/*
* Return data as a byte array.
*/
private static byte[] readByte(String filename) {
byte[] data = null;
AudioInputStream ais = null;
try {
// try to read from file
File file = new File(filename);
if (file.exists()) {
ais = AudioSystem.getAudioInputStream(file);
data = new byte[ais.available()];
ais.read(data);
}
// try to read from URL
else {
URL url = StdAudio.class.getResource(filename);
ais = AudioSystem.getAudioInputStream(url);
data = new byte[ais.available()];
ais.read(data);
}
} catch (Exception e) {
System.out.println(e.getMessage());
throw new RuntimeException("Could not read " + filename);
}
return data;
}
/** Save the double array as a sound file (using .wav or .au format). */
public static void save(String filename, double[] input) {
// assumes 44,100 samples per second
// use 16-bit audio, mono, signed PCM, little Endian
AudioFormat format = new AudioFormat(SAMPLE_RATE, 16, 1, true, false);
byte[] data = new byte[2 * input.length];
for (int i = 0; i < input.length; i++) {
int temp = (short) (input[i] * MAX_16_BIT);
data[2 * i + 0] = (byte) temp;
data[2 * i + 1] = (byte) (temp >> 8);
}
// now save the file
try {
ByteArrayInputStream bais = new ByteArrayInputStream(data);
AudioInputStream ais = new AudioInputStream(bais, format, input.length);
if (filename.endsWith(".wav") || filename.endsWith(".WAV")) {
AudioSystem.write(ais, AudioFileFormat.Type.WAVE, new File(filename));
} else if (filename.endsWith(".au") || filename.endsWith(".AU")) {
AudioSystem.write(ais, AudioFileFormat.Type.AU, new File(filename));
} else {
throw new RuntimeException("File format not supported: " + filename);
}
} catch (Exception e) {
System.out.println(e);
System.exit(1);
}
}
public void openSound() {
if (!sound.isOpen()) {
try {
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(soundPath);
sound = AudioSystem.getClip();
sound.open(audioInputStream);
} catch (Exception e) {
System.out.println("The sound from file " + String.valueOf(soundPath) + "was not found!");
System.out.println(e);
}
}
}
Sound(URL soundPath, float gain) {
this.soundPath = soundPath;
try {
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(soundPath);
sound = AudioSystem.getClip();
sound.open(audioInputStream);
gainControl = (FloatControl) sound.getControl(FloatControl.Type.MASTER_GAIN);
gainControl.setValue(gain);
} catch (Exception e) {
System.out.println("The sound from file " + String.valueOf(soundPath) + "was not found!");
System.out.println(e);
} // Satisfy the catch
}
// open up an audio stream
private static void init() {
try {
// 44,100 samples per second, 16-bit audio, mono, signed PCM, little
// Endian
AudioFormat format = new AudioFormat((float) SAMPLE_RATE, BITS_PER_SAMPLE, 1, true, false);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
line = (SourceDataLine) AudioSystem.getLine(info);
line.open(format, SAMPLE_BUFFER_SIZE * BYTES_PER_SAMPLE);
// the internal buffer is a fraction of the actual buffer size, this
// choice is arbitrary
// it gets divided because we can't expect the buffered data to line
// up exactly with when
// the sound card decides to push out its samples.
buffer = new byte[SAMPLE_BUFFER_SIZE * BYTES_PER_SAMPLE / 3];
listeners = new HashSet<AudioEventListener>();
} catch (Exception e) {
System.err.println("Error initializing StdAudio audio system:");
e.printStackTrace();
System.exit(1);
}
// no sound gets made before this call
line.start();
}
