Implement VLC logging

app/trackmanager.py

@@ -1,7 +1,9 @@
 # Standard library imports
 from __future__ import annotations
 
+import ctypes
 import datetime as dt
+import platform
 import threading
 from time import sleep
 from typing import Optional
@@ -169,6 +171,36 @@ class _FadeTrack(QRunnable):
         self.player.stop()
 
 
+# Define the VLC callback function type
+VLC_LOG_CB = ctypes.CFUNCTYPE(
+    None,
+    ctypes.c_void_p,
+    ctypes.c_int,
+    ctypes.c_void_p,
+    ctypes.c_char_p,
+    ctypes.c_void_p,
+)
+
+# Determine the correct C library for vsnprintf based on the platform
+if platform.system() == "Windows":
+    libc = ctypes.CDLL("msvcrt")
+elif platform.system() == "Linux":
+    libc = ctypes.CDLL("libc.so.6")
+elif platform.system() == "Darwin":  # macOS
+    libc = ctypes.CDLL("libc.dylib")
+else:
+    raise OSError("Unsupported operating system")
+
+# Define the vsnprintf function
+libc.vsnprintf.argtypes = [
+    ctypes.c_char_p,
+    ctypes.c_size_t,
+    ctypes.c_char_p,
+    ctypes.c_void_p,
+]
+libc.vsnprintf.restype = ctypes.c_int
+
+
 class _Music:
     """
     Manage the playing of music tracks
@@ -183,6 +215,31 @@ class _Music:
         self.start_dt: Optional[dt.datetime] = None
         self.player_count: int = 0
 
+        # Set up logging
+        self._set_vlc_log()
+
+    @VLC_LOG_CB
+    def log_callback(data, level, ctx, fmt, args):
+        try:
+            # Create a ctypes string buffer to hold the formatted message
+            buf = ctypes.create_string_buffer(1024)
+
+            # Use vsnprintf to format the string with the va_list
+            libc.vsnprintf(buf, len(buf), fmt, args)
+
+            # Decode the formatted message
+            message = buf.value.decode("utf-8", errors="replace")
+            log.error("VLC logging: " + message)
+        except Exception as e:
+            log.error(f"Error in VLC log callback: {e}")
+
+    def _set_vlc_log(self):
+        try:
+            vlc.libvlc_log_set(self.VLC, self.log_callback, None)
+            log.info("VLC logging set up successfully")
+        except Exception as e:
+            log.error(f"Failed to set up VLC logging: {e}")
+
     def adjust_by_ms(self, ms: int) -> None:
         """Move player position by ms milliseconds"""