volumeinxxx.cpp

很实用的程序. 用Virtual C++ 6.0做的,实现对声音的采集,处理,从而对MIC的声音进行控制的效果, 本程序是已成功测试通过.

	MMRESULT mmResult;

	MIXERLINE lineDestination;
	memset( &lineDestination, 0, sizeof(MIXERLINE) );
	lineDestination.cbStruct = sizeof(MIXERLINE);
	lineDestination.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
	mmResult = mixerGetLineInfo( (HMIXEROBJ)m_dwMixerHandle, &lineDestination, MIXER_GETLINEINFOF_COMPONENTTYPE );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".InputXxxVolume: FAILURE: Could not get the Destination Line while enabling. mmResult=%d\n", mmResult );
		return;
	}
	// Getting all line's controls
	int nControlCount = lineDestination.cControls;
	int nChannelCount = lineDestination.cChannels;
	MIXERLINECONTROLS LineControls;
	memset( &LineControls, 0, sizeof(MIXERLINECONTROLS) );
	MIXERCONTROL* aControls = (MIXERCONTROL*)malloc( nControlCount * sizeof(MIXERCONTROL) );
	if ( !aControls )
	{
		TRACE(".InputXxxVolume: FAILURE: Out of memory while enabling the line.\n" );
		return;
	}
	memset( &aControls[0], 0, sizeof(nControlCount * sizeof(MIXERCONTROL)) );
	for ( int i = 0; i < nControlCount; i++ )
	{
		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++ )
		{
			if ( aControls[i].dwControlType & MIXERCONTROL_CT_UNITS_BOOLEAN )
			{
				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 )
					{
						TRACE(".InputXxxVolume: FAILURE: Out of memory while enabling the line.\n" );
						continue;
					}
					for ( int nItem = 0; nItem < nMultipleItems; nItem++ )
					{
						LONG lValue = FALSE;
						if ( nItem == (int)m_uSourceLineIndex )
							lValue = TRUE;
						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 )
					{
						TRACE(".InputXxxVolume: FAILURE: Out of memory while enabling the line.\n" );
						continue;
					}
					for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
					{
						aDetails[nChannel].fValue = (LONG)TRUE;
					}
				}
				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 )
				{
					TRACE(".InputXxxVolume: Enabling Line: Line control \"%s\" has been enabled.\n", aControls[i].szShortName );
					bAnyEnabled = true;
				}
				free( aDetails );
			}
		}
	} else {
		TRACE(".InputXxxVolume: FAILURE: Could not get the line's controls while enabling. mmResult=%d\n", mmResult );
	}
	free( aControls );
	if ( !bAnyEnabled )
	{
		TRACE(".InputXxxVolume: WARNING: No controls were found for enabling the line.\n" );
	}
}
//////////////
void CVolumeInXXX::Disable()
{
	TRACE(".InputXxxVolume: WARNING: Disable line has no sense. The function not implemented.\n" );
}
//////////////
DWORD CVolumeInXXX::GetVolumeMetric()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwVolumeStep;
}
//////////////
DWORD CVolumeInXXX::GetMinimalVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwMinimalVolume;
}
//////////////
DWORD CVolumeInXXX::GetMaximalVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	return m_dwMaximalVolume;
}
//////////////
DWORD CVolumeInXXX::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(".InputXxxVolume: FAILURE: Could not get volume. mmResult=%d\n", mmResult );
		return BAD_DWORD;
	}
	return dw;
}
//////////////
void CVolumeInXXX::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(".InputXxxVolume: FAILURE: Could not set volume(%d) mmResult=%d\n", dwValue, mmResult );
	}
}
//////////////
void CVolumeInXXX::RegisterNotificationSink( PONMICVOULUMECHANGE pfUserSink, DWORD dwUserValue )
{
	m_pfUserSink = pfUserSink;
	m_dwUserValue = dwUserValue;
}
////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK CVolumeInXXX::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);
}
////////////////////////////////////////////////////////////////////////
bool CVolumeInXXX::EnumerateInputLines( PINPUTLINEPROC pUserCallback, DWORD dwUserValue )
{
	if ( !pUserCallback )
		return false;
	MMRESULT mmResult;
	HWAVEIN hwaveIn;
	WAVEFORMATEX WaveFmt;
	SetDeviceType( &WaveFmt );
	mmResult = waveInOpen( &hwaveIn, WAVE_MAPPER, &WaveFmt, 0L, 0L, CALLBACK_NULL );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".InputXxxVolume: FAILURE: Could not open WaveIn Mapper. mmResult=%d\n", mmResult );
		return false;
	}
	UINT uMixerID;
	DWORD dwMixerHandle;
	mmResult = mixerGetID( (HMIXEROBJ)hwaveIn, &uMixerID, MIXER_OBJECTF_HWAVEIN );
	waveInClose( hwaveIn );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".InputXxxVolume: FAILURE: WaveIn Mapper in Mixer is not available. mmResult=%d\n", mmResult );
		return false;
	}
	mmResult = mixerOpen( (LPHMIXER)&dwMixerHandle, uMixerID, 0L, 0L, 0L );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		mixerClose( (HMIXER)dwMixerHandle );
		TRACE(".InputXxxVolume: FAILURE: Could not open Mixer. mmResult=%d\n", mmResult );
		return false;
	}
	MIXERLINE MixerLine;
	memset( &MixerLine, 0, sizeof(MIXERLINE) );
	MixerLine.cbStruct = sizeof(MIXERLINE);
	MixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
	mmResult = mixerGetLineInfo( (HMIXEROBJ)dwMixerHandle, &MixerLine, MIXER_GETLINEINFOF_COMPONENTTYPE );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		mixerClose( (HMIXER)dwMixerHandle );
		TRACE(".InputXxxVolume: FAILURE: Could not get WaveIn Destionation Line for the requested source while enumerating. mmResult=%d\n", mmResult );
		return false;
	}
	MIXERLINE Line;
	for ( UINT uLineIndex = 0; uLineIndex < MixerLine.cConnections; uLineIndex++ )
	{
		memset( &Line, 0, sizeof(MIXERLINE) );
		Line.cbStruct = sizeof(MIXERLINE);
		Line.dwDestination = MixerLine.dwDestination;
		Line.dwSource = uLineIndex;
		mmResult = mixerGetLineInfo( (HMIXEROBJ)dwMixerHandle, &Line, MIXER_GETLINEINFOF_SOURCE );
		if ( mmResult != MMSYSERR_NOERROR )
		{
			mixerClose( (HMIXER)dwMixerHandle );
			TRACE(".InputXxxVolume: FAILURE: Could not get the interated Source Line while enumerating. mmResult=%d\n", mmResult );
			return false;
		}
		if ( !((*pUserCallback)( uLineIndex, &Line, dwUserValue )) )
		{
			break;
		}
	}
	mixerClose( (HMIXER)dwMixerHandle );
	return true;
}