[wdmaudiodev] Re: Turn System Sounds On/Off
- From: "jerry_wang" <jerry_wang@xxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 21 Apr 2004 10:31:01 +0800
hi, Sam
Maybe I can help you.
before tow years,i wrote the function as following:
BOOL CompleteMuteFunction(BOOL bGetStatus,BOOL *pbStatus,BOOL bState)
//bGetStatus : whether return the Mixer Status
//pbStatus,if bGetStatus == TRUE,then return Mixer Status on the pointer
//bState, if bState== TRUE,only return current Status, otherwise reset the
Status
{
HMIXER Mutehmx;
MMRESULT mmresult;
MIXERCAPS mxcaps;
MIXERLINE mxl;
MIXERLINECONTROLS mxlc;
MIXERCONTROL mxc;
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_BOOLEAN mxcdb;
mmresult = mixerOpen(&Mutehmx,0,(DWORD)hWndMain,0,MIXER_OBJECTF_MIXER);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mmresult = mixerGetDevCaps(0,&mxcaps,sizeof(MIXERCAPS));
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
memset((LPVOID)(&mxl),0,sizeof(MIXERLINE));
mxl.cbStruct = sizeof(MIXERLINE);
mxl.dwDestination = 0;
mmresult =
mixerGetLineInfo((HMIXEROBJ)Mutehmx,&mxl,MIXER_GETLINEINFOF_DESTINATION);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mxlc.cbStruct = sizeof(MIXERLINECONTROLS);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
mxlc.cControls = mxl.cControls;
mxlc.cbmxctrl = sizeof (MIXERCONTROL);
mxlc.pamxctrl = &mxc;
mmresult = mixerGetLineControls((HMIXEROBJ)Mutehmx, &mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = mxc.dwControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = mxc.cMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mxcd.paDetails = &mxcdb;
mmresult =
mixerGetControlDetails((HMIXEROBJ)Mutehmx,&mxcd,MIXER_GETCONTROLDETAILSF_VAL
UE);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
Mutehmx=NULL;
return FALSE;
}
if(bState==TRUE)
{
*pbStatus=!mxcdb.fValue;
mixerClose(Mutehmx);
Mutehmx=NULL;
}
else
{
if(pbStatus!=NULL) //得到Mute状态,pbStatus用于控制
{
*pbStatus=mxcdb.fValue;
}
if(bGetStatus)
{
mixerClose(Mutehmx);
Mutehmx=NULL;
return TRUE;
}
mxcdb.fValue = !mxcdb.fValue;
mmresult =
mixerSetControlDetails((HMIXEROBJ)Mutehmx,&mxcd,MIXER_GETCONTROLDETAILSF_VAL
UE);
mixerClose(Mutehmx);
Mutehmx=NULL;
if(pbStatus!=NULL)
*pbStatus=!(*pbStatus);
}
return TRUE;
}
and another function as following:
BOOL ControlVolume(int nVolume,BOOL bGetVolume,DWORD *pdwCurrentVolume)
//nVolume,inc or dec Volume( 1 or -1 )
//bGetVolume,whether return the volume
//if bGetVolume == TRUE, return volume on the pointer
{
UINT mixerID = 0,nUnit;
MMRESULT mmresult;
HMIXER Mutehmx;
MIXERCAPS mxcaps;
MIXERLINE mxl;
MIXERLINECONTROLS mxlc;
MIXERCONTROL mxc;
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED mxcdu;
mmresult = mixerOpen(&Mutehmx,mixerID,0,0,MIXER_OBJECTF_MIXER);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mmresult = mixerGetDevCaps(mixerID,&mxcaps,sizeof(MIXERCAPS));
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mxl.cbStruct = sizeof(MIXERLINE);
mxl.dwDestination = 0;//only get the first
mxl.dwSource = 0;
// mxl.dwComponentType=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
mmresult =
mixerGetLineInfo((HMIXEROBJ)Mutehmx,&mxl,MIXER_GETLINEINFOF_DESTINATION);//M
IXER_GETLINEINFOF_COMPONENTTYPE
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
mxlc.cbStruct = sizeof(MIXERLINECONTROLS);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
mxlc.cControls = mxl.cControls;
mxlc.cbmxctrl = sizeof (MIXERCONTROL);
mxlc.pamxctrl = &mxc;
mmresult = mixerGetLineControls((HMIXEROBJ)Mutehmx, &mxlc,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
//get volume
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = mxc.dwControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = mxc.cMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
mxcd.paDetails = &mxcdu;
mmresult =
mixerGetControlDetails((HMIXEROBJ)Mutehmx,&mxcd,MIXER_GETCONTROLDETAILSF_VAL
UE);
if (MMSYSERR_NOERROR != mmresult)
{
mixerClose(Mutehmx);
return FALSE;
}
//now set volume
DWORD dwMin = mxc.Bounds.dwMinimum;
DWORD dwMax = mxc.Bounds.dwMaximum;
nUnit=(dwMax-dwMin)/MAX_VOLUME;
if(bGetVolume)
{
mixerClose(Mutehmx);
if(pdwCurrentVolume!=NULL)
*pdwCurrentVolume=mxcdu.dwValue/nUnit;
return TRUE;
}
if(nVolume==0)
mxcdu.dwValue =dwMin;
else {
nVolume=(INT)(nUnit*nVolume);
mxcdu.dwValue +=nVolume;
if(mxcdu.dwValue>dwMax)
if(nVolume<0)
mxcdu.dwValue = dwMin;
else mxcdu.dwValue=dwMax;
}
if(pdwCurrentVolume!=NULL)
*pdwCurrentVolume=mxcdu.dwValue/nUnit;
mmresult =
mixerSetControlDetails((HMIXEROBJ)Mutehmx,&mxcd,MIXER_GETCONTROLDETAILSF_VAL
UE);
mixerClose(Mutehmx);
return TRUE;
}
I hope that these code can help you .
Jerry
from beijing of P.R.China
2004.4.21
----- Original Message -----
From: "Sam Tertzakian" <thatsamiam@xxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Monday, April 19, 2004 8:29 PM
Subject: [wdmaudiodev] Turn System Sounds On/Off
> Hi,
>
> I need to write a routine that runs in user mode that allows me to turn
> System Sounds on or off in 98SE, 2000 and XP. Does anybody know the best
> way to do this?
>
> Thank you for your suggestions.
>
> _________________________________________________________________
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