如何从wav文件中获取PCM数据？ [英] How to get PCM data from a wav file?

问题描述

我有 .wav 文件。我想从该声音文件中获取PCM数据，以便我可以从声音中获取单个数据块并对其进行处理。

I have a .wav file. I want to get the PCM data from that sound file, so that I can get the individual data chunks from the sound and process it.

但我不知道怎么做。谁能告诉我怎么做？
到目前为止我已经这样做了：

But I don't know how to do it. Can anyone tell me how to do it? I have done this so far:

public class test
{

    static int frameSample;
    static int timeofFrame;
    static int N;
    static int runTimes;
    static int bps;
    static int channels;
    static double times;
    static int bufSize;
    static int frameSize;
    static int frameRate;
    static long length;

    public static void main(String[] args)
    {
        try
        {
            AudioInputStream ais = AudioSystem.getAudioInputStream(new File("music/audio.wav"));
            AudioInputStream a;
            int numBytes = ais.available();
            System.out.println("numbytes: "+numBytes);
            byte[] buffer = new byte[numBytes];
            byte[] buffer1=new byte[numBytes] ;
            int k=0;
            int count=0;
            while(count!=-1){
                count=ais.read(buffer, 0, numBytes);
            }
            long value = 0;

            for (int i = 0; i < buffer.length; i++)
            {
               value = ((long) buffer[i] & 0xffL) << (8 * i);
               System.out.println("value: "+value);
            }
        } catch(Exception e) {

        }
    }
}

推荐答案

这可以通过完成Java Sound API。

• 使用 AudioSystem 获取<来自文件的code> AudioInputStream 。


• 查询 AudioFormat 的流。


• 创建 byte [] 以适应格式。例如。 8位单声道是字节[1] 。 16位立体声是 byte [4] 。


• 读取 byte [] <的块中的流/ code>并且它将逐帧包含声音。


• 继续进行处理..

• Use the AudioSystem to get an AudioInputStream from the file.
• Query the stream for the AudioFormat.
• Create a byte[] to suit the format. E.G. 8 bit mono is a byte[1]. 16 bit stereo is byte[4].
• Read the stream in chunks of the byte[] and it will contain the sound, frame by frame.
• Proceed with further processing..

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