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/**
bespoke synth, a software modular synthesizer
Copyright (C) 2021 Ryan Challinor (contact: awwbees@gmail.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
//
// ButterworthFilterEffect.cpp
// Bespoke
//
// Created by Ryan Challinor on 5/19/16.
//
//
#include "ButterworthFilterEffect.h"
#include "SynthGlobals.h"
#include "FloatSliderLFOControl.h"
#include "Profiler.h"
#include "UIControlMacros.h"
ButterworthFilterEffect::ButterworthFilterEffect()
: mDryBuffer(gBufferSize)
{
}
void ButterworthFilterEffect::CreateUIControls()
{
IDrawableModule::CreateUIControls();
UIBLOCK0();
FLOATSLIDER(mFSlider, "F", &mF, 10, 4000);
FLOATSLIDER_DIGITS(mQSlider, "Q", &mQ, 0, 1, 3);
ENDUIBLOCK(mWidth, mHeight);
mFSlider->SetMaxValueDisplay("inf");
mFSlider->SetMode(FloatSlider::kSquare);
}
ButterworthFilterEffect::~ButterworthFilterEffect()
{
}
void ButterworthFilterEffect::Init()
{
IDrawableModule::Init();
}
void ButterworthFilterEffect::ProcessAudio(double time, ChannelBuffer* buffer)
{
PROFILER(ButterworthFilterEffect);
if (!mEnabled)
return;
float bufferSize = buffer->BufferSize();
mDryBuffer.SetNumActiveChannels(buffer->NumActiveChannels());
const float fadeOutStart = mFSlider->GetMax() * .75f;
const float fadeOutEnd = mFSlider->GetMax();
bool fadeOut = mF > fadeOutStart;
if (fadeOut)
mDryBuffer.CopyFrom(buffer);
for (int i = 0; i < bufferSize; ++i)
{
ComputeSliders(i);
if (mCoefficientsHaveChanged)
{
mButterworth[0].Set(mF, mQ);
for (int ch = 1; ch < buffer->NumActiveChannels(); ++ch)
mButterworth[ch].CopyCoeffFrom(mButterworth[0]);
mCoefficientsHaveChanged = false;
}
for (int ch = 0; ch < buffer->NumActiveChannels(); ++ch)
buffer->GetChannel(ch)[i] = mButterworth[ch].Run(buffer->GetChannel(ch)[i]);
}
if (fadeOut)
{
for (int ch = 0; ch < buffer->NumActiveChannels(); ++ch)
{
float dryness = ofMap(mF, fadeOutStart, fadeOutEnd, 0, 1);
Mult(buffer->GetChannel(ch), 1 - dryness, bufferSize);
Mult(mDryBuffer.GetChannel(ch), dryness, bufferSize);
Add(buffer->GetChannel(ch), mDryBuffer.GetChannel(ch), bufferSize);
}
}
}
void ButterworthFilterEffect::DrawModule()
{
mFSlider->Draw();
mQSlider->Draw();
}
float ButterworthFilterEffect::GetEffectAmount()
{
if (!mEnabled)
return 0;
return ofClamp(1 - (mF / (mFSlider->GetMax() * .75f)), 0, 1);
}
void ButterworthFilterEffect::ResetFilter()
{
for (int i = 0; i < ChannelBuffer::kMaxNumChannels; ++i)
mButterworth[i].Clear();
}
void ButterworthFilterEffect::DropdownUpdated(DropdownList* list, int oldVal, double time)
{
}
void ButterworthFilterEffect::CheckboxUpdated(Checkbox* checkbox, double time)
{
if (checkbox == mEnabledCheckbox)
{
ResetFilter();
}
}
void ButterworthFilterEffect::FloatSliderUpdated(FloatSlider* slider, float oldVal, double time)
{
if (slider == mFSlider || slider == mQSlider)
mCoefficientsHaveChanged = true;
}
void ButterworthFilterEffect::LoadLayout(const ofxJSONElement& info)
{
mModuleSaveData.LoadFloat("f_min", info, 10, 1, 40000, K(isTextField));
mModuleSaveData.LoadFloat("f_max", info, 10000, 1, 40000, K(isTextField));
}
void ButterworthFilterEffect::SetUpFromSaveData()
{
mFSlider->SetExtents(mModuleSaveData.GetFloat("f_min"), mModuleSaveData.GetFloat("f_max"));
ResetFilter();
}
void ButterworthFilterEffect::SaveLayout(ofxJSONElement& info)
{
mModuleSaveData.Save(info);
}
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