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,
});
}
}
string GetObjectName(Stream input, UnityObject obj)
{
var type = obj.Type;
if (type != null && 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"));
}
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 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,
});
}
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);
}
}
