function calling: start callback should have function name first

src/pipecat/processors/frameworks/rtvi.py

@@ -323,9 +323,9 @@ class RTVIProcessor(FrameProcessor):
 
     async def handle_function_call_start(
             self,
+            function_name: str,
             llm: FrameProcessor,
-            context: OpenAILLMContext,
-            function_name: str):
+            context: OpenAILLMContext):
         fn = RTVILLMFunctionCallStartMessageData(function_name=function_name)
         message = RTVILLMFunctionCallStartMessage(data=fn)
         await self._push_transport_message(message, exclude_none=False)

src/pipecat/services/ai_services.py

@@ -140,9 +140,9 @@ class LLMService(AIService):
     # QUESTION FOR CB: maybe this isn't needed anymore?
     async def call_start_function(self, context: OpenAILLMContext, function_name: str):
         if function_name in self._start_callbacks.keys():
-            await self._start_callbacks[function_name](self, context, function_name)
+            await self._start_callbacks[function_name](function_name, self, context)
         elif None in self._start_callbacks.keys():
-            return await self._start_callbacks[None](self, context, function_name)
+            return await self._start_callbacks[None](function_name, self, context)
 
     async def request_image_frame(self, user_id: str, *, text_content: str | None = None):
         await self.push_frame(UserImageRequestFrame(user_id=user_id, context=text_content),