C++ DSP::setParameterFloat方法代码示例

//Sets a parameter a of effect e to value v. For parameters of different effects, see fmod_dsp_effects.h
GMexport double FMODGMS_Effect_Set_Parameter(double e, double p, double v)
{
	int effectIndex = (int)round(e);
	if ((effectIndex < 0) || (effectIndex >= (int)effectList.size()))
	{
		errorMessage = "Invalid effect index";
		return GMS_error;
	}
	FMOD::DSP* effect = effectList[effectIndex];

	int param = (int)round(p);
	int value = (int)round(v);
	FMOD_DSP_PARAMETER_DESC* desc = NULL;
	if (effect->getParameterInfo(param, &desc) != FMOD_OK)
	{
		errorMessage = "Could not get effect parameter info, probably invalid param index";
		return GMS_error;
	}

	if (desc->type == FMOD_DSP_PARAMETER_TYPE_FLOAT)
	{
		if (effect->setParameterFloat(param, (float)value) == FMOD_OK)
			return FMODGMS_Util_ErrorChecker();
	}
	else if (desc->type == FMOD_DSP_PARAMETER_TYPE_INT)
	{
		if (effect->setParameterInt(param, (int)round(value)) == FMOD_OK)
			return FMODGMS_Util_ErrorChecker();
	}
	else if (desc->type == FMOD_DSP_PARAMETER_TYPE_BOOL)
	{
		if (effect->setParameterBool(param, (bool)(value > 0.5)) == FMOD_OK)
			return FMODGMS_Util_ErrorChecker();
	}
	else
	{
		errorMessage = "Unsupported effect parameter type";
		return GMS_error;
	}
	
	errorMessage = "Could not set effect parameter";
	return GMS_error;
}

int FMOD_Main()
{
    FMOD::System    *system;
    FMOD::Channel   *channel = 0;
    FMOD::DSP       *dsp;
    FMOD_RESULT      result;
    unsigned int     version;
    void            *extradriverdata = 0;

    Common_Init(&extradriverdata);
    
    /*
        Create a System object and initialize.
    */
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
    }

    result = system->init(32, FMOD_INIT_NORMAL, extradriverdata);
    ERRCHECK(result);

    /*
        Create an oscillator DSP units for the tone.
    */
    result = system->createDSPByType(FMOD_DSP_TYPE_OSCILLATOR, &dsp);
    ERRCHECK(result);
    result = dsp->setParameterFloat(FMOD_DSP_OSCILLATOR_RATE, 440.0f); /* Musical note 'A' */
    ERRCHECK(result);

    /*
        Main loop
    */
    do
    {
        Common_Update();

        if (Common_BtnPress(BTN_ACTION1))
        {
            if (channel)
            {
                result = channel->stop();
                ERRCHECK(result);
            }

            result = system->playDSP(dsp, 0, true, &channel);
            ERRCHECK(result);
            result = channel->setVolume(0.5f);
            ERRCHECK(result);
            result = dsp->setParameterInt(FMOD_DSP_OSCILLATOR_TYPE, 0);
            ERRCHECK(result);
            result = channel->setPaused(false);
            ERRCHECK(result);
        }

        if (Common_BtnPress(BTN_ACTION2))
        {
            if (channel)
            {
                result = channel->stop();
                ERRCHECK(result);
            }

            result = system->playDSP(dsp, 0, true, &channel);
            ERRCHECK(result);
            result = channel->setVolume(0.125f);
            ERRCHECK(result);
            result = dsp->setParameterInt(FMOD_DSP_OSCILLATOR_TYPE, 1);
            ERRCHECK(result);
            result = channel->setPaused(false);
            ERRCHECK(result);
        }

        if (Common_BtnPress(BTN_ACTION3))
        {
            if (channel)
            {
                result = channel->stop();
                ERRCHECK(result);
            }

            result = system->playDSP(dsp, 0, true, &channel);
            ERRCHECK(result);
            result = channel->setVolume(0.125f);
            ERRCHECK(result);
            result = dsp->setParameterInt(FMOD_DSP_OSCILLATOR_TYPE, 2);
            ERRCHECK(result);
            result = channel->setPaused(false);
            ERRCHECK(result);
        }

        if (Common_BtnPress(BTN_ACTION4))
        {
            if (channel)
//.........这里部分代码省略.........

