Fixes to the UI
This commit is contained in:
96
Examples/WavetableSynthTutorial/Source/Main.cpp
Normal file
96
Examples/WavetableSynthTutorial/Source/Main.cpp
Normal file
@@ -0,0 +1,96 @@
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/*
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==============================================================================
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This file contains the startup code for a PIP.
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==============================================================================
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*/
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#include <JuceHeader.h>
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#include "WavetableSynthTutorial_01.h"
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class Application : public juce::JUCEApplication
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{
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public:
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//==============================================================================
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Application() = default;
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const juce::String getApplicationName() override { return "WavetableSynthTutorial"; }
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const juce::String getApplicationVersion() override { return "1.0.0"; }
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void initialise (const juce::String&) override
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{
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mainWindow.reset (new MainWindow ("WavetableSynthTutorial", std::make_unique<MainContentComponent>(), *this));
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}
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void shutdown() override { mainWindow = nullptr; }
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private:
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class MainWindow : public juce::DocumentWindow
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{
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public:
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MainWindow (const juce::String& name, std::unique_ptr<juce::Component> c, JUCEApplication& a)
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: DocumentWindow (name, juce::Desktop::getInstance().getDefaultLookAndFeel()
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.findColour (ResizableWindow::backgroundColourId),
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juce::DocumentWindow::allButtons),
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app (a)
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{
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setUsingNativeTitleBar (true);
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#if JUCE_ANDROID || JUCE_IOS
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setContentOwned (new SafeAreaComponent { std::move (c) }, true);
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setFullScreen (true);
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#else
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setContentOwned (c.release(), true);
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setResizable (true, false);
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setResizeLimits (300, 250, 10000, 10000);
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centreWithSize (getWidth(), getHeight());
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#endif
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setVisible (true);
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}
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void closeButtonPressed() override
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{
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app.systemRequestedQuit();
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}
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#if JUCE_ANDROID || JUCE_IOS
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class SafeAreaComponent : public juce::Component
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{
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public:
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explicit SafeAreaComponent (std::unique_ptr<Component> c)
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: content (std::move (c))
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{
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addAndMakeVisible (*content);
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}
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void resized() override
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{
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if (const auto* d = Desktop::getInstance().getDisplays().getDisplayForRect (getLocalBounds()))
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content->setBounds (d->safeAreaInsets.subtractedFrom (getLocalBounds()));
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}
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private:
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std::unique_ptr<Component> content;
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};
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void parentSizeChanged() override
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{
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if (auto* c = getContentComponent())
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c->resized();
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}
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#endif
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private:
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JUCEApplication& app;
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//==============================================================================
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainWindow)
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};
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std::unique_ptr<MainWindow> mainWindow;
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};
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//==============================================================================
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START_JUCE_APPLICATION (Application)
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@@ -0,0 +1,163 @@
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/*
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==============================================================================
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This file is part of the JUCE tutorials.
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Copyright (c) 2020 - Raw Material Software Limited
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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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,
|
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WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
|
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PURPOSE, ARE DISCLAIMED.
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||||
|
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==============================================================================
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*/
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/*******************************************************************************
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The block below describes the properties of this PIP. A PIP is a short snippet
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of code that can be read by the Projucer and used to generate a JUCE project.
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BEGIN_JUCE_PIP_METADATA
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name: WavetableSynthTutorial
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version: 1.0.0
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vendor: JUCE
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website: http://juce.com
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description: Wavetable synthesiser.
