Code: Select all
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Syroot.NintenTools.Yaz0;
namespace Yaz0
{
class Program
{
public static byte[] ArrayReverse(byte[] array)
{
Array.Reverse(array);
return array;
}
public static Int32 SwapEndianness(Int32 value)
{
return BitConverter.ToInt32(ArrayReverse(BitConverter.GetBytes(value)), 0);
}
static void Main(string[] args)
{
if (args.Count() == 3)
{
switch(args[0])
{
case "decode":
if (File.Exists(args[1]))
{
FileInfo fi = new FileInfo(args[1]);
Yaz0Compression.Decompress(fi.FullName, args[2]);
}
else
{
Console.WriteLine("The specified input file does not exist");
}
break;
case "encode":
if (File.Exists(args[1]))
{
FileInfo fi = new FileInfo(args[1]);
byte[] decodedBuffer = File.ReadAllBytes(fi.FullName);
Int32 bulkChunksCount = decodedBuffer.Length / 0x08;
Int32 extraChunkSize = decodedBuffer.Length % 0x08;
byte[] chunkBuffer = new byte[0x08];
using (FileStream fs = new FileStream(args[2], FileMode.Create, FileAccess.Write))
{
fs.Write(Encoding.UTF8.GetBytes("Yaz0"), 0, 4);
fs.Write(BitConverter.GetBytes(SwapEndianness((Int32)fi.Length)), 0, 4);
fs.Write(BitConverter.GetBytes(SwapEndianness(0x00000000)), 0, 4); //Can be 0x00002000 sometimes, check the original Yaz0 file at offset 0x08
fs.Write(BitConverter.GetBytes(SwapEndianness(0x00000000)), 0, 4);
for (int i = 0; i < bulkChunksCount; i++)
{
fs.Write(BitConverter.GetBytes(0xFF), 0, 1);
Array.Copy(decodedBuffer, (i * 8), chunkBuffer, 0, 8);
fs.Write(chunkBuffer, 0, 8);
}
if (extraChunkSize != 0)
{
Array.Resize(ref chunkBuffer, extraChunkSize);
Array.Copy(decodedBuffer, (0x08 * bulkChunksCount), chunkBuffer, 0, chunkBuffer.Length);
Byte codeByte = 0x00;
switch (extraChunkSize)
{
case 1:
codeByte = 0x80;
break;
case 2:
codeByte = 0xC0;
break;
case 3:
codeByte = 0xE0;
break;
case 4:
codeByte = 0xF0;
break;
case 5:
codeByte = 0xF8;
break;
case 6:
codeByte = 0xFC;
break;
case 7:
codeByte = 0xFE;
break;
default:
break;
}
fs.Write(BitConverter.GetBytes(codeByte), 0, 1);
fs.Write(chunkBuffer, 0, chunkBuffer.Length);
}
}
}
else
{
Console.WriteLine("The specified input file does not exist");
}
break;
default:
break;
}
Console.WriteLine("Finished!");
Console.WriteLine("Press any key to exit ...");
Console.ReadKey();
}
else
{
//Show help
Console.WriteLine("Yaz0.exe decode <input_file> <output_file>");
Console.WriteLine("Yaz0.exe encode <input_file> <output_file>");
Console.WriteLine("Press any key to exit ...");
Console.ReadKey();
}
}
}
}
Forgive my ignorance but that's C#, right? I see it mentions Syroot.NintenTools.Yaz0, do I need to get it before compiling?EcheloCross wrote:Here ya go
Sorry, I must be doing something wrong. Bear with me as I've never done this before. I downloaded VS2015, made it a Visual C# Console Application, got NuGet, ran the command to get Syroot.Nintentools.Yaz0 and built it, but decode just returns "Finished!" without doing anything while encode refuses to work. Could you please compile it?EcheloCross wrote:Yes, its c#, and yes you need to get that Syroot.NintenTools.Yaz0 part for decoding only.
https://github.com/Syroot/NintenTools.Yaz0
You can comment out the decoding part and the need for Syroot.Nintentools.Yaz0 if you are already using a different tool to decode them.
The encode method I wrote using the info from the doc you provided. It uses fake compression (compression level 0), so the file gets larger when encoding. Even though the files are larger, they are still valid Yaz0.
Code: Select all
Yaz0.exe decode Common.sblarc Common_decoded.sblarc
Yaz0.exe encode Common_decoded.sblarc Common_encoded.sblarc
Yaz0.exe decode Common_encoded.sblarc Common_encoded_decoded.sblarc
Thanks. It works, but the game seems to require maximum compression, it still crashes. Might be something new for the format. None of the tools I've tried even got close to the original's 3.770KB.EcheloCross wrote:Here ya go
Give it a try like this, and you'll see the files match if you compare the "decoded" and "encoded_decoded" files md5 sumsCode: Select all
Yaz0.exe decode Common.sblarc Common_decoded.sblarc Yaz0.exe encode Common_decoded.sblarc Common_encoded.sblarc Yaz0.exe decode Common_encoded.sblarc Common_encoded_decoded.sblarc
