volume~2.cpp

趣味编程媒体播~1.rar

		aControls[i].cbStruct = sizeof(MIXERCONTROL);
	}
	LineControls.cbStruct = sizeof(MIXERLINECONTROLS);
	LineControls.dwLineID = lineDestination.dwLineID;
	LineControls.cControls = nControlCount;
	LineControls.cbmxctrl = sizeof(MIXERCONTROL);
	LineControls.pamxctrl = &aControls[0];
	mmResult = mixerGetLineControls( (HMIXEROBJ)m_dwMixerHandle, &LineControls, MIXER_GETLINECONTROLSF_ALL );
	if ( mmResult == MMSYSERR_NOERROR )
	{
		for ( i = 0; i < nControlCount; i++ )
		{
			LONG lValue;
			bool bReadyToSet = false;
			switch (aControls[i].dwControlType)
			{
			case MIXERCONTROL_CONTROLTYPE_MUTE:
				lValue = (BOOL)!bEnable;
				bReadyToSet = true;
				break;
			case MIXERCONTROL_CONTROLTYPE_SINGLESELECT:
				lValue = (BOOL)bEnable;
				bReadyToSet = true;
				break;
			case MIXERCONTROL_CONTROLTYPE_MUX:
				lValue = (BOOL)bEnable;
				bReadyToSet = true;
				break;
			case MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT:
				lValue = (BOOL)bEnable;
				bReadyToSet = true;
				break;
			case MIXERCONTROL_CONTROLTYPE_MIXER:
				lValue = (BOOL)bEnable;
				bReadyToSet = true;
				break;
			}
			if ( bReadyToSet )
			{
				MIXERCONTROLDETAILS_BOOLEAN* aDetails = NULL;
				int nMultipleItems = aControls[i].cMultipleItems;
				int nChannels = nChannelCount;
				// MIXERCONTROLDETAILS
				MIXERCONTROLDETAILS ControlDetails;
				memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
				ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
				ControlDetails.dwControlID = aControls[i].dwControlID;
				if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_UNIFORM )
				{
					nChannels = 1;
				}
				if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_MULTIPLE )
				{
					nMultipleItems = aControls[i].cMultipleItems;
					aDetails = (MIXERCONTROLDETAILS_BOOLEAN*)malloc(nMultipleItems*nChannels*sizeof(MIXERCONTROLDETAILS_BOOLEAN));
					if ( !aDetails )
					{
						if ( bEnable )
						{
							TRACE(".MasterOutputVolume: FAILURE: Out of memory while enabling the line.\n" );
						} else {
							TRACE(".MasterOutputVolume: FAILURE: Out of memory while disabling the line.\n" );
						}
						continue;
					}
					for ( int nItem = 0; nItem < nMultipleItems; nItem++ )
					{
						/*
						if ( ( aControls[i].dwControlType & MIXERCONTROL_CONTROLTYPE_SINGLESELECT )
						  && ( nItem > 0 ) )
						{
							lValue = (LONG)!((BOOL)lValue);
						}
						*/
						for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
						{
							aDetails[nItem+nChannel].fValue = lValue;
						}
					}
				} else {
					nMultipleItems = 0;
					aDetails = (MIXERCONTROLDETAILS_BOOLEAN*)malloc(nChannels*sizeof(MIXERCONTROLDETAILS_BOOLEAN));
					if ( !aDetails )
					{
						if ( bEnable )
						{
							TRACE(".MasterOutputVolume: FAILURE: Out of memory while enabling the line.\n" );
						} else {
							TRACE(".MasterOutputVolume: FAILURE: Out of memory while disabling the line.\n" );
						}
						continue;
					}
					for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
					{
						aDetails[nChannel].fValue = (LONG)lValue;
					}
				}
				ControlDetails.cChannels = nChannels;
				ControlDetails.cMultipleItems = nMultipleItems;
				ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
				ControlDetails.paDetails = &aDetails[0];
				mmResult = mixerSetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, 0L );
				if ( mmResult == MMSYSERR_NOERROR )
				{
					if ( bEnable )
					{
						TRACE(".MasterOutputVolume: Enabling Line: Speakers Line control \"%s\"(0x%X) has been set to %d.\n", aControls[i].szShortName, aControls[i].dwControlType, lValue );
					} else {
						TRACE(".MasterOutputVolume: Disabling Line: Speakers Line control \"%s\"(0x%X) has been set to %d.\n", aControls[i].szShortName, aControls[i].dwControlType, lValue );
