SoundManager.java

/*
* Authors: Jerry Li & Victor Jiang
* Date: June 13, 2025
* Description: This class plays background music and sound effects
*/

import java.io.File;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.FloatControl;

public class SoundManager {

    public Clip currentMusicClip; // To track the currently playing background music
    public String currentTrack; // To track which track is currently playing

    // Constructor
    public SoundManager() {
        currentMusicClip = null;
        currentTrack = "";
    }

    // Method to stop the currently playing background music
    public void stopBackgroundMusic() {
        if (currentMusicClip != null && currentMusicClip.isRunning()) {
            currentMusicClip.stop();
            currentMusicClip.close();
        }
    }

    // Play background music in loop
    public void playBackgroundMusic(String track) {
        // If this track is already playing, do nothing
        if (track.equals(currentTrack) && currentMusicClip != null && currentMusicClip.isRunning()) {
            return;
        }

        // Stop any currently playing music
        stopBackgroundMusic();

        File audio_file = null;
        AudioInputStream audio_stream = null;
        FloatControl volumeControl = null;
        float volumeLevel = 0f;

        try {
            // Load the audio file from the specified path
            audio_file = new File("./assets/music/" + track + ".wav");
            if (!audio_file.exists()) {
                System.err.println("Audio file not found: " + audio_file.getAbsolutePath());
                return;
            }

            audio_stream = AudioSystem.getAudioInputStream(audio_file);
            // Create a Clip object to play the audio
            currentMusicClip = AudioSystem.getClip();
            currentMusicClip.open(audio_stream);

            // Set the clip to loop continuously
            currentMusicClip.loop(Clip.LOOP_CONTINUOUSLY);
            // Adjust the volume of the audio using a FloatControl
            volumeControl = (FloatControl) currentMusicClip.getControl(FloatControl.Type.MASTER_GAIN);
            // Set appropriate volume level - reduced from -15.0f to -10.0f to make it more audible
            volumeLevel = track.equals("gameplay") ? -10.0f : -12.0f; // Gameplay music slightly louder
            volumeControl.setValue(volumeLevel);

            // Start playing the audio
            currentMusicClip.start();

            // Keep track of the current track
            currentTrack = track;
        } catch (Exception e) {
            System.out.println("An error occurred while playing background music: " + e.getMessage());
            e.printStackTrace();
        } finally {
            if (audio_stream != null) {
                try {
                    audio_stream.close();
                } catch (Exception ignored) {
                }
            }
        }
    }
}