package main

import (
	"bufio"
	"fmt"
	"io"
	"log"
	"os"
)

const fname = "/home/rob/Desktop/example.mp3"

const syncHeader1 = 0xFF
const syncHeader2 = 0xFE

func main() {
	f, err := os.Open(fname)
	if err != nil {
		log.Fatal(err)
	}

	bufreader := bufio.NewReader(f)

	buf := make([]byte, 4)
	var i int
	for {
		_, err := io.ReadFull(bufreader, buf)
		if err != nil {
			log.Fatal(err)
		}

		if parseBytes(buf) {
			fmt.Printf("Got possible header %X at %d\n", buf, i)
		}

		i++
		bufreader.UnreadByte()
	}
}

func parseBytes(buf []byte) bool {
	return buf[0]&syncHeader1 == syncHeader1 || buf[0]&syncHeader2 == syncHeader2
}