mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-23 21:55:34 +08:00
423 lines
16 KiB
C#
423 lines
16 KiB
C#
//! \file ArcUnityFS.cs
|
|
//! \date Tue Apr 04 22:27:22 2017
|
|
//! \brief Unity asset archive.
|
|
//
|
|
// Copyright (C) 2017 by morkt
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using System.IO;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using GameRes.Compression;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.Unity
|
|
{
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class UnityFSOpener : ArchiveFormat
|
|
{
|
|
public override string Tag { get { return "UNITY/FS"; } }
|
|
public override string Description { get { return "Unity game engine asset archive"; } }
|
|
public override uint Signature { get { return 0x74696E55; } } // 'UnityFS'
|
|
public override bool IsHierarchic { get { return true; } }
|
|
public override bool CanWrite { get { return false; } }
|
|
|
|
public UnityFSOpener ()
|
|
{
|
|
Extensions = new string[] { "", "unity3d" };
|
|
}
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
if (!file.View.AsciiEqual (0, "UnityFS\0"))
|
|
return null;
|
|
int arc_version = Binary.BigEndian (file.View.ReadInt32 (8));
|
|
if (arc_version != 6)
|
|
return null;
|
|
long data_offset;
|
|
byte[] index_data;
|
|
using (var input = file.CreateStream())
|
|
{
|
|
input.Position = 0xC;
|
|
input.ReadCString (Encoding.UTF8);
|
|
input.ReadCString (Encoding.UTF8);
|
|
long file_size = Binary.BigEndian (input.ReadInt64());
|
|
int packed_index_size = Binary.BigEndian (input.ReadInt32());
|
|
int index_size = Binary.BigEndian (input.ReadInt32());
|
|
int flags = Binary.BigEndian (input.ReadInt32());
|
|
long index_offset;
|
|
if (0 == (flags & 0x80))
|
|
{
|
|
index_offset = input.Position;
|
|
data_offset = index_offset + packed_index_size;
|
|
}
|
|
else
|
|
{
|
|
index_offset = file_size - packed_index_size;
|
|
data_offset = input.Position;
|
|
}
|
|
input.Position = index_offset;
|
|
var packed = input.ReadBytes (packed_index_size);
|
|
switch (flags & 0x3F)
|
|
{
|
|
case 0:
|
|
index_data = packed;
|
|
break;
|
|
case 1:
|
|
index_data = UnpackLzma (packed, index_size);
|
|
break;
|
|
case 3:
|
|
index_data = new byte[index_size];
|
|
Lz4Compressor.DecompressBlock (packed, packed.Length, index_data, index_data.Length);
|
|
break;
|
|
default:
|
|
return null;
|
|
}
|
|
}
|
|
var index = new AssetDeserializer (file, data_offset);
|
|
using (var input = new BinMemoryStream (index_data))
|
|
index.Parse (input);
|
|
var dir = index.LoadObjects();
|
|
return new UnityBundle (file, this, dir, index.Segments);
|
|
}
|
|
|
|
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
|
{
|
|
var uarc = (UnityBundle)arc;
|
|
Stream input = new BundleStream (uarc.File, uarc.Segments);
|
|
input = new StreamRegion (input, entry.Offset, entry.Size);
|
|
var aent = entry as AssetEntry;
|
|
if (null == aent || !aent.IsEncrypted)
|
|
return input;
|
|
using (input)
|
|
{
|
|
var data = new byte[entry.Size];
|
|
input.Read (data, 0, data.Length);
|
|
DecryptAsset (data);
|
|
return new BinMemoryStream (data);
|
|
}
|
|
}
|
|
|
|
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
|
|
{
|
|
var aent = entry as AssetEntry;
|
|
if (null == aent || aent.AssetObject.Type != "Texture2D")
|
|
return base.OpenImage (arc, entry);
|
|
var uarc = (UnityBundle)arc;
|
|
var obj = aent.AssetObject;
|
|
Stream input = new BundleStream (uarc.File, uarc.Segments);
|
|
input = new StreamRegion (input, obj.Offset, obj.Size);
|
|
var reader = new AssetReader (input, entry.Name);
|
|
reader.SetupReaders (obj.Asset);
|
|
var tex = new Texture2D();
|
|
tex.Load (reader);
|
|
return new Texture2DDecoder (tex, reader);
|
|
}
|
|
|
|
internal static byte[] UnpackLzma (byte[] input, int unpacked_size)
|
|
{
|
|
throw new NotImplementedException();
|
|
}
|
|
|
|
internal void DecryptAsset (byte[] data)
|
|
{
