package QuickVerifyCrap;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class PrimeMagic {
    public static void main(String[] args) throws IOException {
        double downscaler = 1.0/1.3;
        double[] multconst = new double[16];
        double mult = 1.0;
        for(int i=15;i>0;i--)
        {
            multconst[i]=mult;
            mult=mult*downscaler;
        }
        byte[] framelengths = new byte[]{0,0,0,0, 0,0,0,2, 4,8,16,32, 0,0,0,0};


        String basepath = "D:/LOA/000030";
        RandomAccessFile flash = new RandomAccessFile(basepath+"/flash.bin","r");
        int count = flash.readInt();
        count = Integer.reverseBytes(count);
        System.out.println(count);
        int dud = flash.readInt(); //2x unknown
        dud = flash.readInt();
        dud = flash.readInt();
        int[] fileoffsets = new int[count];
        int[] filelengths = new int[count];
        for(int i=0;i<count;i++)
        {
            int offset = Integer.reverseBytes(flash.readInt());
            int len = Integer.reverseBytes(flash.readInt());
            filelengths[i]=len;
            fileoffsets[i]=offset;
        }
        for(int i=0;i<count;i++)
        {
            System.out.println(count);
            System.out.println(fileoffsets[i]);
            flash.seek(fileoffsets[i]);
            dud = flash.readInt(); //flags & samplerate, ignure due to being const
            RandomAccessFile multipliers = new RandomAccessFile(basepath+"/flash."+i+".mult.bin","rw");
            RandomAccessFile modifiers = new RandomAccessFile(basepath+"/flash."+i+".mod.bin","rw");
            RandomAccessFile processedData = new RandomAccessFile(basepath+"/flash."+i+".proc.bin","rw");
            RandomAccessFile rawData = new RandomAccessFile(basepath+"/flash."+i+".raw.bin","rw");
            int limit = Integer.reverseBytes(flash.readInt());
            dud = flash.readInt(); //flags & samplerate, ignure due to being const
            long hardlimit = flash.getFilePointer()+limit;
            while(flash.getFilePointer()<hardlimit)
            {
                byte frameprefix = flash.readByte();
                byte multiplier = (byte)((frameprefix>>4)&0x0F);
                byte framelen = (byte)(frameprefix&0x0f);
                multipliers.write(multiplier);
                int mappedFramelen = framelengths[framelen];
                boolean tail=false;
                if(mappedFramelen==0)
                {
                    tail=true;
                    mappedFramelen= (int) (hardlimit- flash.getFilePointer()); //edgecase tail;
                }
                byte modifier = flash.readByte();
                modifiers.write(modifier);
                byte[] framecontent = new byte[mappedFramelen];
                flash.read(framecontent);
                for(int j=0;j<mappedFramelen;j++)
                {
                    int rescaledSample = framecontent[j];
                    rescaledSample *=multconst[multiplier];
                    processedData.writeShort(rescaledSample);
                }
                rawData.write(framecontent);
            }
            multipliers.close();
            modifiers.close();
            processedData.close();
            rawData.close();
        }
    }
}