					}
					bAnyEnabled = true;
				}
				free( aDetails );
			}
		}
	} else {
		if ( bEnable )
		{
			TRACE(".MasterOutputVolume: FAILURE: Could not get the line controls while enabling. mmResult=%d\n", mmResult );
		} else {
			TRACE(".MasterOutputVolume: FAILURE: Could not get the line controls while disabling. mmResult=%d\n", mmResult );
		}
	}
	free( aControls );
	if ( !bAnyEnabled )
	{
		if ( bEnable )
		{
			TRACE(".MasterOutputVolume: WARNING: No controls were found for enabling the line.\n" );
		} else {
			TRACE(".MasterOutputVolume: WARNING: No controls were found for disabling the line.\n" );
		}
	}
}
//////////////////////////////////////////////
// IVolume interface
//////////////
bool CVolumeOutMaster::IsAvailable()
{
	return m_bAvailable;
}
//////////////
void CVolumeOutMaster::Enable()
{
	EnableLine( true );
}
void CVolumeOutMaster::Disable()
{
	EnableLine( false );
}
//////////////
DWORD CVolumeOutMaster::GetVolumeMetric()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwVolumeStep;
}
//////////////
DWORD CVolumeOutMaster::GetMinimalVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwMinimalVolume;
}
//////////////
DWORD CVolumeOutMaster::GetMaximalVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwMaximalVolume;
}
//////////////
DWORD CVolumeOutMaster::GetCurrentVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	MIXERCONTROLDETAILS_UNSIGNED* aDetails = (MIXERCONTROLDETAILS_UNSIGNED*)malloc(m_nChannelCount*sizeof(MIXERCONTROLDETAILS_UNSIGNED));
	if ( !aDetails )
		return BAD_DWORD;
	MIXERCONTROLDETAILS ControlDetails;
	memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
	ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
	ControlDetails.dwControlID = m_dwVolumeControlID;
	ControlDetails.cChannels = m_nChannelCount;
	ControlDetails.cMultipleItems = 0;
	ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	ControlDetails.paDetails = &aDetails[0];
	MMRESULT mmResult = mixerGetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, MIXER_GETCONTROLDETAILSF_VALUE );
	DWORD dw = aDetails[0].dwValue;
	free( aDetails );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".MasterOutputVolume: FAILURE: Could not get volume. mmResult=%d\n", mmResult );
		return BAD_DWORD;
	}
	return dw;
}
//////////////
void CVolumeOutMaster::SetCurrentVolume( DWORD dwValue )
{
	if ( !m_bAvailable || (dwValue<m_dwMinimalVolume) || (dwValue>m_dwMaximalVolume) )
		return;
	MIXERCONTROLDETAILS_UNSIGNED* aDetails = (MIXERCONTROLDETAILS_UNSIGNED*)malloc(m_nChannelCount*sizeof(MIXERCONTROLDETAILS_UNSIGNED));
	if ( !aDetails )
		return;
	for ( int i = 0; i < m_nChannelCount; i++ )
	{
		aDetails[i].dwValue = dwValue;
	}
	MIXERCONTROLDETAILS ControlDetails;
	memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
	ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
	ControlDetails.dwControlID = m_dwVolumeControlID;
	ControlDetails.cChannels = m_nChannelCount;
	ControlDetails.cMultipleItems = 0;
	ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	ControlDetails.paDetails = &aDetails[0];
	MMRESULT mmResult = mixerSetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, MIXER_SETCONTROLDETAILSF_VALUE );
	free( aDetails );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".MasterOutputVolume: FAILURE: Could not set volume(%d) mmResult=%d\n", dwValue, mmResult );
	}
}
//////////////
void CVolumeOutMaster::RegisterNotificationSink( PONMICVOULUMECHANGE pfUserSink, DWORD dwUserValue )
{
	m_pfUserSink = pfUserSink;
	m_dwUserValue = dwUserValue;
}
////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK CVolumeOutMaster::MixerWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
	if ( uMsg == MM_MIXM_CONTROL_CHANGE )
	{
		if ( g_pThis )
		{
			g_pThis->OnControlChanged( (DWORD)lParam );
		}
	}
	return ::DefWindowProc( hwnd, uMsg, wParam, lParam);
}