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dependencies: juce_audio_basics, juce_audio_devices, juce_audio_formats,
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juce_audio_processors, juce_audio_utils, juce_core,
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juce_data_structures, juce_events, juce_graphics,
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juce_gui_basics, juce_gui_extra
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exporters: xcode_mac, vs2019, linux_make
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type: Component
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mainClass: MainContentComponent
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useLocalCopy: 1
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END_JUCE_PIP_METADATA
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*******************************************************************************/
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#pragma once
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//==============================================================================
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class SineOscillator
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{
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public:
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SineOscillator() {}
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void setFrequency (float frequency, float sampleRate)
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{
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auto cyclesPerSample = frequency / sampleRate;
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angleDelta = cyclesPerSample * juce::MathConstants<float>::twoPi;
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}
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forcedinline void updateAngle() noexcept
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{
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currentAngle += angleDelta;
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if (currentAngle >= juce::MathConstants<float>::twoPi)
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currentAngle -= juce::MathConstants<float>::twoPi;
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}
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forcedinline float getNextSample() noexcept
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{
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auto currentSample = std::sin (currentAngle);
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updateAngle();
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return currentSample;
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}
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private:
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float currentAngle = 0.0f, angleDelta = 0.0f;
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};
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//==============================================================================
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class MainContentComponent : public juce::AudioAppComponent,
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public juce::Timer
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{
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public:
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MainContentComponent()
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{
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cpuUsageLabel.setText ("CPU Usage", juce::dontSendNotification);
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cpuUsageText.setJustificationType (juce::Justification::right);
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addAndMakeVisible (cpuUsageLabel);
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addAndMakeVisible (cpuUsageText);
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setSize (400, 200);
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setAudioChannels (0, 2); // no inputs, two outputs
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startTimer (50);
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}
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~MainContentComponent() override
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{
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shutdownAudio();
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}
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void resized() override
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{
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cpuUsageLabel.setBounds (10, 10, getWidth() - 20, 20);
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cpuUsageText .setBounds (10, 10, getWidth() - 20, 20);
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}
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void timerCallback() override
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{
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auto cpu = deviceManager.getCpuUsage() * 100;
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cpuUsageText.setText (juce::String (cpu, 6) + " %", juce::dontSendNotification);
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}
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void prepareToPlay (int, double sampleRate) override
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{
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auto numberOfOscillators = 200; // [1]
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for (auto i = 0; i < numberOfOscillators; ++i)
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{
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auto* oscillator = new SineOscillator(); // [2]
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auto midiNote = juce::Random::getSystemRandom().nextDouble() * 36.0 + 48.0; // [3]
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auto frequency = 440.0 * pow (2.0, (midiNote - 69.0) / 12.0); // [4]
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oscillator->setFrequency ((float) frequency, (float) sampleRate); // [5]
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oscillators.add (oscillator);
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}
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level = 0.25f / (float) numberOfOscillators; // [6]
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}
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void releaseResources() override {}
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void getNextAudioBlock (const juce::AudioSourceChannelInfo& bufferToFill) override
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{
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auto* leftBuffer = bufferToFill.buffer->getWritePointer (0, bufferToFill.startSample); // [7]
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auto* rightBuffer = bufferToFill.buffer->getWritePointer (1, bufferToFill.startSample);
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bufferToFill.clearActiveBufferRegion();
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for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
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{
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auto* oscillator = oscillators.getUnchecked (oscillatorIndex); // [8]
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for (auto sample = 0; sample < bufferToFill.numSamples; ++sample)
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{
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auto levelSample = oscillator->getNextSample() * level; // [9]
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leftBuffer[sample] += levelSample; // [10]
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rightBuffer[sample] += levelSample;
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}
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}
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}
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private:
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juce::Label cpuUsageLabel;
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juce::Label cpuUsageText;
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float level = 0.0f;
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juce::OwnedArray<SineOscillator> oscillators;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
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};
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@@ -0,0 +1,196 @@
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/*
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||||
==============================================================================
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||||
|
||||
This file is part of the JUCE tutorials.
|
||||
Copyright (c) 2020 - Raw Material Software Limited
|
||||
|
||||
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
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name: WavetableSynthTutorial
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version: 2.0.0
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vendor: JUCE
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website: http://juce.com
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description: Wavetable synthesiser.
