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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/>.
**/
//
// FilterViz.cpp
// Bespoke
//
// Created by Ryan Challinor on 12/24/14.
//
//
#include "FilterViz.h"
#include "ModularSynth.h"
#include "SynthGlobals.h"
#include "FFT.h"
#include "EffectFactory.h"
FilterViz::FilterViz()
{
mImpulseBuffer = new float[FILTER_VIZ_BINS];
mFFTOutReal = new float[FILTER_VIZ_BINS];
mFFTOutImag = new float[FILTER_VIZ_BINS];
Clear(mFFTOutReal, FILTER_VIZ_BINS);
Clear(mFFTOutImag, FILTER_VIZ_BINS);
for (int i = 0; i < 1; ++i)
{
IAudioEffect* filter = TheSynth->GetEffectFactory()->MakeEffect("eq");
AddChild(filter);
filter->SetPosition(4 + 100 * i, 20);
filter->SetName(("filter " + ofToString(i)).c_str());
mFilters.push_back(filter);
}
}
void FilterViz::CreateUIControls()
{
IDrawableModule::CreateUIControls();
for (int i = 0; i < mFilters.size(); ++i)
mFilters[i]->CreateUIControls();
}
FilterViz::~FilterViz()
{
for (int i = 0; i < mFilters.size(); ++i)
delete mFilters[i];
delete mImpulseBuffer;
delete mFFTOutReal;
delete mFFTOutImag;
}
void FilterViz::Poll()
{
mNeedUpdate = true;
if (mNeedUpdate)
{
GraphFilter();
mNeedUpdate = false;
}
}
void FilterViz::DrawModule()
{
if (Minimized() || IsVisible() == false)
return;
for (int i = 0; i < mFilters.size(); ++i)
mFilters[i]->Draw();
float w, h;
GetDimensions(w, h);
ofPushStyle();
{
ofSetColor(255, 255, 255);
ofPoint lastPoint(0, 0);
for (int i = 0; i < FILTER_VIZ_BINS / 2 - 1; ++i)
{
float a = float(i) / (FILTER_VIZ_BINS / 2 - 1);
a = sqrtf(a);
ofPoint point(a * w, h - (mFFTOutReal[i] / 12 * h));
if (i != 0)
ofLine(lastPoint, point);
lastPoint = point;
}
}
{
ofSetColor(255, 0, 255);
ofPoint lastPoint(0, 0);
for (int i = 0; i < FILTER_VIZ_BINS / 2 - 1; ++i)
{
float a = float(i) / (FILTER_VIZ_BINS / 2 - 1);
a = sqrtf(a);
ofPoint point(a * w, h / 2 - (mFFTOutImag[i] / (PI * 2) * h));
if (i != 0)
ofLine(lastPoint, point);
lastPoint = point;
}
}
ofPopStyle();
}
void FilterViz::GraphFilter()
{
Clear(mImpulseBuffer, FILTER_VIZ_BINS);
mImpulseBuffer[0] = 1;
ChannelBuffer temp(mImpulseBuffer, FILTER_VIZ_BINS);
for (int i = 0; i < mFilters.size(); ++i)
mFilters[i]->ProcessAudio(gTime, &temp);
::FFT fft(FILTER_VIZ_BINS);
fft.Forward(mImpulseBuffer, mFFTOutReal, mFFTOutImag);
for (int j = 0; j < FILTER_VIZ_BINS / 2 + 1; ++j)
{
float real = mFFTOutReal[j];
float imag = mFFTOutImag[j];
//cartesian to polar
float amp = 2. * sqrtf(real * real + imag * imag);
float phase = atan2(imag, real);
mFFTOutReal[j] = amp;
mFFTOutImag[j] = phase;
}
}
void FilterViz::DropdownUpdated(DropdownList* list, int oldVal, double time)
{
}
void FilterViz::FloatSliderUpdated(FloatSlider* slider, float oldVal, double time)
{
}
void FilterViz::ButtonClicked(ClickButton* button, double time)
{
}
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