fix: Renamings

Author: tmathern

src/c2pa/c2pa.py

@@ -1123,13 +1123,14 @@ def flush_callback(ctx):
         self._write_cb = WriteCallback(write_callback)
         self._flush_cb = FlushCallback(flush_callback)
 
-        # Create a dummy context since Python callbacks don't use it
-        # We create a small buffer and cast it to a StreamContext pointer
-        self._dummy_context = ctypes.create_string_buffer(1)  # Create a 1-byte buffer
-        
+        # Create a (placeholder) context we don't actually use the context,
+        # but we need having a valid context pointer. Therefore, we create
+        # a small buffer and cast it to a StreamContext pointer
+        self._placeholder_context = ctypes.create_string_buffer(1)
+
         # Create the stream
         self._stream = _lib.c2pa_create_stream(
-            ctypes.cast(self._dummy_context, ctypes.POINTER(StreamContext)),  # context
+            ctypes.cast(self._placeholder_context, ctypes.POINTER(StreamContext)),  # context
             self._read_cb,
             self._seek_cb,
             self._write_cb,