byte[] eachPass = new byte[1600]; //used to store data from TargetDataLine for each pass
byte[] backingArray = new byte[16000]; //the complete data for one second
ByteBuffer buffer = ByteBuffer.wrap(backingArray); //buffer which stores the complete data
short[] audioSample = new short[16000/2]; //audio samples to be encoded
int passCounter = 0; /* After 10th pass, convert the byte[] to short[]
* using ByteBuffer */
int seconds = 0; // used to store the position of the packet
while(keepCapturing == true){
-- set up the java.awt.Robot and TargetDataLine before entering the loop --
-- use java.awt.Robot to record the screen --
-- do some other stuff, if needed --
fromMic.read(eachPass,0,eachPass.length); // read data from microphone
buffer.put(eachPass); //put it in a bigger buffer
if(passCounter!=0 && passCounter%10==0){ // is it 10th frame?
passCounter = 0; //reset counter
seconds++;
buffer.asShortBuffer.get(audioSamples); //get short[] in BigEndian format
-- encode the audio at position (seconds-1) --
buffer.clear();
}else{
passCounter++;
}
buffer.position()
在if
语句中返回16000,但当我BufferUnderflowException
java.util.Arrays.toString()
查看我的eachPass
和audioSamples
包含的内容,我在每个通道中获得了一些数字,如-107,0,32等,以及audioSamples中的所有零。为什么? <2>退伍军人,请你帮我解释一下这段代码?我不知道发生了什么。
答案 0 :(得分:7)
在阅读数据之前,您忘记了flip缓冲区,这就是为什么没有写入audioSamples
。
buffer.flip();
buffer.asShortBuffer.get(audioSamples);