[英]Play WAV file backward
I'm making Braid in Java. 我正在用Java 编写Braid 。 If you rewind the time, the sound plays backward. 如果您回放时间,声音会向后播放。 How to play a WAV file backwards? 如何向后播放WAV文件? Maybe with a stream with something like previous()
? 也许使用像previous()
类的流? On the site of Braid can you see what I mean. 在Braid的网站上你能看出我的意思吗?
Update: Solved! 更新: 解决了! See my own post. 看我自己的帖子。
YEEEEEEESSSSS!!!!!!!! YEEEEEEESSSSS !!!!!!!!
I solved it by myself (14 years old!!) 我自己解决了(14岁!!)
I've written this class: 我写过这堂课:
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
/**
*
* @author Martijn
*/
public class FrameBuffer {
private byte[][] frames;
private int frameSize;
public FrameBuffer(AudioInputStream stream) throws IOException {
readFrames(stream);
}
public byte[] getFrame(int i) {
return frames[i];
}
public int numberFrames()
{
return frames.length;
}
public int frameSize()
{
return frameSize;
}
private void readFrames(AudioInputStream stream) throws IOException {
frameSize = stream.getFormat().getFrameSize();
frames = new byte[stream.available() / frameSize][frameSize];
int i = 0;
for (; i < frames.length; i++)
{
byte[] frame = new byte[frameSize];
int numBytes = stream.read(frame, 0, frameSize);
if (numBytes == -1)
{
break;
}
frames[i] = frame;
}
System.out.println("FrameSize = " + frameSize);
System.out.println("Number frames = " + frames.length);
System.out.println("Number frames read = " + i);
}
}
And then: 然后:
FrameBuffer frameStream = new FrameBuffer(austream); //austream is the audiostream
int frame = frameStream.numberFrames() - 1;
while (frame >= 0) {
auline.write(frameStream.getFrame(frame), 0, frameStream.frameSize());
frame--;
}
If the WAV contains PCM, reverse the order of the PCM samples. 如果WAV包含PCM,则反转PCM样本的顺序。 If it contains some other format it can be a lot more complex; 如果它包含一些其他格式,它可能会复杂得多; probably easiest to just convert it to PCM first. 可能最容易将它首先转换为PCM。
For more information on the WAV format, see this site . 有关WAV格式的更多信息,请访问此站点 。
Use Windows Sound Recorder (in Start --> Programs --> Accessories --> Entertainment). 使用Windows录音机(在开始 - >程序 - >附件 - >娱乐中)。
It has a feature (Effects (menu) --> Reverse) to reverse a .WAV file. 它有一个功能(效果(菜单) - >反转)来反转.WAV文件。 You could save the reversed file with a different name, and then open the appropriate one in your program. 您可以使用其他名称保存反转文件,然后在程序中打开相应的文件。
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