Audio encoding/decoding

example.d

import audio;

auto soundDecoder = new Decoder(new BufferedFile("./mywave.mp3"));
// Decoder should implements opApply method;
// http://dlang.org/statement.html#opApply
foreach(ulong frameNumber, FrameInfo frame; soundDecoder) {
    // so something usefull, FFT for example
    doStuff(frame.data);
}
// or
soundDecoder.rewind();
FrameInfo frame = soundDecoder.getFrame();
// or
soundDecoder.rewind();
FrameInfo[] frames = soundDecoder.getAllFrames();