下面列出了javax.sound.sampled.Clip#getControl ( ) 实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。
private Clip GetAudioClip(String path)
{
File audioFile = new File(path);
if (!audioFile.exists())
{
return null;
}
try (AudioInputStream audioStream = AudioSystem.getAudioInputStream(audioFile))
{
Clip audioClip = AudioSystem.getClip();
audioClip.open(audioStream);
FloatControl gainControl = (FloatControl) audioClip.getControl(FloatControl.Type.MASTER_GAIN);
float gainValue = (((float) config.volume()) * 40f / 100f) - 35f;
gainControl.setValue(gainValue);
return audioClip;
}
catch (IOException | LineUnavailableException | UnsupportedAudioFileException e)
{
log.warn("Error opening audiostream from " + audioFile, e);
return null;
}
}
public static void main(String args[]) throws Exception {
boolean res = true;
try {
AudioInputStream ais = new AudioInputStream(
new ByteArrayInputStream(new byte[2000]),
new AudioFormat(8000.0f, 8, 1, false, false), 2000); //
AudioFormat format = ais.getFormat();
DataLine.Info info = new DataLine.Info(Clip.class, format,
((int) ais.getFrameLength()
* format
.getFrameSize()));
Clip clip = (Clip) AudioSystem.getLine(info);
clip.open();
FloatControl rateControl = (FloatControl) clip.getControl(
FloatControl.Type.SAMPLE_RATE);
int c = 0;
while (c++ < 10) {
clip.stop();
clip.setFramePosition(0);
clip.start();
for (float frq = 22000; frq < 44100; frq = frq + 100) {
try {
Thread.currentThread().sleep(20);
} catch (Exception e) {
break;
}
rateControl.setValue(frq);
}
}
} catch (Exception ex) {
ex.printStackTrace();
res = ex.getMessage().indexOf(
"This method should not have been invoked!") < 0;
}
if (res) {
System.out.println("Test passed");
} else {
System.out.println("Test failed");
throw new Exception("Test failed");
}
}
/**
* Plays the clip with the specified volume.
* @param volume the volume the play at
* @param listener the line listener
* @throws LineUnavailableException if a clip object is not available or
* if the line cannot be opened due to resource restrictions
*/
public void start(float volume, LineListener listener) throws LineUnavailableException {
Clip clip = getClip();
if (clip == null)
return;
// PulseAudio does not support Master Gain
if (clip.isControlSupported(FloatControl.Type.MASTER_GAIN)) {
// set volume
FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
float dB = (float) (Math.log(volume) / Math.log(10.0) * 20.0);
gainControl.setValue(dB);
}
if (listener != null)
clip.addLineListener(listener);
clip.setFramePosition(0);
clip.start();
}
private void play(String wavPath, float db) {
if (!dnd && db > -40) {
ClassLoader classLoader = getClass().getClassLoader();
try (AudioInputStream stream = AudioSystem.getAudioInputStream(classLoader.getResource(wavPath))) {
Clip clip = AudioSystem.getClip();
clip.open(stream);
if (db != 0.0) {
FloatControl gainControl =
(FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
gainControl.setValue(db);
}
clip.start();
} catch (Exception e) {
logger.error("Cannot start playing wav file: ", e);
}
}
}
/**
* Plays the clip with the specified volume.
* @param volume the volume the play at
* @param listener the line listener
* @throws LineUnavailableException if a clip object is not available or
* if the line cannot be opened due to resource restrictions
*/
public void start(float volume, LineListener listener) throws LineUnavailableException {
Clip clip = getClip();
if (clip == null)
return;
// PulseAudio does not support Master Gain
if (clip.isControlSupported(FloatControl.Type.MASTER_GAIN)) {
// set volume
FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
float dB = (float) (Math.log(volume) / Math.log(10.0) * 20.0);
gainControl.setValue(Utils.clamp(dB, gainControl.getMinimum(), gainControl.getMaximum()));
} else if (clip.isControlSupported(FloatControl.Type.VOLUME)) {
// The docs don't mention what unit "volume" is supposed to be,
// but for PulseAudio it seems to be amplitude
FloatControl volumeControl = (FloatControl) clip.getControl(FloatControl.Type.VOLUME);
float amplitude = (float) Math.sqrt(volume) * volumeControl.getMaximum();
volumeControl.setValue(Utils.clamp(amplitude, volumeControl.getMinimum(), volumeControl.getMaximum()));
}
if (listener != null)
clip.addLineListener(listener);
clip.setFramePosition(0);
clip.start();
}
public static synchronized Clip playback(AudioInputStream in, float addVolume) {
try {
AudioFormat baseFormat = in.getFormat();
AudioFormat decodedFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
baseFormat.getSampleRate(),
16,
baseFormat.getChannels(),
baseFormat.getChannels() * 2,
baseFormat.getSampleRate(),
false);
AudioInputStream ain = AudioSystem.getAudioInputStream(decodedFormat, in);
DataLine.Info info = new DataLine.Info(Clip.class, decodedFormat);
// https://stackoverflow.com/questions/25564980/java-use-a-clip-and-a-try-with-resources-block-which-results-with-no-sound
final Clip clip = (Clip) AudioSystem.getLine(info);
clip.open(ain);
// Input stream must be closed, or else some thread is still running when application is exited.
in.close();
ain.close();
FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);
gainControl.setValue(addVolume); // Add volume by decibels.
return clip;
} catch (Exception e) {
logger.debug(e.toString());
return null;
}
}
/**
* Set the volume
* @param vol New configuration volume (1.0The default )
*/
public void setVolume(double vol) {
volume = vol;
Set<String> set = clipMap.keySet();
for(String name: set) {
try {
Clip clip = clipMap.get(name);
FloatControl ctrl = (FloatControl)clip.getControl(FloatControl.Type.MASTER_GAIN);
ctrl.setValue((float)Math.log10(volume) * 20);
} catch (Exception e) {}
}
}
public void setPanning(int chan,int sep){
Clip c=channels[chan];
if (c.isControlSupported(Type.PAN)){
FloatControl bc=(FloatControl) c.getControl(Type.PAN);
// Q: how does Doom's sep map to stereo panning?
// A: Apparently it's 0-255 L-R.
float pan= bc.getMinimum()+(bc.getMaximum()-bc.getMinimum())*(float)sep/ISoundDriver.PANNING_STEPS;
bc.setValue(pan);
}
}