void InitFmod(){
	cfmod(FMOD::System_Create(&fmodSystem));

	u32 version = 0;
	cfmod(fmodSystem->getVersion(&version));
	if(version < FMOD_VERSION){
		std::cerr 
			<< "FMOD version of at least " << FMOD_VERSION 
			<< " required. Version used " << version 
			<< std::endl;
		throw "FMOD Error";
	}

	cfmod(fmodSystem->init(100, FMOD_INIT_NORMAL, nullptr));

	FMOD::DSP* dsp;
	FMOD::DSP* compressor;

	{	FMOD_DSP_DESCRIPTION desc;
		memset(&desc, 0, sizeof(desc));

		// strncpy(desc.name, "Fuckyou", sizeof(desc.name));
		desc.numinputbuffers = 0;
		desc.numoutputbuffers = 1;
		desc.read = DSPCallback;
		desc.userdata = new DSPUserdata{/*sched, */0.0};

		cfmod(fmodSystem->createDSP(&desc, &dsp));
		cfmod(dsp->setChannelFormat(FMOD_CHANNELMASK_STEREO,2,FMOD_SPEAKERMODE_STEREO));
	}

	cfmod(fmodSystem->createDSPByType(FMOD_DSP_TYPE_COMPRESSOR, &compressor));

	cfmod(compressor->setParameterFloat(FMOD_DSP_COMPRESSOR_THRESHOLD, -13));
	cfmod(compressor->setParameterFloat(FMOD_DSP_COMPRESSOR_ATTACK, 1));
	cfmod(compressor->setBypass(false));
	cfmod(dsp->setBypass(false));

	FMOD::ChannelGroup* mastergroup;
	cfmod(fmodSystem->getMasterChannelGroup(&mastergroup));
	cfmod(mastergroup->addDSP(0, compressor));
	cfmod(fmodSystem->playDSP(dsp, mastergroup, false, &channel));
	cfmod(channel->setMode(FMOD_2D));
	cfmod(channel->setVolume(0.7f));

	FMOD::Reverb3D* reverb;
	cfmod(fmodSystem->createReverb3D(&reverb));

	// http://www.fmod.org/docs/content/generated/FMOD_REVERB_PROPERTIES.html

	FMOD_REVERB_PROPERTIES rprops = {
		.DecayTime			= 8000.0, //1500.0, /* Reverberation decay time in ms */
		.EarlyDelay			= 7.0, //7.0, /* Initial reflection delay time */
		.LateDelay			= 11.0, //11.0, /* Late reverberation delay time relative to initial reflection */
		.HFReference		= 5000.0, /* Reference high frequency (hz) */
		.HFDecayRatio		= 50.0, /* High-frequency to mid-frequency decay time ratio */
		.Diffusion			= 60.0, /* Value that controls the echo density in the late reverberation decay. */
		.Density			= 100.0, //100.0, /* Value that controls the modal density in the late reverberation decay */
		.LowShelfFrequency	= 250.0, /* Reference low frequency (hz) */
		.LowShelfGain		= 0.0, /* Relative room effect level at low frequencies */
		.HighCut			= 10000.0, /* Relative room effect level at high frequencies */
		.EarlyLateMix		= 50.0, /* Early reflections level relative to room effect */
		.WetLevel			= -12.0, //-6.0, /* Room effect level (at mid frequencies) */
	};

	cfmod(reverb->setProperties(&rprops));
}

int FMOD_Main()
{
    void *extradriverdata = 0;    
    Common_Init(&extradriverdata);

    /*
        Create a System object and initialize
    */
    FMOD_RESULT result;
    FMOD::System* system;
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    unsigned int version;
    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
    }
    
    result = system->init(32, FMOD_INIT_NORMAL, extradriverdata);
    ERRCHECK(result);
        

    /*
        Create a new channel group to hold the convolution DSP unit
    */
    FMOD::ChannelGroup* reverbGroup;
    result = system->createChannelGroup("reverb", &reverbGroup);
    ERRCHECK(result);

