static async Task Decompress(byte[] bts, string dir, NItem item)
{
if (item.IsCompressed == 0 || (item.Unk4 == item.Unk5 && item.OriginalLength == item.CompressedLength))
{
//Console.WriteLine($"Unpack {item.Id:X8}");
var header = bts.Take(32).ToArray();
var fileName = InferExtension(header, item, out var category);
Console.WriteLine($"Unpack: {fileName}");
var path = Path.Combine(dir, category);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
using (var fs = File.Create(Path.Combine(path, fileName)))
{
await fs.WriteAsync(bts, 0, bts.Length);
}
}
else
{
//Console.WriteLine($"Decompress: {item.Id:X8}");
using (var output = new MemoryStream((int)item.OriginalLength))
{
try
{
using (var ms = new MemoryStream(bts, 2, bts.Length - 2))
using (var zs = new DeflateStream(ms, CompressionMode.Decompress, false))
{
await zs.CopyToAsync(output);
output.Position = 0;
}
}
catch (InvalidDataException e)
{
Console.WriteLine($"Decompress {item.Id:X8}({item.Offset}) failed.");
}
var header = new byte[32];
await output.ReadAsync(header, 0, header.Length);
var fileName = InferExtension(header, item, out var category);
Console.WriteLine($"Decompress: {fileName}");
var path = Path.Combine(dir, category);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
output.Position = 0;
using (var fs = File.Create(Path.Combine(path, fileName)))
{
await output.CopyToAsync(fs);
}
}
}
}
static void Unpack(string npk, string dir)
{
if (!File.Exists(npk))
{
Console.WriteLine("Can not find npk file.");
return;
}
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
var fs = File.OpenRead(npk);
var br = new BinaryReader(fs);
var len = fs.Length;
fs.Seek(20, SeekOrigin.Begin);
var mapOffset = br.ReadUInt32(); //begin: res bytes, end: map
List <NItem> items = new List <NItem>();
fs.Seek(mapOffset, SeekOrigin.Begin);
while (fs.Position + 4 * 7 <= len)
{
var item = new NItem
{
Id = br.ReadUInt32(),
Offset = br.ReadUInt32(),
CompressedLength = br.ReadUInt32(),
OriginalLength = br.ReadUInt32(),
Unk4 = br.ReadUInt32(),
Unk5 = br.ReadUInt32(),
IsCompressed = br.ReadUInt32(),
};
//if (item.Id == 0x694FDF33 || item.Unk4 == 0x694FDF33 || item.Unk5 == 0x694FDF33)
//{
// Console.WriteLine("maybe have name");
//}
items.Add(item);
}
items.Sort((o1, o2) => (int)((long)o1.Offset - (long)o2.Offset));
List <Task> tasks = new List <Task>(items.Count);
foreach (var it in items)
{
fs.Seek(it.Offset, SeekOrigin.Begin);
var bts = br.ReadBytes((int)it.CompressedLength);
tasks.Add(Decompress(bts, dir, it));
}
Task.WaitAll(tasks.ToArray());
Console.WriteLine("Done.");
br.Dispose();
}
static string InferExtension(byte[] header, NItem item, out string category)
{
var result = _sniffer.Match(header);
if (result.Count == 0)
{
var headerStr = Encoding.ASCII.GetString(header);
if (headerStr.StartsWith("KTX") ||
headerStr.StartsWith("«KTX"))
{
category = "texture";
return($"{item.Id:X8}.ktx");
}
if (headerStr.StartsWith("PKM"))
{
category = "texture";
return($"{item.Id:X8}.pkm");
}
if (headerStr.StartsWith("RGIS"))
{
category = "rgis";
return($"{item.Id:X8}.rgis");
}
if (headerStr.StartsWith("<NeoX") ||
headerStr.StartsWith("<Neox"))
{
category = "NeoXml";
return($"{item.Id:X8}.NeoX.xml");
}
if (headerStr.StartsWith("<FxGroup"))
{
category = "NeoXml";
return($"{item.Id:X8}.FxGroup.xml");
}
if (headerStr.StartsWith("<SceneMusic"))
{
category = "NeoXml";
return($"{item.Id:X8}.SceneMusic.xml");
}
if (headerStr.StartsWith("<MusicTriggers"))
{
category = "NeoXml";
return($"{item.Id:X8}.MusicTriggers.xml");
}
if (headerStr.StartsWith("<cinematic"))
{
category = "NeoXml";
return($"{item.Id:X8}.cinematic.xml");
}
if (headerStr.StartsWith("<EquipList"))
{
category = "NeoXml";
return($"{item.Id:X8}.EquipList.xml");
}
if (headerStr.StartsWith("<SceneConfig"))
{
category = "NeoXml";
return($"{item.Id:X8}.SceneConfig.xml");
}
if (headerStr.StartsWith("<SceneRoad"))
{
category = "NeoXml";
return($"{item.Id:X8}.SceneRoad.xml");
}
if (headerStr.StartsWith("v ") ||
headerStr.StartsWith("vt ") ||
headerStr.StartsWith("f ")
)
{
category = "model";
return($"{item.Id:X8}.obj");
}
if (headerStr.StartsWith("CocosStudio-UI"))
{
category = "ui";
return($"{item.Id:X8}.csb");
}
if (headerStr.StartsWith("vec4") ||
headerStr.StartsWith("vec2") ||
headerStr.StartsWith("tex2D") ||
headerStr.StartsWith("tex3D") ||
headerStr.StartsWith("float") ||
headerStr.StartsWith("define") ||
headerStr.StartsWith("incloud") ||
headerStr.StartsWith("#if") ||
headerStr.StartsWith("#define") ||
headerStr.StartsWith("int ") ||
headerStr.StartsWith("precision ")
)
{
category = "shader";
return($"{item.Id:X8}.glsl");
}
if (headerStr.StartsWith("{"))
{
category = "json";
return($"{item.Id:X8}.json");
}
if (header.Length >= 32 && header[0] != 0 && header.Skip(16).Take(16).All(b => b == 0))
{
category = "unknown";
return($"{item.Id:X8}.unkAnim");
}
category = "";
return(item.Id.ToString("X8"));
}
var ext = result[0];
switch (ext)
{
case "jpg":
case "jpeg":
case "png":
case "gif":
case "ico":
case "bmp":
case "psd":
category = "image";
break;
case "xml":
category = "xml";
break;
case "ktx":
category = "texture";
break;
case "unkModel":
category = "unknown";
break;
default:
category = "";
break;
}
return($"{item.Id:X8}.{ext}");
}