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[英]Need Help for this flow (AudioInputStream -> byte Array -> AudioOutputStream)
[英]Using a byte array to create an AudioInputStream
我仍然在做我的小項目,用JAVA創建一個調音台,但遇到了新的障礙。 我正在嘗試從byteArray創建一個audioInputStream,然后讀取它以聽到聲音。 但是我的代碼有問題:我什么也沒聽到。
這是我的代碼:
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");
}
}
這是我的控制台中的輸出:
最后...線關閉
流關閉。
outputStream的大小:35527724
字節數組的大小:35527724
接口SourceDataLine支持格式PCM_SIGNED的未知采樣率,16位,立體聲,4字節/幀,little-endian和0到1000000字節的緩沖區
行開始
0 1 2 3
沒有字節了! 行已停止
我的原始文件的大小為35.5 Mo,字節數組的長度為35.527.727,因此,這似乎是可能的。 然后,我的“塊”數組的大小為1024,因此,我期望37700左右的循環。 那么,為什么我的“循環計數”停在“ 3”呢?
我希望我的代碼與注釋清楚。 謝謝您的幫助 ;-)
好吧,我想:我很傻。 創建audioInputStream2時,我只是沒有足夠注意最后一個參數。
而不是: audioInputStream2=new AudioInputStream(bis, audioFormat, 1024);
我應該寫: audioInputStream2=new AudioInputStream(bis, audioFormat, byteArray.length);
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