Ejemplo n.º 1
0
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;
}
Ejemplo n.º 2
0
bool GetMute() {
  HRESULT hr;
  CoInitialize(NULL);
  IAudioEndpointVolume *endpointVolume = GetEndpointVolume();
  BOOL currentMute = false;
  hr = endpointVolume->GetMute(&currentMute);
  endpointVolume->Release();
  CoUninitialize();
  return (bool)currentMute;
}
Ejemplo n.º 3
0
void SetMuteStatus()
{
    HRESULT hr;

    CoInitialize(NULL);
    IMMDeviceEnumerator *deviceEnumerator = NULL;
    hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *)&deviceEnumerator);
    if (!SUCCEEDED(hr)) 
    {
        CoUninitialize();
    }

    IMMDevice *defaultDevice = NULL;

    hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &defaultDevice);
    deviceEnumerator->Release();
    deviceEnumerator = NULL;
    if (!SUCCEEDED(hr))
    {
        CoUninitialize();
    }

    IAudioEndpointVolume *endpointVolume = NULL;
    hr = defaultDevice->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (LPVOID *)&endpointVolume);
    defaultDevice->Release();
    defaultDevice = NULL; 

    if (!SUCCEEDED(hr)) 
    {
        CoUninitialize();
    }

    // -------------------------
	BOOL b;

	endpointVolume->GetMute(&b);
	b=!b;
	endpointVolume->SetMute(b, NULL);
	endpointVolume->Release();
    CoUninitialize();
}
/**********************************************************************************

Function Name = LeapDesktopAppFull::volumeManipulation

Descriptive Name = Increase/decrease/mute/unmute the volume

Function =

    This functions is responsible for performing the actions of increasing/
    decreasing/muting/unmuting the volume. Makes use of the available functions on 
    windows to construct and initialize the interface of audio devices for communication.

Dependencies =

    None

Restrictions =

    Must have audio devices connected, running and capable of being accessed through the 
    IMMDeviceEnumerator interface.

Input =
    
    string controlOption - The volume action to be performed, supports the following options:
                                VOLUME_STEP_UP      - This option will increase the volume by 1
                                VOLUME_STEP_DOWN    - This option will decrease the volume by 1
                                VOLUME_MUTE_UNMUTE  - This option will mute or unmute based on 
                                                      what the state of the volume currently is.

Output =
   
   Currently there are no outputs from this functions as it only performs the action. 
   Future TODO is to make sure errors are handled and appropriate response is returned.

Normal Return =
    
    N/A

Error Return =

    N/A

******************************************************************************/
void LeapDesktopAppFull::volumeManipulation ( string controlOption )
{
    // Variable Declaration
    HRESULT              volumeManipulationResults = NULL ;  // Stores detailed information for the volume communication interface
    IMMDeviceEnumerator  *deviceEnumerator         = NULL ;  // Stores the interface pointer of enumerating audio devices
    IMMDevice            *defaultDevice            = NULL ;  // Stores all the default audio devices resources
    IAudioEndpointVolume *endpointVolume           = NULL ;  // Stores the volume controls on the audio streams 
    BOOL                 pbMute                    = FALSE ; //

    // Initialize the COM library on the current thread
    CoInitialize ( NULL ) ;

    // Create an instance of a single uninitialized object of audio devices, a success instance creation will return "S_OK"
    volumeManipulationResults = CoCreateInstance ( __uuidof( MMDeviceEnumerator ),    // The CLSID associated with the data and code that is used to create the object
                                                   NULL,                              // Set to NULL to identify that object is not being created as an aggregate
                                                   CLSCTX_INPROC_SERVER,              // Identifies how the new object will run, in this case it is a DLL that runs in the same process
                                                   __uuidof( IMMDeviceEnumerator ),   // The identifier of the interface that will be used to communicate with the object
                                                   ( LPVOID * ) &deviceEnumerator     // Pointer that will store the interface pointer that was requested
                                                 ) ;

    // Using the device enumerator interface get the default audio endpoint for the provided data-flow direction
    volumeManipulationResults = deviceEnumerator->GetDefaultAudioEndpoint ( eRender,          // Set to eRender to represent an audio rendering stream
                                                                            eConsole,         // Set to eConsole to represent the role that is assigned to the endpoint device
                                                                            &defaultDevice    // Pointer to which the device address is stored of the endpoint object
                                                                          ) ;

    // No longer need the pointer for the device enumerator interface so release it to free up memory
    deviceEnumerator->Release () ;
    deviceEnumerator = NULL ;  // Force un-initialization

    // Activate the device that was retrieved above, a success activation will return "S_OK"
    volumeManipulationResults = defaultDevice->Activate ( __uuidof( IAudioEndpointVolume ), // The interface identifier, in this case this is an audio endpoint device
                                                          CLSCTX_INPROC_SERVER,             // Identifies how the new object will run, in this case it is a DLL that runs in the same process
                                                          NULL,                             // Set to NULL to activate an IAudioEndpointVolume interface on an audio endpoint device
                                                          ( LPVOID * ) &endpointVolume      // Pointer which stores the address of the IAudioEndpointVolume interface
                                                        ) ;

    // No longer need the pointer for the device interface so release it to free up memory
    defaultDevice->Release () ;
    defaultDevice = NULL ; // Force un-initialization

    // From the endpointVolume interface get the mute status
    // GetMute returns TRUE for muted and FALSE for the stream not muted
    endpointVolume->GetMute ( &pbMute ) ;

    // Based on the mute status perform the action of muting or unmuting the stream
    if ( ( pbMute && controlOption == VOLUME_MUTE_UNMUTE ) )
    {
        // Found that the stream is already currently muted so un-mute the stream
        volumeManipulationResults = endpointVolume->SetMute ( 0, NULL ) ;

        // Display user feed back image based on the action performed
        createUserFeedBackWindow ( loadResource ( RES_KEYTAP_IMAGE ), 150, 131 ) ;
    }
    else if ( !pbMute && controlOption == VOLUME_MUTE_UNMUTE )
    {
        // Found that the stream is not mute so mute the stream
        volumeManipulationResults = endpointVolume->SetMute ( 1, NULL ) ;

        // Display user feed back image based on the action performed
        createUserFeedBackWindow ( loadResource ( RES_KEYTAPRELEASE_IMAGE ), 150, 131 ) ;
    }

    // Based on the volume increase/decrease option, perform the appropriate action
    if ( controlOption == VOLUME_STEP_UP )
    {
        // Increase the volume on the stream by one, this also will update any connected system notifications
        volumeManipulationResults = endpointVolume->VolumeStepUp ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepUp ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepUp ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepUp ( NULL );
    }
    else if ( controlOption == VOLUME_STEP_DOWN )
    {
        // Decrease the volume on the stream by one, this also will update any connected system notifications
        volumeManipulationResults = endpointVolume->VolumeStepDown ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepDown ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepDown ( NULL );
        volumeManipulationResults = endpointVolume->VolumeStepDown ( NULL );
    }

    // No longer need the endpointVolume interface so release it to free up memory
    endpointVolume->Release ();

    // All the actions that are to be performed on the end point device are done so un-initialize the instance
    CoUninitialize ();
}