147 lines
4.1 KiB
C++
147 lines
4.1 KiB
C++
#include "../JuceLibraryCode/JuceHeader.h"
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enum State {
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Done,
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Start,
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Play,
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Stop
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};
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class MainContentComponent : public AudioAppComponent,
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public ChangeListener,
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public Button::Listener {
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public:
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MainContentComponent() : state(Done) {
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addAndMakeVisible(&openbtn);
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openbtn.setButtonText("Open");
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openbtn.addListener(this);
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addAndMakeVisible(&playbtn);
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playbtn.setButtonText("Play");
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playbtn.addListener(this);
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playbtn.setColour(TextButton::buttonColourId, Colours::green);
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playbtn.setEnabled(false);
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addAndMakeVisible (&stopbtn);
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stopbtn.setButtonText("Stop");
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stopbtn.addListener(this);
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stopbtn.setColour(TextButton::buttonColourId, Colours::red);
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stopbtn.setEnabled(false);
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formatManager.registerBasicFormats();
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transportSource.addChangeListener(this);
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setSize(300, 200);
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setAudioChannels(0, 2);
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}
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~MainContentComponent() {
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shutdownAudio();
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}
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void changeListenerCallback(ChangeBroadcaster* source) override {
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if (source == &transportSource) {
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if (transportSource.isPlaying()) changeState(Play);
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else changeState(Done);
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}
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}
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void prepareToPlay(int s, double r) override {
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transportSource.prepareToPlay(s, r);
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}
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void getNextAudioBlock(const AudioSourceChannelInfo& buf) override {
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if (readerSource == nullptr) {
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buf.clearActiveBufferRegion();
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return;
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}
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transportSource.getNextAudioBlock(buf);
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}
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void releaseResources() override {
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transportSource.releaseResources();
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}
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void paint (Graphics& g) override {
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g.fillAll(getLookAndFeel().findColour(ResizableWindow::backgroundColourId));
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}
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void resized() override {
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openbtn.setBounds(10, 10, getWidth() - 20, 20);
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playbtn.setBounds(10, 40, getWidth() - 20, 20);
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stopbtn.setBounds (10, 70, getWidth() - 20, 20);
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}
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private:
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
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TextButton openbtn;
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TextButton playbtn;
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TextButton stopbtn;
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AudioFormatManager formatManager;
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ScopedPointer<AudioFormatReaderSource> readerSource;
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AudioTransportSource transportSource;
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State state;
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void changeState(State news) {
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if (state == news) return;
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state = news;
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switch (state) {
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case Done:
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stopbtn.setEnabled(false);
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playbtn.setEnabled(true);
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transportSource.setPosition (0.0);
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break;
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case Start:
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playbtn.setEnabled (false);
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transportSource.start();
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break;
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case Play:
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stopbtn.setEnabled (true);
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break;
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case Stop:
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transportSource.stop();
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break;
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}
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}
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void buttonClicked(Button* button) override {
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if (button == &openbtn) openClicked();
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if (button == &playbtn) playClicked();
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if (button == &stopbtn) stopClicked();
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}
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void openClicked() {
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FileChooser chooser ("Select a file", File::nonexistent, "*.wav");
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if (!chooser.browseForFileToOpen()) return;
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File file(chooser.getResult());
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AudioFormatReader* reader = formatManager.createReaderFor(file);
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if (reader == nullptr) return;
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ScopedPointer<AudioFormatReaderSource> news = new AudioFormatReaderSource(reader, true);
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transportSource.setSource(news, 0, nullptr, reader->sampleRate);
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playbtn.setEnabled(true);
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readerSource = news.release();
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}
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void playClicked() {
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changeState(Start);
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}
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void stopClicked() {
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changeState(Stop);
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}
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};
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Component* createMainContentComponent() { return new MainContentComponent(); }
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