VC调节系统音量代码
**
VC调节系统音量代码
mark as [lconductor_001]
使用IAudioEndpointVolume控制SPeakers的方式需要win7的支持，如果用于XP系统的音量控制，可使用混音器MIXER 。
1、IAudioEndpointVolume方式
http://msdn.microsoft.com/en-us/library/dd370839(v=VS.85).aspx
**
#include "StdAfx.h"
#include "SysVolumnCtrl.h"
#include "Audioclient.h"
#include "endpointvolume.h"
#include "mmdeviceapi.h"
#include "audiopolicy.h"
CSysVolumnCtrl::CSysVolumnCtrl(void)
{
CoInitialize(NULL);
}
CSysVolumnCtrl::~CSysVolumnCtrl(void)
{
CoUninitialize();
}
long CSysVolumnCtrl::GetVolumeScalar(float& fLevel)
{
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDevice *pDevice = NULL;
HRESULT _hrStatus = S_OK;
IAudioEndpointVolume *endpointVolume = NULL;
do
{
_hrStatus = CoCreateInstance(__uuidof(MMDeviceEnumerator),
NULL, CLSCTX_INPROC_SERVER,
__uuidof(IMMDeviceEnumerator),
(void**)&pEnumerator);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = pEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia,&pDevice);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = pDevice->Activate(__uuidof(IAudioEndpointVolume),
CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = endpointVolume->GetMasterVolumeLevelScalar(&fLevel);
} while (0);
if (NULL != endpointVolume)
{
endpointVolume->Release();
}
if (NULL != pDevice)
{
pDevice->Release();
}
if (NULL != pEnumerator)
{
pEnumerator->Release();
}
return _hrStatus;
}
long CSysVolumnCtrl::SetVolumeScalar(float fLevel)
{
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDevice *pDevice = NULL;
HRESULT _hrStatus = S_OK;
IAudioEndpointVolume *endpointVolume = NULL;
do
{
_hrStatus = CoCreateInstance(__uuidof(MMDeviceEnumerator),
NULL, CLSCTX_INPROC_SERVER,
__uuidof(IMMDeviceEnumerator),
(void**)&pEnumerator);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = pEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia,&pDevice);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = pDevice->Activate(__uuidof(IAudioEndpointVolume),
CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
if (S_OK != _hrStatus)
{
break;
}
_hrStatus = endpointVolume->SetMasterVolumeLevelScalar(fLevel, NULL);
} while (0);
if (NULL != endpointVolume)
{
endpointVolume->Release();
}
if (NULL != pDevice)
{
pDevice->Release();
}
if (NULL != pEnumerator)
{
pEnumerator->Release();
}
return _hrStatus;
}
整理摘自 http://blog.csdn.net/mengzhishen/article/details/8281726
2、 混音器MIXER 控制 XP 音量
// SysVolumeControl.cpp: implementation of the CSysVolumeControl class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "e.h"
#include "SysVolumeControl.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CSysVolumeControl::CSysVolumeControl()
{
}
CSysVolumeControl::~CSysVolumeControl()
{
}
bool CSysVolumeControl::GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc)
{
MIXERLINECONTROLS mxlc;
MIXERLINE mxl;
mxl.cbStruct = sizeof(mxl);
mxl.dwComponentType = componentType;
MMRESULT mmResult = mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, /*MIXER_OBJECTF_HMIXER |*/MIXER_GETLINEINFOF_COMPONENTTYPE);
if(!mmResult)
{
mxlc.cbStruct = sizeof(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl = mxc;
if(mixerGetLineControls((HMIXEROBJ)hmixer,&mxlc,/*MIXER_OBJECTF_HMIXER |*/MIXER_GETLINECONTROLSF_ONEBYTYPE))
return 0;
else
return 1;
}
return 0;
}
//---------------------------------------------------------------------------
long CSysVolumeControl::GetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_BOOLEAN mxcdMute;
mxcd.hwndOwner = 0;
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbDetails = sizeof(mxcdMute);
mxcd.paDetails = &mxcdMute;
mxcd.cChannels = 1;
mxcd.cMultipleItems = 0;
if (mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd,MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
return -1;
return mxcdMute.fValue;
}
//---------------------------------------------------------------------------
unsigned CSysVolumeControl::GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol; vol.dwValue=0;
mxcd.hwndOwner = 0;
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
return -1;
return vol.dwValue;
}
//---------------------------------------------------------------------------
bool CSysVolumeControl::SetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc, bool mute)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_BOOLEAN mxcdMute;mxcdMute.fValue=mute;
mxcd.hwndOwner = 0;
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbStruct = sizeof(mxcd);
mxcd.cbDetails = sizeof(mxcdMute);
mxcd.paDetails = &mxcdMute;
mxcd.cChannels = 1;
mxcd.cMultipleItems = 0;
if (mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
return 0;
return 1;
}
//---------------------------------------------------------------------------
bool CSysVolumeControl::SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol;vol.dwValue = volume;
mxcd.hwndOwner = 0;
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbStruct = sizeof(mxcd);
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
return 0;
return 1;
}
//---------------------------------------------------------------------------
unsigned WINAPI CSysVolumeControl::GetVolume(int dev)//得到设备的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE IN
{
long device;unsigned rt=0;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
// device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break; // cd 音量
// device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量
// device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 扬声器音量
device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;
case 4:
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;break;
default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}
UINT iNumDevs = mixerGetNumDevs();
if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(!GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
return 0;
rt=GetVolumeValue(hmixer,&volCtrl)*100/volCtrl.Bounds.lMaximum;
mixerClose(hmixer);
return rt;
}
//---------------------------------------------------------------------------
bool WINAPI CSysVolumeControl::SetVolume(long dev,long vol)//设置设备的音量
{
// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN
// vol=0-100 表示音量的大小 , 设置与返回音量的值用的是百分比，即音量从0 - 100，而不是设备的绝对值
// retrun false 表示设置音量的大小的操作不成功
// retrun true 表示设置音量的大小的操作成功
long device;
bool rc=false;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;
case 4:
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;break;
default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}
if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
{
vol=vol*volCtrl.Bounds.lMaximum/100;
if(SetVolumeValue(hmixer,&volCtrl,vol))
rc=true;
}
mixerClose(hmixer);
return rc;
}
//---------------------------------------------------------------------------
bool WINAPI CSysVolumeControl::SetMute(long dev,bool vol)//设置设备静音
{
// dev =0,1,2 分别表示主音量,波形,MIDI ,LINE IN
// vol=0,1 分别表示取消静音,设置静音
// retrun false 表示取消或设置静音操作不成功
// retrun true 表示取消或设置静音操作成功
long device;
bool rc=false;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;
case 4:
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;break;
default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}
if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_MUTE,&volCtrl))
if(SetMuteValue(hmixer,&volCtrl,(bool)vol))
rc=true;
mixerClose(hmixer);
return rc;
}
//---------------------------------------------------------------------------
bool WINAPI CSysVolumeControl::GetMute(long dev)//检查设备是否静音
{
//dev =0,1,2 分别表示主音量，波形,MIDI ,LINE IN
// retrun false 表示没有静音
// retrun true 表示静音
long device;
bool rc=false;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
{
case 1:
device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;
case 2:
device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;
case 3:
device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;
case 4:
device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE;break;
default:
device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
}
if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_MUTE,&volCtrl))
rc=GetMuteValue(hmixer,&volCtrl);
mixerClose(hmixer);
return rc;
}
参考 https://www.xuebuyuan.com/2051646.html