一個利用windows api控制放音音量和錄音麥克風音量實現類（c++程式碼）

1、標頭檔案（Mixer.h）

// Mixer.h: interface for the CMixer class. // ////////////////////////////////////////////////////////////////////// #if !defined(AFX_MIXER_H__7369BAA5_012E_467E_AD1E_A383E4474C58__INCLUDED_) #define AFX_MIXER_H__7369BAA5_012E_467E_AD1E_A383E4474C58__INCLUDED_ #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers #include "windows.h" #include <mmsystem.h> #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 class CMixer { public: CMixer(); CMixer(const int VolRange); virtual ~CMixer(); enum MixerDeice{ SPEAKERS=0, WAVEOUT, SYNTHESIZER, MICROPHONE }; bool GetMute(MixerDeice dev); //檢查裝置是否靜音 bool SetMute(MixerDeice dev,bool vol); //設定裝置靜音 bool SetVolume(MixerDeice dev,long vol); //設定裝置的音量 unsigned GetVolume(MixerDeice dev); //得到裝置的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE IN private: 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 ; }; #endif // !defined(AFX_MIXER_H__7369BAA5_012E_467E_AD1E_A383E4474C58__INCLUDED_)

2、cpp檔案（Mixer.cpp）

// Mixer.cpp: implementation of the CMixer class. // //#include "stdwx.h" #include "Mixer.h" ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// CMixer::CMixer() { m_VolRange = 100; } CMixer::~CMixer() { } CMixer::CMixer(const int VolRange) { m_VolRange = VolRange; } //----------------------------設定音量--------------------------------------- bool CMixer::GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc) { MIXERLINECONTROLS mxlc; MIXERLINE mxl; bool exist = false; mxl.cbStruct = sizeof(mxl); mxl.dwComponentType = componentType; if (componentType == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE) {//獲取錄音麥克風裝置 mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN; // 得到錄製匯流排中的連線數 mixerGetLineInfo( (HMIXEROBJ)hmixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_COMPONENTTYPE ); // 將連線數儲存 DWORD dwConnections = mxl.cConnections; // 準備獲取麥克風裝置的ID DWORD dwLineID = 0; for ( DWORD i = 0; i < dwConnections; i++ ) { // 列舉每一個裝置，當Source的ID等於當前的迭代記數 mxl.dwSource = i; // 根據SourceID獲得連線的資訊 MMRESULT mr = mixerGetLineInfo( (HMIXEROBJ)hmixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_SOURCE ); // 判斷函式執行錯誤 if ( mr != 0 ) { break; } // 如果當前裝置型別是麥克風，則跳出迴圈。 if ( mxl.dwComponentType == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE ) { exist = true; break; } } }else if(!mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE)) { exist = true; } if (exist) { 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)//得到裝置的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE IN { long device; unsigned rt=0; MIXERCONTROL volCtrl; HMIXER hmixer; switch (dev) { case 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; //麥克風音量 // device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 揚聲器音量 //device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break; default: device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS; } if(mixerOpen(&hmixer, 0, 0, 0, 0)) 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)//設定裝置的音量 { // dev =0,1,2 分別表示主音量,波形,MIDI ,LINE IN // vol=0-m_VolRange 表示音量的大小 , 設定與返回音量的值用的是百分比，即音量從0 - m_VolRange ，而不是裝置的絕對值 // retrun false 表示設定音量的大小的操作不成功 // retrun true 表示設定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_COMPACTDISC; break; // cd 音量 device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麥克風音量 // device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 揚聲器音量 //device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; 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/m_VolRange ; if(SetVolumeValue(hmixer,&volCtrl,vol)) rc=true; } mixerClose(hmixer); return rc; } //--------------------------------------------------------------------------- bool /*WINAPI*/ CMixer::SetMute(MixerDeice dev,/*long*/bool vol)//設定裝置靜音 { // dev =0,1,2 分別表示主音量,波形,MIDI ,LINE IN // vol=0,1 分別表示取消靜音,設定靜音 // retrun false 表示取消或設定靜音操作不成功 // retrun true 表示取消或設定靜音操作成功 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_COMPACTDISC; break; // cd 音量 device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麥克風音量 // device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 揚聲器音量 //device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; 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 */CMixer::GetMute(MixerDeice dev)//檢查裝置是否靜音 { //dev =0,1,2 分別表示主音量，波形,MIDI ,LINE IN // retrun false 表示沒有靜音 // retrun true 表示靜音 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_COMPACTDISC; break; // cd 音量 //device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break; //麥克風音量 // device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break; //PC 揚聲器音量 //device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break; 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; }