|
|
uint key = 0xBF8766F5u;
|
|
for (int i = 0; i < data.Length; ++i)
|
|
{
|
|
key = ((0x343FD * key + 0x269EC3) >> 16) & 0x7FFF; // MSVC rand()
|
|
data[i] ^= (byte)key;
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class BundleEntry : Entry
|
|
{
|
|
public uint Flags;
|
|
}
|
|
|
|
internal class AssetEntry : Entry
|
|
{
|
|
public BundleEntry Bundle;
|
|
public UnityObject AssetObject;
|
|
public bool IsEncrypted;
|
|
}
|
|
|
|
internal class UnityBundle : ArcFile
|
|
{
|
|
public readonly List<BundleSegment> Segments;
|
|
|
|
public UnityBundle (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, List<BundleSegment> segments)
|
|
: base (arc, impl, dir)
|
|
{
|
|
Segments = segments;
|
|
}
|
|
}
|
|
|
|
internal class BundleSegment
|
|
{
|
|
public long Offset;
|
|
public uint PackedSize;
|
|
public long UnpackedOffset;
|
|
public uint UnpackedSize;
|
|
public int Compression;
|
|
|
|
public bool IsCompressed { get { return (Compression & 0x3F) != 0; } }
|
|
}
|
|
|
|
internal class AssetDeserializer
|
|
{
|
|
readonly ArcView m_file;
|
|
readonly long m_data_offset;
|
|
List<BundleSegment> m_segments;
|
|
List<BundleEntry> m_bundles;
|
|
|
|
public List<BundleSegment> Segments { get { return m_segments; } }
|
|
|
|
public AssetDeserializer (ArcView file, long data_offset)
|
|
{
|
|
m_file = file;
|
|
m_data_offset = data_offset;
|
|
}
|
|
|
|
public void Parse (IBinaryStream index)
|
|
{
|
|
index.Position = 16;
|
|
int segment_count = Binary.BigEndian (index.ReadInt32());
|
|
m_segments = new List<BundleSegment> (segment_count);
|
|
long packed_offset = m_data_offset;
|
|
long unpacked_offset = 0;
|
|
for (int i = 0; i < segment_count; ++i)
|
|
{
|
|
var segment = new BundleSegment();
|
|
segment.Offset = packed_offset;
|
|
segment.UnpackedOffset = unpacked_offset;
|
|
segment.UnpackedSize = Binary.BigEndian (index.ReadUInt32());
|
|
segment.PackedSize = Binary.BigEndian (index.ReadUInt32());
|
|
segment.Compression = Binary.BigEndian (index.ReadUInt16());
|
|
m_segments.Add (segment);
|
|
packed_offset += segment.PackedSize;
|
|
unpacked_offset += segment.UnpackedSize;
|
|
}
|
|
int count = Binary.BigEndian (index.ReadInt32());
|
|
m_bundles = new List<BundleEntry> (count);
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
var entry = new BundleEntry();
|
|
entry.Offset = Binary.BigEndian (index.ReadInt64());
|
|
entry.Size = (uint)Binary.BigEndian (index.ReadInt64());
|
|
entry.Flags = Binary.BigEndian (index.ReadUInt32());
|
|
entry.Name = index.ReadCString (Encoding.UTF8);
|
|
m_bundles.Add (entry);
|
|
}
|
|
}
|
|
|
|
public List<Entry> LoadObjects ()
|
|
{
|
|
var dir = new List<Entry>();
|
|
using (var stream = new BundleStream (m_file, m_segments))
|
|
{
|
|
foreach (BundleEntry bundle in m_bundles)
|
|
{
|
|
if (bundle.Name.EndsWith (".resource"))
|
|
continue;
|
|
using (var asset_stream = new StreamRegion (stream, bundle.Offset, bundle.Size, true))
|
|
using (var reader = new AssetReader (asset_stream, bundle.Name))
|
|
{
|
|
var asset = new Asset();
|
|
asset.Load (reader);
|
|
var object_dir = ParseAsset (stream, bundle, asset);
|
|
dir.AddRange (object_dir);
|
|
}
|
|
}
|
|
if (0 == dir.Count)
|
|
dir.AddRange (m_bundles);
|
|
}
|
|
return dir;
|
|
}
|
|
|
|
IEnumerable<Entry> ParseAsset (Stream file, BundleEntry bundle, Asset asset)
|
|
{
|
|
Dictionary<long, string> id_map = null;
|
|
var bundle_types = asset.Tree.TypeTrees.Where (t => t.Value.Type == "AssetBundle").Select (t => t.Key);
|
|
if (bundle_types.Any())
|
|
{
|
|
// try to read entry names from AssetBundle object
|
|
int bundle_type_id = bundle_types.First();
|
|
var asset_bundle = asset.Objects.FirstOrDefault (x => x.TypeId == bundle_type_id);
|
|
if (asset_bundle != null)
|
|
{
|
|
id_map = ReadAssetBundle (file, asset_bundle);
|
|
}
|
|
}
|
|
if (null == id_map)
|
|
id_map = new Dictionary<long, string>();
|
|
