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();
???????
??? }
