genesis-3d_engine/Engine/addons/soundsystem/SoundSystemDSPOpenAL.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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****************************************************************************/
#if __USE_AUDIO__ || __GENESIS_EDITOR__
#include "stdneb.h"
#include "SoundSystemDSPOpenAL.h"
#include "OpenAL/EFX-Util.h"
#include "soundsystem/Framework.h"
#include "soundsystem/SoundSystemSourceOpenAL.h"

namespace Sound
{
	__ImplementClass(Sound::SoundSystemDSPOpenAL, 'SSDO', Sound::SoundSystemDSP);

	//------------------------------------------------------------------------------
	SoundSystemDSPOpenAL::SoundSystemDSPOpenAL()
		: m_uiFilter(NULL)
		, m_uiEffectSlot(NULL)
		, m_type(NULL)
		, m_sendIndex(0)
	{}
	//------------------------------------------------------------------------------
	SoundSystemDSPOpenAL::~SoundSystemDSPOpenAL()
	{
		uninit();
	}
	//------------------------------------------------------------------------------
	bool SoundSystemDSPOpenAL::remove()
	{
		return false;
	}
	//------------------------------------------------------------------------------
	bool SoundSystemDSPOpenAL::setParameter( int index, float value , bool integer)
	{
        if(!CheckDspSupport())
            return false;
        
		if ( m_type != AL_FILTER_LOWPASS )
		{
			if (integer)
				alEffecti( m_uiFilter, index, (int)value);
			else
				alEffectf( m_uiFilter, index, value);

			if( alIsAuxiliaryEffectSlot( m_uiEffectSlot ) )
				alAuxiliaryEffectSloti( m_uiEffectSlot, AL_EFFECTSLOT_EFFECT, m_uiFilter);	
		}
		else
		{
			if (integer)
				alFilteri( m_uiFilter, index, (int)value);
			else
				alFilterf( m_uiFilter, index, value);
		}

		return true;
	}
	//------------------------------------------------------------------------------
	bool SoundSystemDSPOpenAL::setParameters( int index, float* pan)
	{
        if(!CheckDspSupport())
            return false;
        
		alEffectfv( m_uiFilter, index, pan);
		return true;
	}

	//------------------------------------------------------------------------------
	bool SoundSystemDSPOpenAL::init(ALuint type)
	{
        if(!CheckDspSupport())
            return false;
        
		// Clear AL Error State
		alGetError();

		ALboolean result = ALFWIsEFXSupported();
		if( result == AL_FALSE )
			return false;

		alGenAuxiliaryEffectSlots(1, &m_uiEffectSlot);
		if ( alGetError() != AL_NO_ERROR )
			return false;

		if ( type != AL_FILTER_LOWPASS )
		{
			// effect
			alGenEffects(1, &m_uiFilter);

			if( alGetError () == AL_NO_ERROR )
			{
				alEffecti(m_uiFilter, AL_EFFECT_TYPE, type);

				if (alGetError() == AL_NO_ERROR)
				{
					m_type = type;
					return true;
				}
				else
				{
					alDeleteEffects(1, &m_uiFilter);	
					return false;
				}
			}
			else
				return false;
		}
		else
		{
			// filter
			alGenFilters( 1, &m_uiFilter);

			if( alGetError () == AL_NO_ERROR )
			{
				alFilteri( (m_uiFilter), AL_FILTER_TYPE, type );

				if (alGetError() == AL_NO_ERROR)
				{
					m_type = type;
					return true;
				}
				else
				{
					alDeleteFilters(1, &m_uiFilter);	
					return false;
				}
			}
			else
				return false;
		}
	}

	//------------------------------------------------------------------------------
	bool SoundSystemDSPOpenAL::uninit()
	{
        if(!CheckDspSupport())
            return false;
        
		if ( alIsFilter(m_uiFilter) )
			alDeleteFilters( 1, &m_uiFilter );

		if ( alIsEffect(m_uiFilter))
			alDeleteEffects( 1, &m_uiFilter);

		if ( alIsAuxiliaryEffectSlot(m_uiEffectSlot) )
			alDeleteAuxiliaryEffectSlots( 1, &m_uiEffectSlot );

		m_type = NULL;

		return true;
	}

	bool SoundSystemDSPOpenAL::apply( SoundSystemSource* sss, int sendIndex)
	{
        if(!CheckDspSupport())
            return false;
        
		m_sendIndex = sendIndex;

		if(sss)
		{
			ALuint uiSource = NULL;
			uiSource = sss->GetSource();

			if (alIsSource(uiSource))
			{
				if (m_type == AL_FILTER_LOWPASS)
					alSourcei(uiSource, AL_DIRECT_FILTER, m_uiFilter);
				else
				{
					if( alIsAuxiliaryEffectSlot( m_uiEffectSlot ) )
					{
						alAuxiliaryEffectSloti( m_uiEffectSlot, AL_EFFECTSLOT_EFFECT, m_uiFilter);	
					}
					ALenum ret = alGetError();
					if (ret != AL_NO_ERROR)
					{
						return false;
					}

					alSource3i(uiSource, AL_AUXILIARY_SEND_FILTER, m_uiEffectSlot, m_sendIndex, AL_FILTER_NULL); // ???
					ret = alGetError();
					if (ret != AL_NO_ERROR)
					{
						return false;
					}
				}

				return true;
			}
			else
			{
				return false;
			}

		}
		else
			return false;
	}

	bool SoundSystemDSPOpenAL::unapply( SoundSystemSource* sss )
	{
        if(!CheckDspSupport())
            return false;
        
		if(sss)
		{
			ALuint uiSource = NULL;
			uiSource = sss->GetSource();

			if (alIsSource(uiSource))
			{
				if (m_type == AL_FILTER_LOWPASS)
					alSourcei( sss->GetSource(), AL_DIRECT_FILTER, AL_FILTER_NULL);
				else
					alSource3i( sss->GetSource(), AL_AUXILIARY_SEND_FILTER, AL_EFFECTSLOT_NULL, m_sendIndex, AL_FILTER_NULL);

				return true;
			}
		}

		return false;
	}
    
    bool SoundSystemDSPOpenAL::CheckDspSupport()
    {
        ALCcontext* pContext = alcGetCurrentContext();
        ALCdevice* pDevice = alcGetContextsDevice(pContext);
        
        if(!alcIsExtensionPresent(pDevice, (ALCchar*)ALC_EXT_EFX_NAME))
            return false;
        
        return true;
    }
}
#endif // __USE_AUDIO__ || __GENESIS_EDITOR__