调整Speak和Microphone音量。判断是否静音

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下列代码是对功能的封装

Mixer.h源码

#pragma once#include "windows.h"#include <mmsystem.h>#pragma comment (lib, "winmm.lib")/*Name:CMixerDesc:调整Speak和Microphone音量。判断是否静音！在 Visual Studio 2008 + SP1 中调试通过。*/class CMixer {public:CMixer();CMixer(const int VolRange);virtual ~CMixer();enum MixerDeice{SPEAKERS=0,WAVEOUT,SYNTHESIZER,MICROPHONE};bool GetMute(MixerDeice dev); //检查设备是否静音bool SetMute(MixerDeice dev,bool vol); //设置设备静音bool SetVolume(MixerDeice dev,long vol); //设置设备的音量unsigned GetVolume(MixerDeice dev); //得到设备的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE INprivate:bool GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc);bool SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume);bool SetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc, bool mute);unsigned GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc);long GetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc);long m_VolRange ;};

Mixer.cpp源码

#include "StdAfx.h"#include "Mixer.h"//////////////////////////////////////////////////////////////////////// Construction/Destruction//////////////////////////////////////////////////////////////////////CMixer::CMixer(){m_VolRange = 100;}CMixer::~CMixer(){}CMixer::CMixer(const int VolRange){m_VolRange = VolRange;}//----------------------------设定音量---------------------------------------bool CMixer::GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc) { MIXERLINECONTROLS mxlc; MIXERLINE mxl; mxl.cbStruct = sizeof(mxl); mxl.dwComponentType = componentType; if(!mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE)) { 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_GETLINECONTROLSF_ONEBYTYPE)) return 0; else return 1; } return 0; } //---------------------------------------------------------------------------long CMixer::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 CMixer::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 CMixer::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 CMixer::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 */CMixer::GetVolume(MixerDeice 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=NULL;switch (dev){case WAVEOUT: device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case SYNTHESIZER: device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case MICROPHONE: // 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; default: device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;}if(mixerOpen(&hmixer, 0, 0, 0, 0)) {OutputDebugString(L"打开Mixer失败！/n");return 0;}if(!GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl)){mixerClose(hmixer);return 0;}rt=GetVolumeValue(hmixer,&volCtrl)*m_VolRange /volCtrl.Bounds.lMaximum;mixerClose(hmixer);return rt;}//---------------------------------------------------------------------------bool /*WINAPI*/ CMixer::SetVolume(MixerDeice 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-m_VolRange 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 - m_VolRange ，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 WAVEOUT: device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case SYNTHESIZER: device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case MICROPHONE: device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量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/m_VolRange ; if(SetVolumeValue(hmixer,&volCtrl,vol))rc=true;}mixerClose(hmixer);return rc;}//---------------------------------------------------------------------------bool /*WINAPI*/ CMixer::SetMute(MixerDeice dev,/*long*/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 WAVEOUT: device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case SYNTHESIZER: device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case MICROPHONE: device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量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 */CMixer::GetMute(MixerDeice 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 WAVEOUT:device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; break;case SYNTHESIZER:device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; break;case MICROPHONE: device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麦克风音量 //device=MIXERLINE_COMPONENTTYPE_DST_WAVEIN; 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;}