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| /*
* Copyright (C) 2005 Luca Veltri - University of Parma - Italy
* Author(s):
* Luca Veltri (luca.veltri@unipr.it)
*/
import java.io.OutputStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.Mixer.Info;
/** AudioOutput allows the access of system audio output in pure-java manner.
* It uses the javax.sound library (package).
*/
public class AudioOutput
{
// ####################### BEGIN STATIC #######################
static boolean DEBUG=true;
static final int INTERNAL_BUFFER_SIZE=40960;
private static SourceDataLine source_line = null;
// private static SourceDataLine source_line2 = null;
static Mixer mixer;
private static AudioFormat format;
/** Init the static system audio output line */
public static boolean initAudioLine(int soundCardNumber) {
if (source_line != null) {
println("init : source_line != null");
// source_line.stop();
// closeAudioLine();
soundCardNumber = 0;
}
Info[] aInfos=AudioSystem.getMixerInfo();
mixer = AudioSystem.getMixer(aInfos[soundCardNumber]);
for(int i = 0;i<aInfos.length;i++) {
println("Valeur carte audio : ("+i+") "+aInfos[i]);
}
// for(javax.sound.sampled.Line.Info i : mixer.getSourceLineInfo()) {
// println("liste info : "+i);
// }
// by default use 8000 Hz, ULAW, 8bit, Mono
float fFrameRate=8000.0F;
format=new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, fFrameRate, 16, 1, 2, fFrameRate, false);
DataLine.Info lineInfo=new DataLine.Info(SourceDataLine.class, format, INTERNAL_BUFFER_SIZE);
// DataLine.Info lineInfo2=new DataLine.Info(SourceDataLine.class, format, INTERNAL_BUFFER_SIZE);
if (!mixer.isLineSupported(lineInfo)) {
System.err.println("ERROR: AudioLine not supported by this System.");
}
// if (!mixer.isLineSupported(lineInfo2)) {
// System.err.println("ERROR: AudioLine not supported by this System.");
// }
println("getMaxLines : "+mixer.getMaxLines(lineInfo));
try {
if (source_line == null) {
source_line=(SourceDataLine)mixer.getLine(lineInfo);
source_line.open(format,INTERNAL_BUFFER_SIZE);
// } else if (source_line2 == null) {
// source_line2=(SourceDataLine)mixer.getLine(lineInfo);
// source_line2.open(format,INTERNAL_BUFFER_SIZE);
}
} catch (LineUnavailableException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// try {
// source_line2=(SourceDataLine)mixer.getLine(lineInfo);
// source_line2.open(format,INTERNAL_BUFFER_SIZE);
// } catch (LineUnavailableException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
if (DEBUG) {
System.err.println("SourceDataLine: "+source_line);
System.err.println("##### nombre de source line : "+mixer.getSourceLines().length+" ######");
}
return true;
}
/** Closes the static system audio output line. */
static public void closeAudioLine() {
source_line.close();
// source_line2.close();
}
// ######################## END STATIC ########################
AudioOutputStream audio_output_stream=null;
// AudioOutputStream audio_output_stream2=null;
public AudioOutput() {
println("AudioOutput");
if (source_line==null) {
println("AudioOutput::source line = null");
} else {
println("AudioOutput::source line != null");
}
init(null);
}
/** Constructs an AudioOutput */
public AudioOutput(AudioFormat audio_format) {
init(audio_format);
}
/** Inits an AudioOutput */
private void init(AudioFormat format) {
// if (source_line==null) {
System.err.println ("AudioOutput : init" );
initAudioLine(0);
// }
if (format==null) {
// by default use 8000 Hz, ULAW, 8bit, Mono
float fFrameRate=8000.0F;
format=new AudioFormat(AudioFormat.Encoding.ULAW, fFrameRate, 16, 1, 1, fFrameRate, false);
// } else {
// float fFrameRate=8000.0F;
// // format=new AudioFormat(AudioFormat.Encoding.ULAW, fFrameRate, 8, 1, 1, fFrameRate, false);
// format=new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, fFrameRate, 16, 1, 2, fFrameRate, false);
}
if (source_line.isOpen()){
// convert the audio stream to the selected format
try {
audio_output_stream=new AudioOutputStream(source_line,format);
}
catch (Exception e) {
e.printStackTrace();
}
}
else {
System.err.print("WARNING: Audio init error: source line is not open.");
}
// if (source_line.isOpen()){
// // convert the audio stream to the selected format
// try {
// audio_output_stream2=new AudioOutputStream(source_line2,format);
// }
// catch (Exception e) {
// e.printStackTrace();
// }
// }
}
/** Gets the audio OuputStream */
public OutputStream getOuputStream() {
println("getOuputStream()");
// return output_stream;
return audio_output_stream;
}
/** Starts playing */
public void play(){
if (source_line.isOpen()) {
source_line.start();
}
else{
System.err.print("WARNING: Audio play error: source line is not open.");
}
// if (source_line2.isOpen()) {
// source_line2.start();
// }
}
/** Stops playing */
public void stop(){
if (source_line.isOpen()) {
source_line.drain();
source_line.stop();
}
else {
System.err.print("WARNING: Audio stop error: source line is not open.");
}
// //source_line.close();
// if (source_line2.isOpen()) {
// source_line2.drain();
// source_line2.stop();
// }
}
/** Debug output */
private static void println(String str) {
System.err.println("AudioOutput: "+str);
}
/** Debug output */
private static void print(String str) {
System.err.print("AudioOutput: "+str);
}
} |