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dependencies: juce_audio_basics, juce_audio_devices, juce_audio_formats,
|
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juce_audio_processors, juce_audio_utils, juce_core,
|
||||
juce_data_structures, juce_events, juce_graphics,
|
||||
juce_gui_basics, juce_gui_extra
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||||
exporters: xcode_mac, vs2019, linux_make
|
||||
|
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type: Component
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mainClass: MainContentComponent
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useLocalCopy: 1
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END_JUCE_PIP_METADATA
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*******************************************************************************/
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#pragma once
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//==============================================================================
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class WavetableOscillator
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{
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public:
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WavetableOscillator (const juce::AudioSampleBuffer& wavetableToUse)
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: wavetable (wavetableToUse)
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{
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jassert (wavetable.getNumChannels() == 1);
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}
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void setFrequency (float frequency, float sampleRate)
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{
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auto tableSizeOverSampleRate = (float) wavetable.getNumSamples() / sampleRate;
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tableDelta = frequency * tableSizeOverSampleRate;
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}
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forcedinline float getNextSample() noexcept
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{
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auto tableSize = (unsigned int) wavetable.getNumSamples();
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auto index0 = (unsigned int) currentIndex; // [6]
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auto index1 = index0 == (tableSize - 1) ? (unsigned int) 0 : index0 + 1;
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auto frac = currentIndex - (float) index0; // [7]
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auto* table = wavetable.getReadPointer (0); // [8]
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auto value0 = table[index0];
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auto value1 = table[index1];
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auto currentSample = value0 + frac * (value1 - value0); // [9]
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if ((currentIndex += tableDelta) > (float) tableSize) // [10]
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currentIndex -= (float) tableSize;
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return currentSample;
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}
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private:
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const juce::AudioSampleBuffer& wavetable;
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float currentIndex = 0.0f, tableDelta = 0.0f;
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};
|
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|
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//==============================================================================
|
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class MainContentComponent : public juce::AudioAppComponent,
|
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public juce::Timer
|
||||
{
|
||||
public:
|
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MainContentComponent()
|
||||
{
|
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cpuUsageLabel.setText ("CPU Usage", juce::dontSendNotification);
|
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cpuUsageText.setJustificationType (juce::Justification::right);
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addAndMakeVisible (cpuUsageLabel);
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addAndMakeVisible (cpuUsageText);
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createWavetable();
