void SetMute(bool flag)
{
MIXERCONTROLDETAILS muteCtl = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteVal = new MIXERCONTROLDETAILS_BOOLEAN();
muteVal.Value = flag ? 1 : 0;
Debug.WriteLine("MixerAPI.SetMute:" + flag.ToString());
IntPtr mutePtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN()));
Marshal.StructureToPtr(muteVal, mutePtr, false);
muteCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
muteCtl.ControlID = _muteID;
muteCtl.Channels = 1;
muteCtl.MultipleItems = 0;
muteCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN());
muteCtl.DetailsPointer = mutePtr;
uint mmresult = mixerSetControlDetails(_hMixer, ref muteCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
Marshal.FreeCoTaskMem(mutePtr);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new Exception("mixerSetControlDetails" + mmresult.ToString());
}
}
bool IsMute()
{
MIXERCONTROLDETAILS muteCtl = new MIXERCONTROLDETAILS();
IntPtr mutePtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN()));
muteCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
muteCtl.ControlID = _muteID;
muteCtl.Channels = 1;
muteCtl.MultipleItems = 0;
muteCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN());
muteCtl.DetailsPointer = mutePtr;
uint mmresult = mixerGetControlDetails(_hMixer, ref muteCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
Marshal.FreeCoTaskMem(mutePtr);
throw new MixerException("mixerGetControlDetails", mmresult);
}
MIXERCONTROLDETAILS_BOOLEAN muteInfo
= (MIXERCONTROLDETAILS_BOOLEAN)Marshal.PtrToStructure(mutePtr,
typeof(MIXERCONTROLDETAILS_BOOLEAN));
Marshal.FreeCoTaskMem(mutePtr);
Debug.WriteLine("MixerAPI.IsMuteret:" + muteInfo.Value.ToString());
return(muteInfo.Value > 0);
}
void SetMute(bool flag)
{
MIXERCONTROLDETAILS muteCtl = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteVal = new MIXERCONTROLDETAILS_BOOLEAN();
muteVal.Value = flag ? 1 : 0;
Debug.WriteLine("MixerAPI.SetMute:" + flag.ToString());
IntPtr mutePtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN()));
Marshal.StructureToPtr(muteVal, mutePtr, false);
muteCtl.StructSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS());
muteCtl.ControlID = _muteID;
muteCtl.Channels = 1;
muteCtl.MultipleItems = 0;
muteCtl.DetailsItemSize = (uint)Marshal.SizeOf(new MIXERCONTROLDETAILS_BOOLEAN());
muteCtl.DetailsPointer = mutePtr;
uint mmresult = mixerSetControlDetails(_hMixer, ref muteCtl,
MIXER_OBJECTF.HMIXER, MIXER_GETCONTROLDETAILSF.VALUE);
Marshal.FreeCoTaskMem(mutePtr);
if (mmresult != (uint)MMRESULT.MMSYSERR_NOERROR)
{
throw new Exception("mixerSetControlDetails" + mmresult.ToString());
}
}
public static void Mute(bool mute)
{
// Check if this is vista or XP
if (System.Environment.OSVersion.Version.Major >= 6)
{
EndpointVolume epVol = new EndpointVolume();
epVol.Mute = mute;
epVol.Dispose();
}
else
{
int mixerID = 0;
if (mixerOpen(out mixerID, 0, 0, 0, 0) == MMSYSERR_NOERROR)
{
MIXERLINE line = new MIXERLINE();
line.cbStruct = Marshal.SizeOf(line);
line.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (mixerGetLineInfoA(mixerID, ref line, MIXER_GETLINEINFOF_COMPONENTTYPE) == MMSYSERR_NOERROR)
{
int sizeofMIXERCONTROL = 152;
MIXERCONTROL mixerControl = new MIXERCONTROL();
MIXERLINECONTROLS lineControl = new MIXERLINECONTROLS();
lineControl.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
lineControl.cbStruct = Marshal.SizeOf(lineControl);
lineControl.dwLineID = line.dwLineID;
lineControl.dwControl = MIXERCONTROL_CONTROLTYPE_MUTE;
lineControl.cControls = 1;
lineControl.cbmxctrl = sizeofMIXERCONTROL;
mixerControl.cbStruct = sizeofMIXERCONTROL;
if (mixerGetLineControlsA(mixerID, ref lineControl, MIXER_GETLINECONTROLSF_ONEBYTYPE) == MMSYSERR_NOERROR)
{
mixerControl = (MIXERCONTROL)Marshal.PtrToStructure(lineControl.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS controlDetails = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteValue = new MIXERCONTROLDETAILS_BOOLEAN();
controlDetails.item = 0;
controlDetails.dwControlID = mixerControl.dwControlID;
controlDetails.cbStruct = Marshal.SizeOf(controlDetails);
controlDetails.cbDetails = Marshal.SizeOf(muteValue);
controlDetails.cChannels = 1;
muteValue.dwValue = Convert.ToInt32(mute);
controlDetails.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(muteValue));
