feat: music & sound!!!

src/main/java/eu/midnightdust/yaytris/util/SoundUtil.java

@@ -0,0 +1,108 @@
+package eu.midnightdust.yaytris.util;
+
+import eu.midnightdust.yaytris.Settings;
+
+import javax.sound.sampled.*;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class SoundUtil {
+    private static final Map<String, MusicThread> musicThreads = new HashMap<>();
+
+    public static void playMusic(String fileLocation, boolean looped) {
+        if (musicThreads.containsKey(fileLocation)) stopMusic(fileLocation);
+        MusicThread musicThread = new MusicThread(fileLocation, looped);
+        musicThread.start();
+        musicThreads.put(fileLocation, musicThread);
+    }
+
+    public static void stopMusic(String fileLocation) {
+        if (musicThreads.containsKey(fileLocation)) musicThreads.get(fileLocation).stopMusic();
+    }
+
+    // Adapted from: https://www.baeldung.com/java-play-sound
+    public static void playSoundClip(String fileLocation) {
+        try (AudioInputStream stream = AudioSystem.getAudioInputStream(SoundUtil.class.getResource(fileLocation))) { // FIXME: Support audio files from JAR. File streams won't work here for some reason.
+            AudioFormat format = stream.getFormat();
+            DataLine.Info info = new DataLine.Info(Clip.class, format);
+
+            Clip audioClip = (Clip) AudioSystem.getLine(info);
+            audioClip.addLineListener(new LineUpdateListener());
+            audioClip.open(stream);
+            audioClip.start();
+            setVolume(audioClip, Settings.soundVolume);
+        } catch (LineUnavailableException | IOException | UnsupportedAudioFileException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    // Adapted from: https://stackoverflow.com/a/40698149
+    private static void setVolume(Line line, int volume) {
+        if (volume < 0 || volume > 100)
+            throw new IllegalArgumentException("Volume not valid: " + volume);
+        FloatControl gainControl = (FloatControl) line.getControl(FloatControl.Type.MASTER_GAIN);
+        gainControl.setValue(20f * (float) Math.log10(volume/100f));
+    }
+
+    public static class MusicThread extends Thread {
+        private static final int BUFFER_SIZE = 8192;
+        private final boolean looped;
+        private final String fileLocation;
+        private boolean playing;
+
+        MusicThread(String fileLocation, boolean looped) {
+            this.fileLocation = fileLocation;
+            this.looped = looped;
+            this.playing = true;
+        }
+
+        public void stopMusic() {
+            this.playing = false;
+        }
+
+        @Override
+        public void run() {
+            do {playMusic(fileLocation);} while (looped && playing);
+        }
+
+        // Adapted from: https://www.baeldung.com/java-play-sound
+        private void playMusic(String fileLocation) {
+            try (AudioInputStream stream = AudioSystem.getAudioInputStream(SoundUtil.class.getResource(fileLocation))) {
+                AudioFormat format = stream.getFormat();
+                DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
+
+                SourceDataLine sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
+                sourceDataLine.open(format);
+                sourceDataLine.start();
+                setVolume(sourceDataLine, Settings.musicVolume);
+                float fadeOut = 1.0f;
+
+                byte[] bufferBytes = new byte[BUFFER_SIZE];
+                int readBytes;
+                while ((readBytes = stream.read(bufferBytes)) != -1) {
+                    if (!playing) {
+                        fadeOut = (float) Math.sin(fadeOut-0.01f); // Sinus fade-out
+                        setVolume(sourceDataLine, (int) (fadeOut * Settings.musicVolume));
+                        if (fadeOut <= 0) break;
+                    }
+                    sourceDataLine.write(bufferBytes, 0, readBytes);
+                }
+
+                sourceDataLine.drain();
+                sourceDataLine.close();
+            } catch (LineUnavailableException | IOException | UnsupportedAudioFileException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    public static class LineUpdateListener implements LineListener {
+        @Override
+        public void update(LineEvent event) {
+            if (LineEvent.Type.STOP == event.getType()) {
+                event.getLine().close();
+            }
+        }
+    }
+}