diff --git a/src/asset.rs b/src/asset.rs
new file mode 100644
index 0000000..5d10514
--- /dev/null
+++ b/src/asset.rs
@@ -0,0 +1,65 @@
+use std::ffi::OsStr;
+use std::fs;
+use std::fs::DirEntry;
+use std::fs::File;
+use std::io::BufRead;
+use std::io::BufReader;
+use std::path::{Path, PathBuf};
+
+#[derive(Clone)]
+pub struct Asset {
+    pub extension: Option<String>,
+    pub hash: String,
+    pub path_name: String,
+    pub has_meta: bool,
+}
+
+impl Asset {
+    pub fn from_path(entry: &DirEntry) -> Option<Asset> {
+        let root_file = entry.path();
+        if !root_file.is_dir() {
+            return None;
+        }
+        let asset = entry.file_name().into_string().unwrap();
+        let mut real_path = String::new();
+        let mut extension = None;
+        let mut has_asset = false;
+        let mut has_meta = false;
+        for sub_entry in fs::read_dir(root_file.clone()).unwrap() {
+            let sub_entry = sub_entry.unwrap();
+            let file_name = sub_entry.file_name().into_string().unwrap();
+            match file_name.as_str() {
+                "pathname" => {
+                    let path = sub_entry.path();
+                    let file = File::open(path).unwrap();
+                    let buf_reader = BufReader::new(file);
+                    let line = buf_reader.lines().next();
+                    match line {
+                        Some(Ok(path)) => {
+                            real_path = path;
+                            if let Some(e) =
+                                Path::new(&real_path).extension().and_then(OsStr::to_str)
+                            {
+                                extension = Some(String::from(e));
+                            }
+                        }
+                        _ => continue,
+                    }
+                }
+                "asset" => has_asset = true,
+                "asset.meta" => has_meta = true,
+                _ => continue,
+            }
+        }
+        if has_asset {
+            Some(Asset {
+                extension,
+                hash: asset,
+                path_name: real_path,
+                has_meta,
+            })
+        } else {
+            None
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index ebdc15a..785f87e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,15 +1,9 @@
 mod args;
+pub mod asset;
 mod unpacker;
 
 use clap::Parser;
 
-
-
-
-
-
-
-
 fn main() {
     let args = crate::args::Args::parse();
     let unpacker = crate::unpacker::Unpacker { args };
diff --git a/src/unpacker.rs b/src/unpacker.rs
index a6659a8..655b7d0 100644
--- a/src/unpacker.rs
+++ b/src/unpacker.rs
@@ -1,16 +1,16 @@
+use crate::asset::Asset;
 use flate2::read::GzDecoder;
 use hashbrown::HashMap;
+use rayon::prelude::*;
 use std::ffi::OsStr;
 use std::fs::File;
 use std::io::BufRead;
 use std::io::BufReader;
 use std::path::{Path, PathBuf};
 use std::process::Command;
+use std::sync::mpsc::channel;
 use std::sync::Arc;
 use std::{fs, io};
-
-use rayon::prelude::*;
-use std::sync::mpsc::channel;
 use tar::Archive;
 
 #[derive(Clone)]
@@ -52,54 +52,28 @@ impl Unpacker {
             .par_bridge()
             .for_each_with(sender, |s, entry| {
                 let entry = entry.unwrap();
-                let root_file = entry.path();
-                let asset = entry.file_name().into_string().unwrap();
-                if !root_file.is_dir() {
-                    return;
-                }
-                let mut real_path = String::new();
-                let mut extension = None;
-                let mut has_asset = false;
-                for sub_entry in fs::read_dir(root_file.clone()).unwrap() {
-                    let sub_entry = sub_entry.unwrap();
-                    let file_name = sub_entry.file_name().into_string().unwrap();
-                    if file_name == "pathname" {
-                        let path = sub_entry.path();
-                        let file = File::open(path).unwrap();
-                        let buf_reader = BufReader::new(file);
-                        let line = buf_reader.lines().next();
-                        match line {
-                            Some(Ok(path)) => {
-                                real_path = path;
-                                if let Some(e) =
-                                    Path::new(&real_path).extension().and_then(OsStr::to_str)
-                                {
-                                    extension = Some(String::from(e));
-                                }
-                            }
-                            _ => continue,
-                        }
-                    } else if file_name == "asset" {
-                        has_asset = true;
+                let asset = crate::asset::Asset::from_path(&entry);
+                if let Some(asset) = asset {
+                    let extension = &asset.extension.clone().unwrap_or_default();
+                    if !ignored_extensions.contains(extension) {
+                        s.send(asset).unwrap();
                     }
                 }
-                if has_asset && !ignored_extensions.contains(&extension.unwrap_or_default()) {
-                    s.send((asset, real_path)).unwrap();
-                }
             });
 
         let tmp_dir = Arc::new(tmp_path);
         fs::create_dir(output_dir).unwrap();
         let output_dir = Arc::new(output_dir);
-        let mapping: HashMap<String, String> = receiver.iter().collect();
+        let mapping: Vec<Asset> = receiver.iter().collect();
         let mapping_arc = Arc::new(mapping);
 
-        mapping_arc.par_iter().for_each(|(asset_hash, asset_path)| {
-            let path = Path::new(asset_path);
+        mapping_arc.par_iter().for_each(|(asset)| {
+            let asset_hash = &asset.hash;
+            let path = Path::new(&asset.path_name);
             let source_asset = Path::new(&*tmp_dir).join(asset_hash).join("asset");
             let result_path = output_dir.join(path);
 
-            process_directory(asset_hash, asset_path, &result_path);
+            process_directory(asset_hash, &asset.path_name, &result_path);
             check_source_asset_exists(&source_asset);
 
             if self.args.fbx_to_gltf.is_some() {