package net.pterodactylus.sonitus.data.sink;
+import static javax.sound.sampled.FloatControl.Type.VOLUME;
+
import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Arrays;
+import java.util.List;
import java.util.logging.Logger;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
+import net.pterodactylus.sonitus.data.Controller;
import net.pterodactylus.sonitus.data.Metadata;
import net.pterodactylus.sonitus.data.Sink;
import net.pterodactylus.sonitus.data.Source;
+import net.pterodactylus.sonitus.data.controller.Fader;
+import net.pterodactylus.sonitus.data.controller.Switch;
+import net.pterodactylus.sonitus.io.IntegralWriteOutputStream;
import com.google.common.base.Preconditions;
+import com.google.common.eventbus.EventBus;
/**
* {@link Sink} implementation that uses the JDK’s {@link AudioSystem} to play
/** The logger. */
private static final Logger logger = Logger.getLogger(AudioSink.class.getName());
+ /** The event bus. */
+ private final EventBus eventBus;
+
+ /** The volume fader. */
+ private final Fader volumeFader;
+
+ /** The “mute” switch. */
+ private final Switch muteSwitch;
+
/** The current metadata. */
private Metadata metadata;
/** The audio output. */
private SourceDataLine sourceDataLine;
+ /** A buffered output stream to ensure correct writing to the source data line. */
+ private OutputStream sourceDataLineOutputStream = new IntegralWriteOutputStream(new OutputStream() {
+
+ @Override
+ public void write(int b) throws IOException {
+ }
+
+ @Override
+ public void write(byte[] b) throws IOException {
+ write(b, 0, b.length);
+ }
+
+ @Override
+ public void write(byte[] b, int off, int len) throws IOException {
+ if (sourceDataLine != null) {
+ sourceDataLine.write(b, off, len);
+ }
+ }
+ }, 1024);
+
+ /**
+ * Creates a new audio sink.
+ *
+ * @param eventBus
+ * The event bus
+ */
+ public AudioSink(EventBus eventBus) {
+ this.eventBus = eventBus;
+ volumeFader = new Fader("Volume") {
+
+ @Override
+ protected void valueSet(Double value) {
+ if (sourceDataLine != null) {
+ FloatControl volumeControl = (FloatControl) sourceDataLine.getControl(VOLUME);
+ volumeControl.setValue((float) (value * volumeControl.getMaximum()));
+ }
+ }
+ };
+ muteSwitch = new Switch("Mute") {
+
+ private float previousValue;
+
+ @Override
+ protected void valueSet(Boolean value) {
+ if (sourceDataLine != null) {
+ FloatControl volumeControl = (FloatControl) sourceDataLine.getControl(VOLUME);
+ if (value) {
+ previousValue = volumeControl.getValue();
+ volumeControl.setValue(0);
+ } else {
+ volumeControl.setValue(previousValue);
+ }
+ }
+ }
+ };
+ }
+
+ //
+ // CONTROLLED METHODS
+ //
+
+ @Override
+ public String name() {
+ return "Audio Output";
+ }
+
+ @Override
+ public Metadata metadata() {
+ return metadata;
+ }
+
+ @Override
+ public List<Controller<?>> controllers() {
+ return Arrays.<Controller<?>>asList(volumeFader, muteSwitch);
+ }
+
+ //
+ // SINK METHODS
+ //
+
@Override
public void open(Metadata metadata) throws IOException {
Preconditions.checkArgument(metadata.encoding().equalsIgnoreCase("PCM"), "source must be PCM-encoded");
@Override
public void metadataUpdated(Metadata metadata) {
- /* ignore. */
+ logger.info(String.format("Now playing %s.", metadata));
+ this.metadata = metadata;
}
@Override
- public void process(byte[] buffer) {
- sourceDataLine.write(buffer, 0, buffer.length);
+ public void process(byte[] buffer) throws IOException {
+ sourceDataLineOutputStream.write(buffer);
logger.finest(String.format("AudioSink: Wrote %d Bytes.", buffer.length));
}