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* Copyright (c) 2008, 2014, Oracle and/or its affiliates.
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*
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package ensemble.samples.charts.bar.audio;
import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.media.AudioSpectrumListener;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;
/**
* Bar chart that shows audio spectrum of a music file being played.
*
* @sampleName Audio Bar Chart
* @preview preview.png
* @see javafx.scene.chart.BarChart
* @see javafx.scene.chart.Chart
* @see javafx.scene.chart.CategoryAxis
* @see javafx.scene.chart.NumberAxis
* @see javafx.scene.chart.XYChart
* @see javafx.scene.media.AudioSpectrumListener
* @see javafx.scene.media.Media
* @see javafx.scene.media.MediaPlayer
* @conditionalFeatures WEB, MEDIA
*/
public class AudioBarChartApp extends Application {
private XYChart.Data[] series1Data;
private AudioSpectrumListener audioSpectrumListener;
private static final String AUDIO_URI = System.getProperty("demo.audio.url",
"http://download.oracle.com/otndocs/products/javafx/oow2010-2.flv");
private MediaPlayer audioMediaPlayer;
private static final boolean PLAY_AUDIO = Boolean.parseBoolean(
System.getProperty("demo.play.audio", "true"));
public AudioBarChartApp() {
audioSpectrumListener = (double timestamp, double duration, float[] magnitudes, float[] phases) -> {
for (int i = 0; i < series1Data.length; i++) {
series1Data[i].setYValue(magnitudes[i] + 60);
}
};
}
public void play() {
this.startAudio();
}
@Override
public void stop() {
this.stopAudio();
}
public Parent createContent() {
final CategoryAxis xAxis = new CategoryAxis();
final NumberAxis yAxis = new NumberAxis(0, 50, 10);
final BarChart bc = new BarChart<>(xAxis, yAxis);
bc.getStylesheets().add(AudioBarChartApp.class.getResource("AudioBarChart.css").toExternalForm());
bc.setLegendVisible(false);
bc.setAnimated(false);
bc.setBarGap(0);
bc.setCategoryGap(1);
bc.setVerticalGridLinesVisible(false);
// setup chart
bc.setTitle("Live Audio Spectrum Data");
xAxis.setLabel("Frequency Bands");
yAxis.setLabel("Magnitudes");
yAxis.setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis, null, "dB"));
// add starting data
XYChart.Series series1 = new XYChart.Series<>();
series1.setName("Data Series 1");
//noinspection unchecked
series1Data = new XYChart.Data[128];
String[] categories = new String[128];
for (int i = 0; i < series1Data.length; i++) {
categories[i] = Integer.toString(i + 1);
series1Data[i] = new XYChart.Data(categories[i], 50);
series1.getData().add(series1Data[i]);
}
bc.getData().add(series1);
return bc;
}
private void startAudio() {
if (PLAY_AUDIO) {
getAudioMediaPlayer()
.setAudioSpectrumListener(audioSpectrumListener);
getAudioMediaPlayer().play();
}
}
private void stopAudio() {
if (getAudioMediaPlayer().getAudioSpectrumListener() == audioSpectrumListener) {
getAudioMediaPlayer().pause();
}
}
private MediaPlayer getAudioMediaPlayer() {
if (audioMediaPlayer == null) {
Media audioMedia = new Media(AUDIO_URI);
audioMediaPlayer = new MediaPlayer(audioMedia);
audioMediaPlayer.setCycleCount(MediaPlayer.INDEFINITE);
}
return audioMediaPlayer;
}
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setScene(new Scene(createContent()));
primaryStage.show();
play();
}
/**
* Java main for when running without JavaFX launcher
* @param args command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