Marshal.StructureToPtr(muteValue, controlDetails.paDetails, false);
int rc = mixerSetControlDetails(mixerID, ref controlDetails, MIXER_SETCONTROLDETAILSF_VALUE);
Marshal.FreeCoTaskMem(controlDetails.paDetails);
Marshal.FreeCoTaskMem(lineControl.pamxctrl);
}
}
}
}
}
public static void Mute(bool mute)
{
// Check if this is vista or XP
if (System.Environment.OSVersion.Version.Major >= 6)
{
EndpointVolume epVol = new EndpointVolume();
epVol.Mute = mute;
epVol.Dispose();
}
else
{
int mixerID = 0;
if (mixerOpen(out mixerID, 0, 0, 0, 0) == MMSYSERR_NOERROR)
{
MIXERLINE line = new MIXERLINE();
line.cbStruct = Marshal.SizeOf(line);
line.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
if (mixerGetLineInfoA(mixerID, ref line, MIXER_GETLINEINFOF_COMPONENTTYPE) == MMSYSERR_NOERROR)
{
int sizeofMIXERCONTROL = 152;
MIXERCONTROL mixerControl = new MIXERCONTROL();
MIXERLINECONTROLS lineControl = new MIXERLINECONTROLS();
lineControl.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
lineControl.cbStruct = Marshal.SizeOf(lineControl);
lineControl.dwLineID = line.dwLineID;
lineControl.dwControl = MIXERCONTROL_CONTROLTYPE_MUTE;
lineControl.cControls = 1;
lineControl.cbmxctrl = sizeofMIXERCONTROL;
mixerControl.cbStruct = sizeofMIXERCONTROL;
if (mixerGetLineControlsA(mixerID, ref lineControl, MIXER_GETLINECONTROLSF_ONEBYTYPE) == MMSYSERR_NOERROR)
{
mixerControl = (MIXERCONTROL)Marshal.PtrToStructure(lineControl.pamxctrl, typeof(MIXERCONTROL));
MIXERCONTROLDETAILS controlDetails = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN muteValue = new MIXERCONTROLDETAILS_BOOLEAN();
controlDetails.item = 0;
controlDetails.dwControlID = mixerControl.dwControlID;
controlDetails.cbStruct = Marshal.SizeOf(controlDetails);
controlDetails.cbDetails = Marshal.SizeOf(muteValue);
controlDetails.cChannels = 1;
muteValue.dwValue = Convert.ToInt32(mute);
controlDetails.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(muteValue));
Marshal.StructureToPtr(muteValue, controlDetails.paDetails, false);
int rc = mixerSetControlDetails(mixerID, ref controlDetails, MIXER_SETCONTROLDETAILSF_VALUE);
Marshal.FreeCoTaskMem(controlDetails.paDetails);
Marshal.FreeCoTaskMem(lineControl.pamxctrl);
}
}
}
}
}
protected static bool GetMuteControl(int hmixer, int componentType, int ctrlType, out MIXERCONTROL mxc, out bool vCurrentMute)
{
// This function attempts to obtain a mixer control.
// Returns True if successful.
MIXERLINECONTROLS mxlc = new MIXERLINECONTROLS();
MIXERLINE mxl = new MIXERLINE();
MIXERCONTROLDETAILS pmxcd = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_BOOLEAN du = new MIXERCONTROLDETAILS_BOOLEAN();
mxc = new MIXERCONTROL();
int rc;
bool retValue;
vCurrentMute = false;
mxl.cbStruct = Marshal.SizeOf(mxl);
mxl.dwComponentType = componentType;
rc = mixerGetLineInfoA(hmixer, ref mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
if (MMSYSERR_NOERROR == rc)
{
int sizeofMIXERCONTROL = 152;
int ctrl = Marshal.SizeOf(typeof(MIXERCONTROL));
mxlc.pamxctrl = Marshal.AllocCoTaskMem(sizeofMIXERCONTROL);
mxlc.cbStruct = Marshal.SizeOf(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControl = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeofMIXERCONTROL;
// Allocate a buffer for the control
mxc.cbStruct = sizeofMIXERCONTROL;
// Get the control
rc = mixerGetLineControlsA(hmixer, ref mxlc, MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR == rc)
{
retValue = true;
// Copy the control into the destination structure
mxc = (MIXERCONTROL)Marshal.PtrToStructure(
mxlc.pamxctrl, typeof(MIXERCONTROL));
}
else
{
retValue = false;
}
int sizeofMIXERCONTROLDETAILS = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS));
int sizeofMIXERCONTROLDETAILS_BOOLEAN = Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_BOOLEAN));
pmxcd.cbStruct = sizeofMIXERCONTROLDETAILS;
pmxcd.dwControlID = mxc.dwControlID;
pmxcd.paDetails = Marshal.AllocCoTaskMem(sizeofMIXERCONTROLDETAILS_BOOLEAN);
pmxcd.cChannels = 1;
pmxcd.item = 0;
pmxcd.cbDetails = sizeofMIXERCONTROLDETAILS_BOOLEAN;
rc = mixerGetControlDetailsA(hmixer, ref pmxcd, MIXER_GETCONTROLDETAILSF_VALUE);
du = (MIXERCONTROLDETAILS_BOOLEAN)Marshal.PtrToStructure(pmxcd.paDetails, typeof(MIXERCONTROLDETAILS_BOOLEAN));
vCurrentMute = (du.fValue != 0);
return(retValue);
}
retValue = false;
return(retValue);
}
