void printVolume()
{
HRESULT hr;
bool decibels = false;
bool scalar = false;
double newVolume = 10;
// -------------------------
CoInitialize(NULL);
IMMDeviceEnumerator *deviceEnumerator = NULL;
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);
IMMDevice *defaultDevice = NULL;
hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &defaultDevice);
deviceEnumerator->Release();
deviceEnumerator = NULL;
IAudioEndpointVolume *endpointVolume = NULL;
hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
defaultDevice->Release();
defaultDevice = NULL;
// -------------------------
float currentVolume = 0;
endpointVolume->GetMasterVolumeLevel(¤tVolume);
printf("Current volume in dB is: %f\n", currentVolume);
hr = endpointVolume->GetMasterVolumeLevelScalar(¤tVolume);
printf("Current volume as a scalar is: %f\n", currentVolume);
}
bool GetWin7AudioState(const VolumeAction action)
{
IMMDevice * pEndpoint = 0;
IAudioEndpointVolume * pEndptVol = 0;
bool success = false;
if (InitCom())
{
if (pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pEndpoint) == S_OK)
{
if (pEndpoint->Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, 0, (void**)&pEndptVol) == S_OK)
{
if (pEndptVol->GetMute(&is_mute) == S_OK && action == TOGGLE_MUTE)
{
success = pEndptVol->SetMute(is_mute == TRUE ? FALSE : TRUE, 0) == S_OK;
}
// get current volume
float vol = 0.0f;
if (action != TOGGLE_MUTE && pEndptVol->GetMasterVolumeLevelScalar(&vol) == S_OK)
{
master_volume = vol;
}
}
}
}
SAFE_RELEASE(pEndptVol)
SAFE_RELEASE(pEndpoint)
UnInitCom();
return success;
}
float GetMasterVolume() {
HRESULT hr;
CoInitialize(NULL);
IAudioEndpointVolume *endpointVolume = GetEndpointVolume();
float currentVolume = 0;
hr = endpointVolume->GetMasterVolumeLevelScalar(¤tVolume);
endpointVolume->Release();
CoUninitialize();
return currentVolume;
}
bool ChangeVolume(double nVolume,bool bScalar)
{
HRESULT hr=NULL;
bool decibels = false;
bool scalar = false;
double newVolume=nVolume;
CoInitialize(NULL);
IMMDeviceEnumerator *deviceEnumerator = NULL;
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER,
__uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);
IMMDevice *defaultDevice = NULL;
hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &defaultDevice);
deviceEnumerator->Release();
deviceEnumerator = NULL;
IAudioEndpointVolume *endpointVolume = NULL;
hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume),
CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
defaultDevice->Release();
defaultDevice = NULL;
// -------------------------
float currentVolume = 0;
endpointVolume->GetMasterVolumeLevel(¤tVolume);
//printf("Current volume in dB is: %f\n", currentVolume);
hr = endpointVolume->GetMasterVolumeLevelScalar(¤tVolume);
//CString strCur=L"";
//strCur.Format(L"%f",currentVolume);
//AfxMessageBox(strCur);
// printf("Current volume as a scalar is: %f\n", currentVolume);
if (bScalar==false)
{
hr = endpointVolume->SetMasterVolumeLevel((float)newVolume, NULL);
}
else if (bScalar==true)
{
hr = endpointVolume->SetMasterVolumeLevelScalar((float)newVolume, NULL);
}
endpointVolume->Release();
CoUninitialize();
return FALSE;
}
// Public method
// Gets the volume level of the default audio session
// of the currently selected endpoint rendering device.
// float fVolume: the range of the value from 0.0 to 1.0
AUDIO_DEVICE_API HRESULT GetCaptureListDeviceVolume(DeviceInfo *pDeviceInfo, int index, float *pfVolume)
{
InternalDeviceInfo *pInternalDeviceInfo = (InternalDeviceInfo *) pDeviceInfo;
HRESULT hr;
IMMDevice *pDevice = NULL;
IAudioEndpointVolume *pAudioVolume = NULL;
if (pInternalDeviceInfo->pCaptureCollection != NULL) {
hr = pInternalDeviceInfo->pCaptureCollection->Item(index, &pDevice);
}
if (hr != S_OK) goto errors;
hr = pDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_ALL, NULL, (void**)&pAudioVolume);
if (hr != S_OK) goto errors;
hr = pAudioVolume->GetMasterVolumeLevelScalar(pfVolume);
errors:
SAFE_RELEASE(pAudioVolume);
SAFE_RELEASE(pDevice);
return hr;
}
bool SetWin7Volume(UINT volume, int offset = 0)
{
IMMDevice * pEndpoint = 0;
IAudioEndpointVolume * pEndptVol = 0;
bool success = false;
if (InitCom())
{
if (pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pEndpoint) == S_OK)
{
if (pEndpoint->Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, 0, (void**)&pEndptVol) == S_OK)
{
pEndptVol->SetMute(FALSE, 0);
float vol = 0.0f;
if (offset != 0) // change master volume + offset
{
float off = static_cast<float>(offset) / 100.0f;
vol = master_volume + off;
vol = (vol < 0.0f) ? 0.0f : ((vol > 1.0f) ? 1.0f : vol);
}
else
{
vol = (float)volume / 100.0f;
}
// set to volume
success = pEndptVol->SetMasterVolumeLevelScalar(vol, 0) == S_OK;
if (success) success = pEndptVol->GetMasterVolumeLevelScalar(&vol) == S_OK;
if (success) master_volume = vol;
}
}
}
SAFE_RELEASE(pEndptVol)
SAFE_RELEASE(pEndpoint)
UnInitCom();
return success;
}
void modifyVolume(char ch)
{
HRESULT hr;
bool decibels = false;
bool scalar = true;
double newVolume = 10;
// -------------------------
CoInitialize(NULL);
IMMDeviceEnumerator *deviceEnumerator = NULL;
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);
IMMDevice *defaultDevice = NULL;
hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia, &defaultDevice);
deviceEnumerator->Release();
deviceEnumerator = NULL;
IAudioEndpointVolume *endpointVolume = NULL;
hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
defaultDevice->Release();
defaultDevice = NULL;
// -------------------------
float currentVolume = 0;
endpointVolume->GetMasterVolumeLevel(¤tVolume);
//printf("Current volume in dB is: %f\n", currentVolume);
hr = endpointVolume->GetMasterVolumeLevelScalar(¤tVolume);
float min, max, inc;
endpointVolume->GetVolumeRange(&min, &max, &inc);
//printf("Current volume as a scalar is: %f\n", currentVolume);
if (ch == 'u')
newVolume = currentVolume + 0.1;
else if (ch == 'd')
newVolume = currentVolume - 0.1;
if (ch == 'm')
{
endpointVolume->SetMute(TRUE, NULL);
}
else if (ch == 'n')
{
endpointVolume->SetMute(FALSE, NULL);
}
else
{
if (decibels)
{
hr = endpointVolume->SetMasterVolumeLevel((float)newVolume, NULL);
//endpointVolume->VolumeStepUp(NULL);
}
else if (scalar)
{
hr = endpointVolume->SetMasterVolumeLevelScalar((float)newVolume, NULL);
//endpointVolume->VolumeStepUp(NULL);
}
}
endpointVolume->Release();
CoUninitialize();
}