Remove duplicate FFT demo

examples/Utilities/SimpleFFTDemo.h

@@ -1,171 +0,0 @@
-/*
-  ==============================================================================
-
-   This file is part of the JUCE examples.
-   Copyright (c) 2017 - ROLI Ltd.
-
-   The code included in this file is provided under the terms of the ISC license
-   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
-   To use, copy, modify, and/or distribute this software for any purpose with or
-   without fee is hereby granted provided that the above copyright notice and
-   this permission notice appear in all copies.
-
-   THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
-   WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
-   PURPOSE, ARE DISCLAIMED.
-
-  ==============================================================================
-*/
-
-/*******************************************************************************
- The block below describes the properties of this PIP. A PIP is a short snippet
- of code that can be read by the Projucer and used to generate a JUCE project.
-
- BEGIN_JUCE_PIP_METADATA
-
- name:             SimpleFFTDemo
- version:          1.0.0
- vendor:           JUCE
- website:          http://juce.com
- description:      Simple FFT application.
-
- dependencies:     juce_audio_basics, juce_audio_devices, juce_audio_formats,
-                   juce_audio_processors, juce_audio_utils, juce_core,
-                   juce_data_structures, juce_dsp, juce_events, juce_graphics,
-                   juce_gui_basics, juce_gui_extra
- exporters:        xcode_mac, vs2017
-
- type:             Component
- mainClass:        SimpleFFTDemo
-
- useLocalCopy:     1
-
- END_JUCE_PIP_METADATA
-
-*******************************************************************************/
-
-#pragma once
-
-
-//==============================================================================
-class SimpleFFTDemo   : public AudioAppComponent,
-                        private Timer
-{
-public:
-    SimpleFFTDemo()
-        : forwardFFT (fftOrder),
-          spectrogramImage (Image::RGB, 512, 512, true)
-    {
-        setOpaque (true);
-        setAudioChannels (2, 0);  // we want a couple of input channels but no outputs
-        startTimerHz (60);
-        setSize (700, 500);
-    }
-
-    ~SimpleFFTDemo()
-    {
-        shutdownAudio();
-    }
-
-    //==============================================================================
-    void prepareToPlay (int /*samplesPerBlockExpected*/, double /*newSampleRate*/) override
-    {
-        // (nothing to do here)
-    }
-
-    void releaseResources() override
-    {
-        // (nothing to do here)
-    }
-
-    void getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill) override
-    {
-        if (bufferToFill.buffer->getNumChannels() > 0)
-        {
-            auto* channelData = bufferToFill.buffer->getWritePointer (0, bufferToFill.startSample);
-
-            for (auto i = 0; i < bufferToFill.numSamples; ++i)
-                pushNextSampleIntoFifo (channelData[i]);
-        }
-    }
-
-    //==============================================================================
-    void paint (Graphics& g) override
-    {
-        g.fillAll (Colours::black);
-
-        g.setOpacity (1.0f);
-        g.drawImage (spectrogramImage, getLocalBounds().toFloat());
-    }
-
-    void timerCallback() override
-    {
-        if (nextFFTBlockReady)
-        {
-            drawNextLineOfSpectrogram();
-            nextFFTBlockReady = false;
-            repaint();
-        }
-    }
-
-    void pushNextSampleIntoFifo (float sample) noexcept
-    {
-        // if the fifo contains enough data, set a flag to say
-        // that the next line should now be rendered..
-        if (fifoIndex == fftSize)
-        {
-            if (! nextFFTBlockReady)
-            {
-                zeromem (fftData, sizeof (fftData));
-                memcpy (fftData, fifo, sizeof (fifo));
-                nextFFTBlockReady = true;
-            }
-
-            fifoIndex = 0;
-        }
-
-        fifo[fifoIndex++] = sample;
-    }
-
-    void drawNextLineOfSpectrogram()
-    {
-        auto rightHandEdge = spectrogramImage.getWidth() - 1;
-        auto imageHeight   = spectrogramImage.getHeight();
-
-        // first, shuffle our image leftwards by 1 pixel..
-        spectrogramImage.moveImageSection (0, 0, 1, 0, rightHandEdge, imageHeight);
-
-        // then render our FFT data..
-        forwardFFT.performFrequencyOnlyForwardTransform (fftData);
-
-        // find the range of values produced, so we can scale our rendering to
-        // show up the detail clearly
-        auto maxLevel = FloatVectorOperations::findMinAndMax (fftData, fftSize / 2);
-
-        for (auto y = 1; y < imageHeight; ++y)
-        {
-            auto skewedProportionY = 1.0f - std::exp (std::log (y / (float) imageHeight) * 0.2f);
-            auto fftDataIndex = jlimit (0, fftSize / 2, (int) (skewedProportionY * fftSize / 2));
-            auto level = jmap (fftData[fftDataIndex], 0.0f, jmax (maxLevel.getEnd(), 1e-5f), 0.0f, 1.0f);
-
-            spectrogramImage.setPixelAt (rightHandEdge, y, Colour::fromHSV (level, 1.0f, level, 1.0f));
-        }
-    }
-
-    enum
-    {
-        fftOrder = 10,
-        fftSize  = 1 << fftOrder
-    };
-
-private:
-    dsp::FFT forwardFFT;
-    Image spectrogramImage;
-
-    float fifo [fftSize];
-    float fftData [2 * fftSize];
-    int fifoIndex = 0;
-    bool nextFFTBlockReady = false;
-
-    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (SimpleFFTDemo)
-};