如何使用FileInputStream将音频文件读取到具有2个字节数据的数组中

Question

In another word, the file was write with PCM_16bit, but those data was store as 8-bit. I want to ananlyze this file with dsp, but how can I read this file in 16 bit a time and form this 16bit as one integer from 0-65535.

Answer 1

Not entirely sure what you're asking, but if what you want is to read two-bytes at a time as a single unsigned value, you can use something like this:

File f = new File("/path/to/file");
DataInputStream dis = new DataInputStream(new FileInputStream(f));

List<Integer> values = new ArrayList<>();

try {
    while (true){
        values.add(dis.readUnsignedShort());
    }
} catch(EOFException e){
    /* you've read everything at this point */
} finally {
    dis.close();
}

You can change values into a primitive array at that point, or just work with the list directly.