From fe0918bb65c828ec81ce904cece58d450c117eba Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan.ytdlp@gmail.com>
Date: Wed, 3 Aug 2022 17:47:38 +0530
Subject: [PATCH] Import ctypes only when necessary

Closes #4541
---
 yt_dlp/cookies.py | 7 ++++---
 yt_dlp/utils.py   | 9 +++++----
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/yt_dlp/cookies.py b/yt_dlp/cookies.py
index df8f97b44..1a164bb31 100644
--- a/yt_dlp/cookies.py
+++ b/yt_dlp/cookies.py
@@ -1,6 +1,5 @@
 import base64
 import contextlib
-import ctypes
 import http.cookiejar
 import json
 import os
@@ -876,10 +875,12 @@ def _decrypt_windows_dpapi(ciphertext, logger):
     References:
         - https://docs.microsoft.com/en-us/windows/win32/api/dpapi/nf-dpapi-cryptunprotectdata
     """
-    from ctypes.wintypes import DWORD
+
+    import ctypes
+    import ctypes.wintypes
 
     class DATA_BLOB(ctypes.Structure):
-        _fields_ = [('cbData', DWORD),
+        _fields_ = [('cbData', ctypes.wintypes.DWORD),
                     ('pbData', ctypes.POINTER(ctypes.c_char))]
 
     buffer = ctypes.create_string_buffer(ciphertext)
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index c0d9c6f79..c3ccb3a78 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -6,7 +6,6 @@
 import codecs
 import collections
 import contextlib
-import ctypes
 import datetime
 import email.header
 import email.utils
@@ -1983,6 +1982,7 @@ def __init__(self):
 
 # Cross-platform file locking
 if sys.platform == 'win32':
+    import ctypes
     import ctypes.wintypes
     import msvcrt
 
@@ -2362,9 +2362,10 @@ def fix_xml_ampersands(xml_str):
 def setproctitle(title):
     assert isinstance(title, str)
 
-    # ctypes in Jython is not complete
-    # http://bugs.jython.org/issue2148
-    if sys.platform.startswith('java'):
+    # Workaround for https://github.com/yt-dlp/yt-dlp/issues/4541
+    try:
+        import ctypes
+    except ImportError:
         return
 
     try: