Using a byte array to create an AudioInputStream
I'm still working of my small project to create a mixing console in JAVA and I have a new obstacle. I'm trying to create an audioInputStream from a byteArray and then, read it to hear the sound. But there's something wrong in my code : I don't hear anything.
Here is my code :
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.OutputStream;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;
public class SoudTest {
private SourceDataLine sLine;
private AudioFormat audioFormat;
private AudioInputStream audioInputStream;
private AudioInputStream audioInputStream2;
private ByteArrayOutputStream byteArrayOutputStream= new ByteArrayOutputStream();;
private File file = new File ("test.wav");
private File file2 = new File ("test2.wav");
SoudTest () {
/*
* The aim of this code is to test the possibility or creating a mixing console in JAVA like the physical mixing consoles
* First step : Create an inputstream from a file, a microphone or anything else
* This is like plugging a source to a line-in of a stripe of a mixing console
* Second : Reading this input stream and create a byte array
* This byte array will be sent to the "master output" of the mixing console
* Question to answer later : how to create a byte array that will act like a buffer for the next steps...
* Third : Using this byte array to create an audioInputStream
* This step is like having the "master volume" getting what is sent by the stripe.
* Fourth : reading this audioInputStream
* The sound should flow out to the speaker
*/
//1st step
try {
audioInputStream=AudioSystem.getAudioInputStream(file);
} catch (Exception e) {
e.printStackTrace();
}
AudioFileFormat.Type targetType = AudioFileFormat.Type.WAVE;
//2nd step
try {
AudioSystem.write(audioInputStream, targetType, byteArrayOutputStream);
} catch (Exception e) {
e.printStackTrace();
} finally {
System.out.println("Finally...");
//tLine.close();
System.out.println("Line closed");
try {
audioInputStream.close();
System.out.println("Stream closed.");
} catch (Exception e) {
e.printStackTrace();
}
}
/////////////////////////////////////////////////////////////
//3rd step
System.out.println("Size of the outputStream : "+byteArrayOutputStream.size());
byte[] byteArray = byteArrayOutputStream.toByteArray();
System.out.println("Size of byte array : "+byteArray.length);
ByteArrayInputStream bis = new ByteArrayInputStream(byteArray);
audioFormat = new AudioFormat(44100, 16, 2, true, false);
audioInputStream2=new AudioInputStream(bis, audioFormat, 1024);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat);
try {
//System.out.println(info);
sLine=(SourceDataLine) AudioSystem.getLine(info);
System.out.println(sLine.getLineInfo());
} catch (Exception e) {
e.printStackTrace();
}
try {
sLine.open(audioFormat);
} catch (Exception e){
e.printStackTrace();
}
sLine.start();
System.out.println("Line Started");
//4th step
try {
byte bytes[] = new byte[1024];
int bytesRead=0;
int loop=0;
while ((bytesRead=audioInputStream2.read(bytes, 0, bytes.length))!= -1) {
//getVolumeLevel(bytes);
try {
sLine.write(bytes, 0, bytesRead);
System.out.println(loop);
} catch (Exception e) {
e.printStackTrace();
}
loop+=1;
}
System.out.println("No bytes anymore !");
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("Line stopped");
}
}
Here is the output in my console :
Finally... Line closed
Stream closed.
Size of the outputStream : 35527724
Size of byte array : 35527724
interface SourceDataLine supporting format PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian, and buffers of 0 to 1000000 bytes
Line Started
0 1 2 3
No bytes anymore ! Line stopped
My original file have a size of 35.5 Mo and my byte array have a length of 35.527.727 so, it looks possible. Then, my "chunk" array have a size of 1024 so, I'm expecting around 37700 loop. So why does my "loop count" stop at "3" ?
I hope my code is clear enouth with the comments. Thank you for your help ;-)
Ok,I assume : I'm stupid. When I create my audioInputStream2, I just didn't take enough care of the last parameter.
Instead of : audioInputStream2=new AudioInputStream(bis, audioFormat, 1024);
I should have written : audioInputStream2=new AudioInputStream(bis, audioFormat, byteArray.length);