xp和Vista系统获取设置主音量静音和音量大小区别

#include <mmdeviceapi.h>

#include <endpointvolume.h>

#include <mmsystem.h>

#pragma comment(lib, "winmm.lib")

 

以下程序为：如果系统处于静音状态 则打开系统音量：

//Windows 系统音量设置

 IMMDevice *device = NULL;

 HRESULT hr = CoInitialize(NULL);

 if (FAILED(hr))

 {

  return FALSE;

 }

 IMMDeviceEnumerator *deviceEnumerator = NULL;

 hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER,

  __uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);

 if (FAILED(hr))

 {

  // xp 系统调节音量

  HMIXER hMixer;

  MIXERLINE mixerline;

  MIXERLINECONTROLS mlcs;

  MIXERCONTROL mc;

  MIXERCONTROLDETAILS_BOOLEAN mcdMute;

  MIXERCONTROLDETAILS mcd;

  LONG lvalue;

  try{

   if (MMSYSERR_NOERROR == mixerOpen(&hMixer, 0, 0, 0, 0))

   {

    RtlZeroMemory(&mixerline, sizeof(MIXERLINE));

    mixerline.cbStruct = sizeof(MIXERLINE);

    mixerline.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;

    if (MMSYSERR_NOERROR == mixerGetLineInfo((HMIXEROBJ)hMixer, &mixerline, MIXER_GETLINEINFOF_COMPONENTTYPE))

    {

     RtlZeroMemory(&mlcs, sizeof(MIXERLINECONTROLS));

     mlcs.cbStruct = sizeof(MIXERLINECONTROLS);

     mlcs.dwLineID = mixerline.dwLineID;

     mlcs.dwControlType =  MIXERCONTROL_CONTROLTYPE_MUTE;

     mlcs.cControls = 1;

     mlcs.cbmxctrl = sizeof(MIXERCONTROL);

     mlcs.pamxctrl = & mc;

     if (MMSYSERR_NOERROR == mixerGetLineControls((HMIXEROBJ)hMixer, &mlcs, MIXER_GETLINECONTROLSF_ONEBYTYPE))

     {

      RtlZeroMemory(&mcd, sizeof(MIXERCONTROLDETAILS));

      mcd.cbStruct = sizeof(MIXERCONTROLDETAILS);

      mcd.dwControlID = mc.dwControlID;

      mcd.cChannels = 1;

      mcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);

      mcd.paDetails = &mcdMute;

      if (MMSYSERR_NOERROR == mixerGetControlDetails((HMIXEROBJ)hMixer, &mcd, MIXER_GETCONTROLDETAILSF_VALUE))

      {

       lvalue = mcdMute.fValue;

       if (lvalue != 0 )

       {

        RtlZeroMemory(&mcd, sizeof(MIXERCONTROLDETAILS));

        mcdMute.fValue = FALSE;       //静音设置，0非静音，1静音

        mcd.cbStruct = sizeof(MIXERCONTROLDETAILS);

        mcd.dwControlID = mc.dwControlID;

        mcd.cChannels = 1;

        mcd.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);

        mcd.paDetails = &mcdMute;

        mixerSetControlDetails((HMIXEROBJ)hMixer, &mcd, MIXER_SETCONTROLDETAILSF_VALUE);

       }

      }

     }

    }

    MIXERLINE mxl;

    MIXERCONTROL mxc;

    MIXERLINECONTROLS mxlc;

    MIXERCAPS m_mxcaps;

    mixerOpen(&hMixer,0,NULL,

     NULL,MIXER_OBJECTF_MIXER | CALLBACK_WINDOW);

    mixerGetDevCaps((UINT)hMixer, &m_mxcaps, sizeof(MIXERCAPS));

    mxl.cbStruct = sizeof(MIXERLINE);

    mxl.dwComponentType =MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;

    mixerGetLineInfo((HMIXEROBJ)hMixer,&mxl,

     MIXER_OBJECTF_HMIXER|MIXER_GETLINEINFOF_COMPONENTTYPE);

    mxlc.cbStruct = sizeof(mxlc); // 微软用此办法判断版本

    mxlc.dwLineID = mxl.dwLineID; // 上面取得的声卡音频输出线路标识

    // 控制类型为控制音量

    mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;

    mxlc.cControls = 1;          // 使用 MIXERCONTROL 结构体变量个数

    mxlc.pamxctrl = &mxc;        // MIXERCONTROL 结构体变量指针

    mxlc.cbmxctrl = sizeof(mxc); // MIXERCONTROL 结构体变量字节大小

    // 取得控制器信息

    mixerGetLineControls((HMIXEROBJ)hMixer,

     &mxlc,

     MIXER_GETLINECONTROLSF_ONEBYTYPE);

    MIXERCONTROLDETAILS_UNSIGNED mxcdVolume;

    MIXERCONTROLDETAILS mxcd;

    mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);

    mxcd.dwControlID = mxc.dwControlID;

    mxcd.cChannels = 1;

    mxcd.cMultipleItems = 0;

    mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);

    mxcd.paDetails = &mxcdVolume;

    mixerGetControlDetails((HMIXEROBJ)hMixer,&mxcd,

     MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE);

    mxcdVolume.dwValue ;

    if (mxcdVolume.dwValue<6553)         // XP 系统 如果打开后系统音量小于10% 则增加到10%       

    {

     mxcdVolume.dwValue = 6553 ;

     mixerSetControlDetails((HMIXEROBJ)hMixer,&mxcd,

      MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE);

    }

   }

   mixerClose(hMixer);

   return FALSE;

  }

  catch(...)

  {

   mixerClose(hMixer);

   return FALSE;

  }

 }

 IMMDevice *defaultDevice = NULL;

 hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &defaultDevice);

 if (FAILED(hr))

 {

  return FALSE;

 }

 deviceEnumerator->Release();

 deviceEnumerator = NULL;

 IAudioEndpointVolume *endpointVolume;

 hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&endpointVolume));

 if (FAILED(hr))

 {

  return FALSE;

 }

 BOOL currentMute;

 hr = endpointVolume->GetMute(¤tMute);

 if (FAILED(hr))

 {

  return FALSE;

 }

 if (currentMute==TRUE)

 {

  hr = endpointVolume->SetMute(FALSE, NULL);

 }

 float currentVolume;

 hr = endpointVolume->GetMasterVolumeLevelScalar(¤tVolume);   //把主音量的水平标量

 if (FAILED(hr))

 {

  return FALSE;

 }

 if(currentVolume<0.1)     //windows  系统 如果系统音量小于10% 则音量增加到40%

 {

  float Volume = 0.400;

  hr = endpointVolume->SetMasterVolumeLevelScalar(Volume,NULL);

 }

 if (FAILED(hr))

 {

  return FALSE;

 }

 return SSN_OK;