    
    /*
        Create a new channel group to hold all the channels and process the dry path
    */
    FMOD::ChannelGroup* mainGroup;
    result = system->createChannelGroup("main", &mainGroup);
    ERRCHECK(result);

    /*
        Create the convultion DSP unit and set it as the tail of the channel group
    */
    FMOD::DSP* reverbUnit;    
    result = system->createDSPByType(FMOD_DSP_TYPE_CONVOLUTIONREVERB, &reverbUnit);
    ERRCHECK(result);
    result = reverbGroup->addDSP(FMOD_CHANNELCONTROL_DSP_TAIL, reverbUnit);
    ERRCHECK(result);

    /*
        Open the impulse response wav file, but use FMOD_OPENONLY as we want
        to read the data into a seperate buffer
    */
    FMOD::Sound* irSound;
    result = system->createSound(Common_MediaPath("standrews.wav"), FMOD_DEFAULT | FMOD_OPENONLY, NULL, &irSound);
    ERRCHECK(result);

    /*
        Retrieve the sound information for the Impulse Response input file
    */
    FMOD_SOUND_FORMAT irSoundFormat;
    FMOD_SOUND_TYPE irSoundType;
    int irSoundBits, irSoundChannels;
    result = irSound->getFormat(&irSoundType, &irSoundFormat, &irSoundChannels, &irSoundBits);
    ERRCHECK(result);
    unsigned int irSoundLength;
    result = irSound->getLength(&irSoundLength, FMOD_TIMEUNIT_PCM);
    ERRCHECK(result);

    
    if (irSoundFormat != FMOD_SOUND_FORMAT_PCM16)
    {
        /*
            For simplicity of the example, if the impulse response is the wrong format just display an error
        */        
        Common_Fatal("Impulse Response file is the wrong audio format");
    }

    /*
        The reverb unit expects a block of data containing a single 16 bit int containing
        the number of channels in the impulse response, followed by PCM 16 data
    */
    unsigned int irDataLength = sizeof(short) * (irSoundLength * irSoundChannels + 1);
    short* irData = (short*)malloc(irDataLength);
    irData[0] = irSoundChannels;
    unsigned int irDataRead;
    result = irSound->readData(&irData[1], irDataLength - sizeof(short), &irDataRead);
    ERRCHECK(result);
    result = reverbUnit->setParameterData(FMOD_DSP_CONVOLUTION_REVERB_PARAM_IR, irData, irDataLength);
    ERRCHECK(result);

    /*
        Don't pass any dry signal from the reverb unit, instead take the dry part
        of the mix from the main signal path
    */
    result = reverbUnit->setParameterFloat(FMOD_DSP_CONVOLUTION_REVERB_PARAM_DRY, -80.0f);    
    ERRCHECK(result);

    /*
//.........这里部分代码省略.........

// Taken mostly from ActiveSound.cpp
void UFMODAudioComponent::UpdateInteriorVolumes()
{
	// Result of the ambient calculations to apply to the instance
	float AmbientVolumeMultiplier = 1.0f;
	float AmbientHighFrequencyGain = 1.0f;

	FInteriorSettings Ambient;
	const FVector& Location = GetOwner()->GetTransform().GetTranslation();
	AAudioVolume* AudioVolume = GetWorld()->GetAudioSettings(Location, NULL, &Ambient);

	const FFMODListener& Listener = IFMODStudioModule::Get().GetNearestListener(Location);
	if( InteriorLastUpdateTime < Listener.InteriorStartTime )
	{
		SourceInteriorVolume = CurrentInteriorVolume;
		SourceInteriorLPF = CurrentInteriorLPF;
		InteriorLastUpdateTime = FApp::GetCurrentTime();
	}


	bool bAllowSpatialization = true;
	if( Listener.Volume == AudioVolume || !bAllowSpatialization )
	{
		// Ambient and listener in same ambient zone
		CurrentInteriorVolume = ( SourceInteriorVolume * ( 1.0f - Listener.InteriorVolumeInterp ) ) + Listener.InteriorVolumeInterp;
		AmbientVolumeMultiplier *= CurrentInteriorVolume;

