From ca57d7ea5ff9eecef22d05ea9f3c5b7cf41f9a4e Mon Sep 17 00:00:00 2001
From: WyattBlue <wyattblue@auto-editor.com>
Date: Wed, 12 Mar 2025 23:04:04 -0400
Subject: [PATCH] Add encoder and decoder proc

---
 auto_editor/lang/palet.py  |  4 ++--
 auto_editor/lang/stdenv.py | 12 ++++++++++++
 docs/doc.pal               |  8 ++++++++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/auto_editor/lang/palet.py b/auto_editor/lang/palet.py
index 673539608..ac231fbe9 100644
--- a/auto_editor/lang/palet.py
+++ b/auto_editor/lang/palet.py
@@ -646,8 +646,8 @@ def pop(self) -> None:
 
 
 def my_eval(env: Env, node: object) -> Any:
-    def make_trace(sym: Sym) -> str:
-        return f"  at {sym.val} ({sym.lineno}:{sym.column})"
+    def make_trace(sym: object) -> str:
+        return f"  at {sym.val} ({sym.lineno}:{sym.column})" if type(sym) is Sym else ""
 
     if type(node) is Sym:
         val = env.get(node.val)
diff --git a/auto_editor/lang/stdenv.py b/auto_editor/lang/stdenv.py
index 581d76cdc..e6d737236 100644
--- a/auto_editor/lang/stdenv.py
+++ b/auto_editor/lang/stdenv.py
@@ -2,6 +2,8 @@
 
 from typing import TYPE_CHECKING
 
+import av
+
 from auto_editor.analyze import mut_remove_large, mut_remove_small
 from auto_editor.lib.contracts import *
 from auto_editor.lib.data_structs import *
@@ -749,6 +751,13 @@ def attr(env: Env, node: Node) -> Any:
             raise MyError("@r: attribute must be an identifier")
 
         base = my_eval(env, node[1])
+
+        if hasattr(base, "__pyx_vtable__"):
+            try:
+                return getattr(base, node[2].val)
+            except AttributeError as e:
+                raise MyError(e)
+
         if type(base) is PaletClass:
             if type(name := node[2]) is not Sym:
                 raise MyError("@r: class attribute must be an identifier")
@@ -1171,6 +1180,9 @@ def change_file_ext(a, ext) -> str:
             "string->vector", lambda s: [Char(c) for c in s], (1, 1), is_str
         ),
         "range->vector": Proc("range->vector", list, (1, 1), is_range),
+        # av
+        "encoder": Proc("encoder", lambda x: av.Codec(x, "w"), (1, 1), is_str),
+        "decoder": Proc("decoder", lambda x: av.Codec(x), (1, 1), is_str),
         # reflexion
         "var-exists?": Proc("var-exists?", lambda sym: sym.val in env, (1, 1), is_symbol),
         "rename": Syntax(syn_rename),
diff --git a/docs/doc.pal b/docs/doc.pal
index b81c56d9c..d14cf3739 100644
--- a/docs/doc.pal
+++ b/docs/doc.pal
@@ -819,6 +819,14 @@
             )
         )
     ]
+    "AV" #[
+        (proc "encoder" '((value str?) any)
+            (text "Returns av.Codec("'value", mode=\"w\")")
+        )
+        (proc "decoder" '((value str?) any)
+            (text "Returns av.Codec("'value", mode=\"r\")")
+        )
+    ]
     "Reflection" #[
         (syntax "quote" "body"
             (text