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setSize (400, 200);
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setAudioChannels (0, 2); // no inputs, two outputs
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startTimer (50);
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}
|
||||
|
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~MainContentComponent() override
|
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{
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shutdownAudio();
|
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}
|
||||
|
||||
void resized() override
|
||||
{
|
||||
cpuUsageLabel.setBounds (10, 10, getWidth() - 20, 20);
|
||||
cpuUsageText .setBounds (10, 10, getWidth() - 20, 20);
|
||||
}
|
||||
|
||||
void timerCallback() override
|
||||
{
|
||||
auto cpu = deviceManager.getCpuUsage() * 100;
|
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cpuUsageText.setText (juce::String (cpu, 6) + " %", juce::dontSendNotification);
|
||||
}
|
||||
|
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void createWavetable()
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{
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sineTable.setSize (1, (int) tableSize);
|
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auto* samples = sineTable.getWritePointer (0); // [3]
|
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|
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auto angleDelta = juce::MathConstants<double>::twoPi / (double) (tableSize - 1); // [4]
|
||||
auto currentAngle = 0.0;
|
||||
|
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for (unsigned int i = 0; i < tableSize; ++i)
|
||||
{
|
||||
auto sample = std::sin (currentAngle); // [5]
|
||||
samples[i] = (float) sample;
|
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currentAngle += angleDelta;
|
||||
}
|
||||
}
|
||||
|
||||
void prepareToPlay (int, double sampleRate) override
|
||||
{
|
||||
auto numberOfOscillators = 200;
|
||||
|
||||
for (auto i = 0; i < numberOfOscillators; ++i)
|
||||
{
|
||||
auto* oscillator = new WavetableOscillator (sineTable);
|
||||
|
||||
auto midiNote = juce::Random::getSystemRandom().nextDouble() * 36.0 + 48.0;
|
||||
auto frequency = 440.0 * pow (2.0, (midiNote - 69.0) / 12.0);
|
||||
|
||||
oscillator->setFrequency ((float) frequency, (float) sampleRate);
|
||||
oscillators.add (oscillator);
|
||||
}
|
||||
|
||||
level = 0.25f / (float) numberOfOscillators;
|
||||
}
|
||||
|
||||
void releaseResources() override {}
|
||||
|
||||
void getNextAudioBlock (const juce::AudioSourceChannelInfo& bufferToFill) override
|
||||
{
|
||||
auto* leftBuffer = bufferToFill.buffer->getWritePointer (0, bufferToFill.startSample);
|
||||
auto* rightBuffer = bufferToFill.buffer->getWritePointer (1, bufferToFill.startSample);
|
||||
|
||||
bufferToFill.clearActiveBufferRegion();
|
||||
|
||||
for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
|
||||
{
|
||||
auto* oscillator = oscillators.getUnchecked (oscillatorIndex);
|
||||
|
||||
for (auto sample = 0; sample < bufferToFill.numSamples; ++sample)
|
||||
{
|
||||
auto levelSample = oscillator->getNextSample() * level;
|
||||
|
||||
leftBuffer[sample] += levelSample;
|
||||
rightBuffer[sample] += levelSample;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
juce::Label cpuUsageLabel;
|
||||
juce::Label cpuUsageText;
|
||||
|
||||
const unsigned int tableSize = 1 << 7; // [2]
|
||||
float level = 0.0f;
|
||||
|
||||
juce::AudioSampleBuffer sineTable; // [1]
|
||||
juce::OwnedArray<WavetableOscillator> oscillators;
|
||||
|
||||
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
|
||||
};
|
||||
@@ -0,0 +1,198 @@
|
||||
/*
|
||||
==============================================================================
|
||||
|
||||
This file is part of the JUCE tutorials.
|
||||
Copyright (c) 2020 - Raw Material Software Limited
|
||||
|
||||
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: WavetableSynthTutorial
|
||||
version: 3.0.0
|
||||
vendor: JUCE
|
||||
website: http://juce.com
|
||||
description: Wavetable synthesiser.
|
||||
|
||||
dependencies: juce_audio_basics, juce_audio_devices, juce_audio_formats,
|
||||
juce_audio_processors, juce_audio_utils, juce_core,
|
||||
juce_data_structures, juce_events, juce_graphics,
|
||||
juce_gui_basics, juce_gui_extra
|
||||
exporters: xcode_mac, vs2019, linux_make
|
||||
|
||||
type: Component
|
||||
mainClass: MainContentComponent
|
||||
|
||||
useLocalCopy: 1
|
||||
|
||||
END_JUCE_PIP_METADATA
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
|
||||
#pragma once
|
||||
|
||||
//==============================================================================
|
||||
class WavetableOscillator
|
||||
{
|
||||
public:
|
||||
WavetableOscillator (const juce::AudioSampleBuffer& wavetableToUse)
|
||||
: wavetable (wavetableToUse),
|
||||
tableSize (wavetable.getNumSamples() - 1)
|
||||
{
|
||||
jassert (wavetable.getNumChannels() == 1);
|
||||
}
|
||||
|
||||
void setFrequency (float frequency, float sampleRate)
|
||||
{
|
||||
auto tableSizeOverSampleRate = (float) tableSize / sampleRate;
|
||||
tableDelta = frequency * tableSizeOverSampleRate;
|
||||
}
|
||||
|
||||
forcedinline float getNextSample() noexcept
|
||||
{
|
||||
auto index0 = (unsigned int) currentIndex;
|
||||
auto index1 = index0 + 1;
|
||||
|
||||
auto frac = currentIndex - (float) index0;
|
||||
|
||||
auto* table = wavetable.getReadPointer (0);
|
||||
auto value0 = table[index0];
|
||||
auto value1 = table[index1];
|
||||
|
||||
auto currentSample = value0 + frac * (value1 - value0);
|
||||
|
||||
if ((currentIndex += tableDelta) > (float) tableSize)
|
||||
currentIndex -= (float) tableSize;
|
||||
|
||||
return currentSample;
|
||||
}
|
||||
|
||||
private:
|
||||
const juce::AudioSampleBuffer& wavetable;
|
||||
const int tableSize;
|
||||
float currentIndex = 0.0f, tableDelta = 0.0f;
|
||||
};
|
||||
|
||||
//==============================================================================
|
||||
class MainContentComponent : public juce::AudioAppComponent,
|
||||
public juce::Timer
|
||||
{
|
||||
public:
|
||||
MainContentComponent()
|
||||
{
|
||||
cpuUsageLabel.setText ("CPU Usage", juce::dontSendNotification);
|
||||
cpuUsageText.setJustificationType (juce::Justification::right);
|
||||
addAndMakeVisible (cpuUsageLabel);
|
||||
addAndMakeVisible (cpuUsageText);
|
||||
|
||||
createWavetable();
|
||||
|
||||
setSize (400, 200);
|
||||
setAudioChannels (0, 2); // no inputs, two outputs
|
||||
startTimer (50);
|
||||
}
|
||||
|
||||
~MainContentComponent() override
|
||||
{
|
||||
shutdownAudio();
|
||||
}
|
||||
|
||||
void resized() override
|
||||
{
|
||||
cpuUsageLabel.setBounds (10, 10, getWidth() - 20, 20);
|
||||
cpuUsageText .setBounds (10, 10, getWidth() - 20, 20);
|
||||
}
|
||||
|
||||
void timerCallback() override
|
||||
{
|
||||
auto cpu = deviceManager.getCpuUsage() * 100;
|
||||
cpuUsageText.setText (juce::String (cpu, 6) + " %", juce::dontSendNotification);
|
||||
}
|
||||
|
||||
void createWavetable()
|
||||
{
|
||||
sineTable.setSize (1, (int) tableSize + 1);
|
||||
auto* samples = sineTable.getWritePointer (0);
|
||||
|
||||
auto angleDelta = juce::MathConstants<double>::twoPi / (double) (tableSize - 1);
|
||||
auto currentAngle = 0.0;
|
||||
|
||||
for (unsigned int i = 0; i < tableSize; ++i)
|
||||
{
|
||||
auto sample = std::sin (currentAngle);
|
||||
samples[i] = (float) sample;
|
||||
currentAngle += angleDelta;
|
||||
}
|
||||
|
||||
samples[tableSize] = samples[0];
|
||||
}
|
||||
|
||||
void prepareToPlay (int, double sampleRate) override
|
||||
{
|
||||
auto numberOfOscillators = 200;
|
||||
|
||||
for (auto i = 0; i < numberOfOscillators; ++i)
|
||||
{
|
||||
auto* oscillator = new WavetableOscillator (sineTable);
|
||||
|
||||
auto midiNote = juce::Random::getSystemRandom().nextDouble() * 36.0 + 48.0;
|
||||
auto frequency = 440.0 * pow (2.0, (midiNote - 69.0) / 12.0);
|
||||
|
||||
oscillator->setFrequency ((float) frequency, (float) sampleRate);
|
||||
oscillators.add (oscillator);
|
||||
}
|
||||
|
||||
level = 0.25f / (float) numberOfOscillators;
|
||||
}
|
||||
|
||||
void releaseResources() override {}
|
||||
|
||||
void getNextAudioBlock (const juce::AudioSourceChannelInfo& bufferToFill) override
|
||||
{
|
||||
auto* leftBuffer = bufferToFill.buffer->getWritePointer (0, bufferToFill.startSample);
|
||||
auto* rightBuffer = bufferToFill.buffer->getWritePointer (1, bufferToFill.startSample);
|
||||
|
||||
bufferToFill.clearActiveBufferRegion();
|
||||
|
||||
for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
|
||||
{
|
||||
auto* oscillator = oscillators.getUnchecked (oscillatorIndex);
|
||||
|
||||
for (auto sample = 0; sample < bufferToFill.numSamples; ++sample)
|
||||
{
|
||||
auto levelSample = oscillator->getNextSample() * level;
|
||||
|
||||
leftBuffer[sample] += levelSample;
|
||||
rightBuffer[sample] += levelSample;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
juce::Label cpuUsageLabel;
|
||||
juce::Label cpuUsageText;
|
||||
|
||||
const unsigned int tableSize = 1 << 7;
|
||||
float level = 0.0f;
|
||||
|
||||
juce::AudioSampleBuffer sineTable;
|
||||
juce::OwnedArray<WavetableOscillator> oscillators;
|
||||
|
||||
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
|
||||
};
|
||||
@@ -0,0 +1,208 @@
|
||||
/*
|
||||
==============================================================================
|
||||
|
||||
This file is part of the JUCE tutorials.
