GARbro-mirror/ArcFormats/Unity/ArcASSET.cs

274 lines
10 KiB
C#

//! \file ArcASSET.cs
//! \date 2017 Nov 22
//! \brief Unity assets 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using GameRes.Utility;
namespace GameRes.Formats.Unity
{
[Export(typeof(ArchiveFormat))]
public class UnityAssetOpener : ArchiveFormat
{
public override string Tag { get { return "ASSETS/UNITY"; } }
public override string Description { get { return "Unity game engine assets archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
uint header_size = Binary.BigEndian (file.View.ReadUInt32 (0));
uint file_size = Binary.BigEndian (file.View.ReadUInt32 (4));
if (file_size != file.MaxOffset || header_size > file_size || 0 == header_size)
return null;
int format = Binary.BigEndian (file.View.ReadInt32 (8));
uint data_offset = Binary.BigEndian (file.View.ReadUInt32 (12));
if (format <= 0 || format > 0x100 || data_offset >= file_size || data_offset < header_size)
return null;
using (var stream = file.CreateStream())
using (var input = new AssetReader (stream))
{
var index = new ResourcesAssetsDeserializer (file);
var dir = index.Parse (input);
if (null == dir || 0 == dir.Count)
return null;
var res_map = index.GenerateResourceMap (dir);
return new UnityResourcesAsset (file, this, dir, res_map);
}
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var uarc = (UnityResourcesAsset)arc;
var uent = (AssetEntry)entry;
if (null == uent.Bundle || !uarc.ResourceMap.ContainsKey (uent.Bundle.Name))
return arc.File.CreateStream (entry.Offset, entry.Size);
var bundle = uarc.ResourceMap[uent.Bundle.Name];
return bundle.CreateStream (entry.Offset, entry.Size);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
var aent = entry as AssetEntry;
if (null == aent || aent.AssetObject.TypeId != 28)
return base.OpenImage (arc, entry);
var obj = aent.AssetObject;
using (var stream = arc.File.CreateStream (obj.Offset, obj.Size))
using (var reader = new AssetReader (stream))
{
reader.SetupReaders (obj.Asset);
var tex = new Texture2D();
tex.Load (reader);
var input = OpenEntry (arc, entry);
try
{
tex.m_Data = new byte[entry.Size];
input.Read (tex.m_Data, 0, tex.m_Data.Length);
var tex_reader = new AssetReader (input, entry.Name);
tex_reader.SetupReaders (obj.Asset);
return new Texture2DDecoder (tex, tex_reader);
}
catch
{
input.Dispose();
throw;
}
}
}
}
internal class UnityResourcesAsset : ArcFile
{
public readonly IDictionary<string, ArcView> ResourceMap;
public UnityResourcesAsset (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, IDictionary<string, ArcView> res_map)
: base (arc, impl, dir)
{
ResourceMap = res_map;
}
#region IDisposable Members
bool m_disposed = false;
protected override void Dispose (bool disposing)
{
if (!m_disposed)
{
if (disposing)
{
foreach (var res in ResourceMap.Values)
{
res.Dispose();
}
}
m_disposed = true;
}
}
#endregion
}
internal class ResourcesAssetsDeserializer
{
string m_res_name;
Dictionary<string, BundleEntry> m_bundles;
public ResourcesAssetsDeserializer (ArcView file)
{
m_res_name = file.Name;
}
public List<Entry> Parse (AssetReader input)
{
var asset = new Asset();
asset.Load (input);
var dir = new List<Entry>();
m_bundles = new Dictionary<string, BundleEntry>();
var used_names = new HashSet<string>();
foreach (var obj in asset.Objects.Where (o => o.TypeId > 0))
{
input.Position = obj.Offset;
AssetEntry entry = null;
switch (obj.TypeId)
{
default:
break;
case 28: // Texture2D
{
var tex = new Texture2D();
tex.Load (input);
if (null == tex.m_Data || 0 == tex.m_Data.Length)
{
if (asset.Tree.Version == "2017.2.0f3")
input.ReadInt64();
var stream_data = new StreamingInfo();
stream_data.Load (input);
if (!string.IsNullOrEmpty (stream_data.Path))
{
entry = new AssetEntry {
Name = tex.m_Name,
Type = "image",
Offset = stream_data.Offset,
Size = stream_data.Size,
Bundle = GetBundle (stream_data.Path),
};
}
}
break;
}
case 83: // AudioClip
{
var clip = new AudioClip();
clip.Load (input);
if (!string.IsNullOrEmpty (clip.m_Source))
{
entry = new AssetEntry {
Name = clip.m_Name,
Type = "audio",
Offset = clip.m_Offset,
Size = (uint)clip.m_Size,
Bundle = GetBundle (clip.m_Source),
};
}
break;
}
case 49: // TextAsset
{
var name = input.ReadString();
input.Align();
uint size = input.ReadUInt32();
entry = new AssetEntry {
Name = name,
Offset = input.Position,
Size = size,
};
if (name.HasAnyOfExtensions ("jpg", "png"))
entry.Type = "image";
break;
}
case 128: // Font
{
entry = new AssetEntry {
Offset = obj.Offset,
Size = obj.Size,
};
break;
}
}
if (entry != null)
{
entry.AssetObject = obj;
if (string.IsNullOrEmpty (entry.Name))
entry.Name = string.Format ("{0:D4} [{1}]", obj.PathId, obj.TypeId);
else if (!used_names.Add (entry.Name))
entry.Name = string.Format ("{0}-{1}", entry.Name, obj.PathId);
dir.Add (entry);
}
}
return dir;
}
public Dictionary<string, ArcView> GenerateResourceMap (List<Entry> dir)
{
var res_map = new Dictionary<string, ArcView>();
var asset_dir = VFS.GetDirectoryName (m_res_name);
foreach (AssetEntry entry in dir)
{
if (null == entry.Bundle)
continue;
if (res_map.ContainsKey (entry.Bundle.Name))
continue;
var bundle_name = VFS.CombinePath (asset_dir, entry.Bundle.Name);
if (!VFS.FileExists (bundle_name))
{
entry.Bundle = null;
entry.Offset = entry.AssetObject.Offset;
entry.Size = entry.AssetObject.Size;
continue;
}
res_map[entry.Bundle.Name] = VFS.OpenView (bundle_name);
}
return res_map;
}
BundleEntry GetBundle (string path)
{
BundleEntry bundle;
if (!m_bundles.TryGetValue (path, out bundle))
{
bundle = new BundleEntry { Name = path };
m_bundles[path] = bundle;
}
return bundle;
}
}
}