foreach (var obj in asset.Objects)
|
|
{
|
|
var entry = ReadAsset (file, obj);
|
|
if (null == entry.Bundle)
|
|
entry.Bundle = bundle;
|
|
string name;
|
|
if (!id_map.TryGetValue (obj.PathId, out name))
|
|
name = GetObjectName (file, obj);
|
|
else
|
|
name = ShortenPath (name);
|
|
entry.Name = name;
|
|
yield return entry;
|
|
}
|
|
}
|
|
|
|
AssetEntry ReadAsset (Stream file, UnityObject obj)
|
|
{
|
|
string type = obj.Type;
|
|
if ("AudioClip" == type)
|
|
return ReadAudioClip (file, obj);
|
|
else if ("TextAsset" == type)
|
|
return ReadTextAsset (file, obj);
|
|
else if ("Texture2D" == type)
|
|
type = "image";
|
|
|
|
return new AssetEntry {
|
|
Type = type,
|
|
AssetObject = obj,
|
|
Offset = obj.Offset,
|
|
Size = obj.Size,
|
|
};
|
|
}
|
|
|
|
Dictionary<long, string> ReadAssetBundle (Stream input, UnityObject bundle)
|
|
{
|
|
using (var reader = bundle.Open (input))
|
|
{
|
|
var name = reader.ReadString(); // m_Name
|
|
reader.Align();
|
|
int count = reader.ReadInt32(); // m_PreloadTable
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
reader.ReadInt32(); // m_FileID
|
|
reader.ReadInt64(); // m_PathID
|
|
}
|
|
count = reader.ReadInt32(); // m_Container
|
|
var id_map = new Dictionary<long, string> (count+1);
|
|
id_map[bundle.PathId] = name;
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
name = reader.ReadString();
|
|
reader.Align();
|
|
reader.ReadInt32(); // preloadIndex
|
|
reader.ReadInt32(); // preloadSize
|
|
reader.ReadInt32(); // m_FileID
|
|
long id = reader.ReadInt64();
|
|
id_map[id] = name;
|
|
}
|
|
return id_map;
|
|
}
|
|
}
|
|
|
|
string GetObjectName (Stream input, UnityObject obj)
|
|
{
|
|
TypeTree type;
|
|
if (obj.Asset.Tree.TypeTrees.TryGetValue (obj.TypeId, out type) && type.Children.Count > 0)
|
|
{
|
|
var first_field = type.Children[0];
|
|
if ("m_Name" == first_field.Name && "string" == first_field.Type)
|
|
{
|
|
using (var reader = obj.Open (input))
|
|
{
|
|
var name = reader.ReadString();
|
|
if (!string.IsNullOrEmpty (name))
|
|
return name;
|
|
}
|
|
}
|
|
}
|
|
return obj.PathId.ToString ("X16");
|
|
}
|
|
|
|
AssetEntry ReadTextAsset (Stream input, UnityObject obj)
|
|
{
|
|
var type_def = obj.Asset.Tree.TypeTrees[obj.TypeId];
|
|
var script = type_def.Children.FirstOrDefault (f => f.Name == "m_Script");
|
|
if (null == script)
|
|
return null;
|
|
using (var reader = obj.Open (input))
|
|
{
|
|
var name = reader.ReadString();
|
|
reader.Align();
|
|
uint size = reader.ReadUInt32();
|
|
var entry = new AssetEntry {
|
|
AssetObject = obj,
|
|
Offset = obj.Offset + reader.Position,
|
|
Size = size,
|
|
IsEncrypted = 0 != (script.Flags & 0x04000000),
|
|
};
|
|
if (entry.IsEncrypted)
|
|
{
|
|
uint signature = reader.ReadUInt32();
|
|
if (0x0D15F641 == signature)
|
|
entry.Type = "image";
|
|
else if (0x474E5089 == signature)
|
|
{
|
|
entry.Type = "image";
|
|
entry.IsEncrypted = false;
|
|
}
|
|
}
|
|
return entry;
|
|
}
|
|
}
|
|
|
|
AssetEntry ReadAudioClip (Stream input, UnityObject obj)
|
|
{
|
|
using (var reader = obj.Open (input))
|
|
{
|
|
var clip = new AudioClip();
|
|
clip.Load (reader);
|
|
var bundle_name = Path.GetFileName (clip.m_Source);
|
|
var bundle = m_bundles.FirstOrDefault (b => b.Name == bundle_name);
|
|
if (null == bundle)
|
|
return null;
|
|
return new AssetEntry {
|
|
Type = "audio",
|
|
Bundle = bundle,
|
|
AssetObject = obj,
|
|
Offset = bundle.Offset + clip.m_Offset,
|
|
Size = (uint)clip.m_Size,
|
|
};
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Shorten asset path to contain only the bottom directory component.
|
|
/// </summary>
|
|
static string ShortenPath (string name)
|
|
{
|
|
int slash_pos = name.LastIndexOf ('/');
|
|
if (-1 == slash_pos)
|
|
return name;
|
|
slash_pos = name.LastIndexOf ('/', slash_pos-1);
|
|
if (-1 == slash_pos)
|
|
return name;
|
|
return name.Substring (slash_pos+1);
|
|
}
|
|
}
|
|
}
|