transports: allow sending metrics

src/pipecat/frames/frames.py

@@ -241,7 +241,7 @@ class StopInterruptionFrame(SystemFrame):
 
 @dataclass
 class MetricsFrame(SystemFrame):
-    """Emitted by processor who can compute metrics like latencies.
+    """Emitted by processor that can compute metrics like latencies.
     """
     ttfb: Mapping[str, float]
 

src/pipecat/transports/base_output.py

@@ -20,6 +20,7 @@
 from pipecat.frames.frames import (
     AudioRawFrame,
     CancelFrame,
+    MetricsFrame,
     SpriteFrame,
     StartFrame,
     EndFrame,
@@ -87,6 +88,9 @@ async def stop(self):
     def send_message(self, frame: TransportMessageFrame):
         pass
 
+    def send_metrics(self, frame: MetricsFrame):
+        pass
+
     def write_frame_to_camera(self, frame: ImageRawFrame):
         pass
 
@@ -166,6 +170,8 @@ def _sink_thread_handler(self):
                         self._set_camera_images(frame.images)
                     elif isinstance(frame, TransportMessageFrame):
                         self.send_message(frame)
+                    elif isinstance(frame, MetricsFrame):
+                        self.send_metrics(frame)
                     else:
                         future = asyncio.run_coroutine_threadsafe(
                             self._internal_push_frame(frame), self.get_event_loop())

src/pipecat/transports/services/daily.py

@@ -27,6 +27,7 @@
     Frame,
     ImageRawFrame,
     InterimTranscriptionFrame,
+    MetricsFrame,
     SpriteFrame,
     StartFrame,
     TranscriptionFrame,
@@ -638,6 +639,16 @@ async def cleanup(self):
     def send_message(self, frame: DailyTransportMessageFrame):
         self._client.send_message(frame)
 
+    def send_metrics(self, frame: MetricsFrame):
+        ttfb = [{"name": n, "time": t} for n, t in frame.ttfb.items()]
+        message = DailyTransportMessageFrame(message={
+            "type": "pipecat-metrics",
+            "metrics": {
+                "ttfb": ttfb
+            },
+        })
+        self._client.send_message(message)
+
     def write_raw_audio_frames(self, frames: bytes):
         self._client.write_raw_audio_frames(frames)
 
@@ -711,7 +722,7 @@ def output(self) -> FrameProcessor:
     # DailyTransport
     #
 
-    @property
+    @ property
     def participant_id(self) -> str:
         return self._client.participant_id