJECTF_HMIXER
| MIXER_GETCONTROLDETAILSF_VALUE) != MMSYSERR_NOERROR)
{
return FALSE;
}
*value = mxcdMute.fValue;
return TRUE;
}
/*************************************************************************/
bool SetMute( bool state)
{
MIXERCONTROLDETAILS_BOOLEAN mxcdMute = { (LONG) state };
MIXERCONTROLDETAILS mixerControlDetails;
mixerControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
mixerControlDetails.dwControlID = _controlID;
mixerControlDetails.cChannels = 1;
mixerControlDetails.cMultipleItems = 0;
mixerControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mixerControlDetails.paDetails = &mxcdMute;
if (mixerSetControlDetails((HMIXEROBJ)_hMixer,
&mixerControlDetails,
MIXER_OBJECTF_HMIXER
| MIXER_SETCONTROLDETAILSF_VALUE) != MMSYSERR_NOERROR)
{
return FALSE;
}
return TRUE;
}
private:
/*************************************************************************/
UINT _nNumMixers;
HMIXER _hMixer;
MIXERCAPS _mxcaps;
DWORD _controlID;
};
/*****************************************************************************\
\*****************************************************************************/
int main(int argc, char* argv[])
{
Mixer mixer;
if( mixer.init() && mixer.GetMuteControl() )
{
LONG currValue;
mixer.GetMuteValue(&currValue);
std::cout << "Mute state:" << currValue << std::endl;
mixer.SetMute(true);
mixer.GetMuteValue(&currValue);
std::cout << "Mute state:" << currValue << std::endl;
mixer.SetMute(false);
mixer.GetMuteValue(&currValue);
std::cout << "Mute state:" << currValue << std::endl;
mixer.close();
}
return 0;
}
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