|
||||
Copyright (c) 2020 - Raw Material Software Limited
|
||||
|
||||
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: WavetableSynthTutorial
|
||||
version: 4.0.0
|
||||
vendor: JUCE
|
||||
website: http://juce.com
|
||||
description: Wavetable synthesiser.
|
||||
|
||||
dependencies: juce_audio_basics, juce_audio_devices, juce_audio_formats,
|
||||
juce_audio_processors, juce_audio_utils, juce_core,
|
||||
juce_data_structures, juce_events, juce_graphics,
|
||||
juce_gui_basics, juce_gui_extra
|
||||
exporters: xcode_mac, vs2019, linux_make
|
||||
|
||||
type: Component
|
||||
mainClass: MainContentComponent
|
||||
|
||||
useLocalCopy: 1
|
||||
|
||||
END_JUCE_PIP_METADATA
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
|
||||
#pragma once
|
||||
|
||||
//==============================================================================
|
||||
class WavetableOscillator
|
||||
{
|
||||
public:
|
||||
WavetableOscillator (const juce::AudioSampleBuffer& wavetableToUse)
|
||||
: wavetable (wavetableToUse),
|
||||
tableSize (wavetable.getNumSamples() - 1)
|
||||
{
|
||||
jassert (wavetable.getNumChannels() == 1);
|
||||
}
|
||||
|
||||
void setFrequency (float frequency, float sampleRate)
|
||||
{
|
||||
auto tableSizeOverSampleRate = (float) tableSize / sampleRate;
|
||||
tableDelta = frequency * tableSizeOverSampleRate;
|
||||
}
|
||||
|
||||
forcedinline float getNextSample() noexcept
|
||||
{
|
||||
auto index0 = (unsigned int) currentIndex;
|
||||
auto index1 = index0 + 1;
|
||||
|
||||
auto frac = currentIndex - (float) index0;
|
||||
|
||||
auto* table = wavetable.getReadPointer (0);
|
||||
auto value0 = table[index0];
|
||||
auto value1 = table[index1];
|
||||
|
||||
auto currentSample = value0 + frac * (value1 - value0);
|
||||
|
||||
if ((currentIndex += tableDelta) > (float) tableSize)
|
||||
currentIndex -= (float) tableSize;
|
||||
|
||||
return currentSample;
|
||||
}
|
||||
|
||||
private:
|
||||
const juce::AudioSampleBuffer& wavetable;
|
||||
const int tableSize;
|
||||
float currentIndex = 0.0f, tableDelta = 0.0f;
|
||||
};
|
||||
|
||||
//==============================================================================
|
||||
class MainContentComponent : public juce::AudioAppComponent,
|
||||
public juce::Timer
|
||||
{
|
||||
public:
|
||||
MainContentComponent()
|
||||
{
|
||||
cpuUsageLabel.setText ("CPU Usage", juce::dontSendNotification);
|
||||
cpuUsageText.setJustificationType (juce::Justification::right);
|
||||
addAndMakeVisible (cpuUsageLabel);
|
||||
addAndMakeVisible (cpuUsageText);
|
||||
|
||||
createWavetable();
|
||||
|
||||
setSize (400, 200);
|
||||
setAudioChannels (0, 2); // no inputs, two outputs
|
||||
startTimer (50);
|
||||
}
|
||||
|
||||
~MainContentComponent() override
|
||||
{
|
||||
shutdownAudio();
|
||||
}
|
||||
|
||||
void resized() override
|
||||
{
|
||||
cpuUsageLabel.setBounds (10, 10, getWidth() - 20, 20);
|
||||
cpuUsageText .setBounds (10, 10, getWidth() - 20, 20);
|
||||
}
|
||||
|
||||
void timerCallback() override
