java :获取wav文件的编码格式，音频的通道数，采样频率，采样位数

 public static int toInt(byte[] b) {
        return ((b[3] << 24) + (b[2] << 16) + (b[1] << 8) + (b[0] << 0));
    }
   
    public static short toShort(byte[] b) {
        return (short)((b[1] << 8) + (b[0] << 0));
    }
   
   
    public static byte[] read(RandomAccessFile rdf, int pos, int length) throws IOException {
        rdf.seek(pos);
        byte result[] = new byte[length];
        for (int i = 0; i < length; i++) {
            result[i] = rdf.readByte();
        }
        return result;
    }
   
   
    public static void main(String[] args) throws IOException {

        File f = new File("c:\\bong.wav");
        RandomAccessFile rdf = null;
        rdf = new RandomAccessFile(f,"r");
       
        System.out.println("audio size: " + toInt(read(rdf, 4, 4))); // 声音尺寸
       
        System.out.println("audio format: " + toShort(read(rdf, 20, 2))); // 音频格式 1 = PCM
       
        System.out.println("num channels: " + toShort(read(rdf, 22, 2))); // 1 单声道 2 双声道
       
        System.out.println("sample rate: " + toInt(read(rdf, 24, 4)));  // 采样率、音频采样级别 8000 = 8KHz
       
        System.out.println("byte rate: " + toInt(read(rdf, 28, 4)));  // 每秒波形的数据量
       
        System.out.println("block align: " + toShort(read(rdf, 32, 2)));  // 采样帧的大小
       
        System.out.println("bits per sample: " + toShort(read(rdf, 34, 2)));  // 采样位数
       
        rdf.close();
       
    }

评论

1 楼 redlwb225 2018-07-20  

刚好用到，总体可用，但是转int和short的方法有些问题，会导致到不对的数据，修正如下：

public static int toInt(byte[] b) {  

        return (((b[3] & 0xff) << 24) + ((b[2] & 0xff) << 16) + ((b[1] & 0xff) << 8) + ((b[0] & 0xff) << 0));  

}