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#include "UnityPrefix.h"
#include "AudioLowPassFilter.h"
#include "Runtime/Utilities/Utility.h"
#if ENABLE_AUDIO_FMOD
AudioLowPassFilter::AudioLowPassFilter (MemLabelId label, ObjectCreationMode mode) :
Super(label, mode),
m_CutoffFrequency(5000.0f),
m_LowpassResonanceQ(1.0f),
m_NeedToNormalizeCurve(false)
{
m_Type = FMOD_DSP_TYPE_LOWPASS;
}
AudioLowPassFilter::~AudioLowPassFilter()
{}
void AudioLowPassFilter::AwakeFromLoad (AwakeFromLoadMode awakeMode)
{
Super::AwakeFromLoad (awakeMode);
if (m_NeedToNormalizeCurve)
{
AudioSource* source = QueryComponent(AudioSource);
if (source)
ScaleCurveTime(m_LowpassLevelCustomCurve, 1 / source->GetMaxDistance());
}
}
void AudioLowPassFilter::Reset()
{
Super::Reset();
m_CutoffFrequency = 5000.0f;
m_LowpassResonanceQ = 1.0f;
m_NeedToNormalizeCurve = false;
// Curve initial values will be handled in CheckConsistency
m_LowpassLevelCustomCurve.ResizeUninitialized (0);
CheckConsistency ();
}
void AudioLowPassFilter::AddToManager()
{
Super::AddToManager();
}
void AudioLowPassFilter::CheckConsistency()
{
Super::CheckConsistency();
// @TODO get output freq from audiomanager
m_CutoffFrequency = clamp(m_CutoffFrequency, 10.0f, 22000.0f);
m_LowpassResonanceQ = clamp(m_LowpassResonanceQ, 1.0f, 10.0f);
if (m_LowpassLevelCustomCurve.GetKeyCount() < 1)
m_LowpassLevelCustomCurve.AddKey(AnimationCurve::Keyframe(0.0f, 1 - m_CutoffFrequency / 22000.0f));
}
void AudioLowPassFilter::Update()
{
if (m_DSP)
{
m_DSP->setParameter(FMOD_DSP_LOWPASS_CUTOFF, m_CutoffFrequency);
m_DSP->setParameter(FMOD_DSP_LOWPASS_RESONANCE, m_LowpassResonanceQ);
}
}
/// Set/Get spread curve
AnimationCurve& AudioLowPassFilter::GetCustomLowpassLevelCurve ()
{
return m_LowpassLevelCustomCurve;
}
const AnimationCurve& AudioLowPassFilter::GetCustomLowpassLevelCurve () const
{
return m_LowpassLevelCustomCurve;
}
void AudioLowPassFilter::SetCustomLowpassLevelCurve(const AnimationCurve& curve)
{
m_LowpassLevelCustomCurve = curve;
SetDirty();
}
template<class TransferFunc>
void AudioLowPassFilter::Transfer (TransferFunc& transfer)
{
Super::Transfer (transfer);
// 3.5 3: Normalized curve values
// <3.5 2: Non-Normalized curves
transfer.SetVersion (3);
TRANSFER(m_CutoffFrequency);
TRANSFER(m_LowpassResonanceQ);
transfer.Transfer(m_LowpassLevelCustomCurve, "lowpassLevelCustomCurve");
if (transfer.IsVersionSmallerOrEqual(2))
{
m_NeedToNormalizeCurve = true;
}
}
IMPLEMENT_CLASS (AudioLowPassFilter)
IMPLEMENT_OBJECT_SERIALIZE (AudioLowPassFilter)
#endif //ENABLE_AUDIO
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