|
||||
{
|
||||
auto cpu = deviceManager.getCpuUsage() * 100;
|
||||
cpuUsageText.setText (juce::String (cpu, 6) + " %", juce::dontSendNotification);
|
||||
}
|
||||
|
||||
void createWavetable()
|
||||
{
|
||||
sineTable.setSize (1, (int) tableSize + 1);
|
||||
sineTable.clear();
|
||||
|
||||
auto* samples = sineTable.getWritePointer (0);
|
||||
|
||||
int harmonics[] = { 1, 3, 5, 6, 7, 9, 13, 15 };
|
||||
float harmonicWeights[] = { 0.5f, 0.1f, 0.05f, 0.125f, 0.09f, 0.005f, 0.002f, 0.001f }; // [1]
|
||||
|
||||
jassert (juce::numElementsInArray (harmonics) == juce::numElementsInArray (harmonicWeights));
|
||||
|
||||
for (auto harmonic = 0; harmonic < juce::numElementsInArray (harmonics); ++harmonic)
|
||||
{
|
||||
auto angleDelta = juce::MathConstants<double>::twoPi / (double) (tableSize - 1) * harmonics[harmonic]; // [2]
|
||||
auto currentAngle = 0.0;
|
||||
|
||||
for (unsigned int i = 0; i < tableSize; ++i)
|
||||
{
|
||||
auto sample = std::sin (currentAngle);
|
||||
samples[i] += (float) sample * harmonicWeights[harmonic]; // [3]
|
||||
currentAngle += angleDelta;
|
||||
}
|
||||
}
|
||||
|
||||
samples[tableSize] = samples[0];
|
||||
}
|
||||
|
||||
void prepareToPlay (int, double sampleRate) override
|
||||
{
|
||||
auto numberOfOscillators = 10;
|
||||
|
||||
for (auto i = 0; i < numberOfOscillators; ++i)
|
||||
{
|
||||
auto* oscillator = new WavetableOscillator (sineTable);
|
||||
|
||||
auto midiNote = juce::Random::getSystemRandom().nextDouble() * 36.0 + 48.0;
|
||||
auto frequency = 440.0 * pow (2.0, (midiNote - 69.0) / 12.0);
|
||||
|
||||
oscillator->setFrequency ((float) frequency, (float) sampleRate);
|
||||
oscillators.add (oscillator);
|
||||
}
|
||||
|
||||
level = 0.25f / (float) numberOfOscillators;
|
||||
}
|
||||
|
||||
void releaseResources() override {}
|
||||
|
||||
void getNextAudioBlock (const juce::AudioSourceChannelInfo& bufferToFill) override
|
||||
{
|
||||
auto* leftBuffer = bufferToFill.buffer->getWritePointer (0, bufferToFill.startSample);
|
||||
auto* rightBuffer = bufferToFill.buffer->getWritePointer (1, bufferToFill.startSample);
|
||||
|
||||
bufferToFill.clearActiveBufferRegion();
|
||||
|
||||
for (auto oscillatorIndex = 0; oscillatorIndex < oscillators.size(); ++oscillatorIndex)
|
||||
{
|
||||
auto* oscillator = oscillators.getUnchecked (oscillatorIndex);
|
||||
|
||||
for (auto sample = 0; sample < bufferToFill.numSamples; ++sample)
|
||||
{
|
||||
auto levelSample = oscillator->getNextSample() * level;
|
||||
|
||||
leftBuffer[sample] += levelSample;
|
||||
rightBuffer[sample] += levelSample;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private:
|
||||
juce::Label cpuUsageLabel;
|
||||
juce::Label cpuUsageText;
|
||||
|
||||
const unsigned int tableSize = 1 << 7;
|
||||
float level = 0.0f;
|
||||
|
||||
juce::AudioSampleBuffer sineTable;
|
||||
juce::OwnedArray<WavetableOscillator> oscillators;
|
||||
|
||||
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
|
||||
};
|
||||
Reference in New Issue
Block a user