		CurrentInteriorLPF = ( SourceInteriorLPF * ( 1.0f - Listener.InteriorLPFInterp ) ) + Listener.InteriorLPFInterp;
		AmbientHighFrequencyGain *= CurrentInteriorLPF;

		//UE_LOG(LogFMOD, Verbose, TEXT( "Ambient in same volume. Volume *= %g LPF *= %g" ), CurrentInteriorVolume, CurrentInteriorLPF);
	}
	else
	{
		// Ambient and listener in different ambient zone
		if( Ambient.bIsWorldSettings )
		{
			// The ambient sound is 'outside' - use the listener's exterior volume
			CurrentInteriorVolume = ( SourceInteriorVolume * ( 1.0f - Listener.ExteriorVolumeInterp ) ) + ( Listener.InteriorSettings.ExteriorVolume * Listener.ExteriorVolumeInterp );
			AmbientVolumeMultiplier *= CurrentInteriorVolume;

			CurrentInteriorLPF = ( SourceInteriorLPF * ( 1.0f - Listener.ExteriorLPFInterp ) ) + ( Listener.InteriorSettings.ExteriorLPF * Listener.ExteriorLPFInterp );
			AmbientHighFrequencyGain *= CurrentInteriorLPF;

			//UE_LOG(LogFMOD, Verbose, TEXT( "Ambient in diff volume, ambient outside. Volume *= %g LPF *= %g" ), CurrentInteriorVolume, CurrentInteriorLPF);
		}
		else
		{
			// The ambient sound is 'inside' - use the ambient sound's interior volume multiplied with the listeners exterior volume
			CurrentInteriorVolume = (( SourceInteriorVolume * ( 1.0f - Listener.InteriorVolumeInterp ) ) + ( Ambient.InteriorVolume * Listener.InteriorVolumeInterp ))
										* (( SourceInteriorVolume * ( 1.0f - Listener.ExteriorVolumeInterp ) ) + ( Listener.InteriorSettings.ExteriorVolume * Listener.ExteriorVolumeInterp ));
			AmbientVolumeMultiplier *= CurrentInteriorVolume;

			CurrentInteriorLPF = (( SourceInteriorLPF * ( 1.0f - Listener.InteriorLPFInterp ) ) + ( Ambient.InteriorLPF * Listener.InteriorLPFInterp ))
										* (( SourceInteriorLPF * ( 1.0f - Listener.ExteriorLPFInterp ) ) + ( Listener.InteriorSettings.ExteriorLPF * Listener.ExteriorLPFInterp ));
			AmbientHighFrequencyGain *= CurrentInteriorLPF;

			//UE_LOG(LogFMOD, Verbose, TEXT( "Ambient in diff volume, ambient inside. Volume *= %g LPF *= %g" ), CurrentInteriorVolume, CurrentInteriorLPF);
		}
	}

	StudioInstance->setVolume(AmbientVolumeMultiplier);

	FMOD::ChannelGroup* ChanGroup = nullptr;
	StudioInstance->getChannelGroup(&ChanGroup);
	if (ChanGroup)
	{
		int NumDSP = 0;
		ChanGroup->getNumDSPs(&NumDSP);
		for (int Index=0; Index<NumDSP; ++Index)
		{
			FMOD::DSP* ChanDSP = nullptr;
			ChanGroup->getDSP(Index, &ChanDSP);
			if (ChanDSP)
			{
				FMOD_DSP_TYPE DSPType = FMOD_DSP_TYPE_UNKNOWN;
				ChanDSP->getType(&DSPType);
				if (DSPType == FMOD_DSP_TYPE_LOWPASS || DSPType == FMOD_DSP_TYPE_LOWPASS_SIMPLE)
				{
					static float MAX_FREQUENCY = 8000.0f;
					float Frequency = MAX_FREQUENCY * AmbientHighFrequencyGain;
					ChanDSP->setParameterFloat(FMOD_DSP_LOWPASS_CUTOFF, MAX_FREQUENCY * AmbientHighFrequencyGain);
					break;
				}
			}
		}
	}
}