使用一个字节数组来创建一个AudioInputStream
我仍然在为我的小型项目工作，在JAVA中创建混音控制台，并且我有一个新的障碍。 我试图从byteArray创建一个audioInputStream，然后阅读它来听到声音。 但是我的代码有问题：我什么都没听到。
这是我的代码：
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");
}
}
这是我的控制台中的输出：
最后......线关闭
流关闭。
outputStream的大小：35527724
字节数组的大小：35527724
接口SourceDataLine支持格式PCM_SIGNED未知采样率，16位，立体声，4字节/帧，小端，以及0到1000000字节的缓冲区
线开始
0 1 2 3
没有字节了！ 线路停止
我的原始文件大小为35.5 Mo，而我的字节数组长度为35.527.727，所以看起来可能。 然后，我的“块”数组的大小为1024，所以我期待大约37700循环。 那么为什么我的“循环计数”停在“3”？
我希望我的代码在评论中清楚。 感谢您的帮助 ;-）
好吧，我假设：我很愚蠢。 当我创建我的audioInputStream2时，我只是没有足够的关心最后一个参数。
而不是： audioInputStream2=new AudioInputStream(bis, audioFormat, 1024);
我应该写： audioInputStream2=new AudioInputStream(bis, audioFormat, byteArray.length);