examples(foundational): support multiple transports

examples/foundational/13e-whisper-mlx.py

@@ -18,9 +18,8 @@ from pipecat.pipeline.runner import PipelineRunner
 from pipecat.pipeline.task import PipelineParams, PipelineTask
 from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
 from pipecat.services.whisper.stt import MLXModel, WhisperSTTServiceMLX
-from pipecat.transports.base_transport import TransportParams
-from pipecat.transports.network.small_webrtc import SmallWebRTCTransport
-from pipecat.transports.network.webrtc_connection import SmallWebRTCConnection
+from pipecat.transports.base_transport import BaseTransport, TransportParams
+from pipecat.transports.services.daily import DailyParams
 
 load_dotenv(override=True)
 
@@ -52,16 +51,23 @@ class TranscriptionLogger(FrameProcessor):
             self._last_transcription_time = time.time()
 
 
-async def run_bot(webrtc_connection: SmallWebRTCConnection, _: argparse.Namespace):
-    logger.info(f"Starting bot")
+# We store functions so objects (e.g. SileroVADAnalyzer) don't get
+# instantiated. The function will be called when the desired transport gets
+# selected.
+transport_params = {
+    "daily": lambda: DailyParams(
+        audio_in_enabled=True,
+        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=STOP_SECS)),
+    ),
+    "webrtc": lambda: TransportParams(
+        audio_in_enabled=True,
+        vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=STOP_SECS)),
+    ),
+}
 
-    transport = SmallWebRTCTransport(
-        webrtc_connection=webrtc_connection,
-        params=TransportParams(
-            audio_in_enabled=True,
-            vad_analyzer=SileroVADAnalyzer(params=VADParams(stop_secs=STOP_SECS)),
-        ),
-    )
+
+async def run_example(transport: BaseTransport, _: argparse.Namespace):
+    logger.info(f"Starting bot")
 
     stt = WhisperSTTServiceMLX(model=MLXModel.LARGE_V3_TURBO)
 
@@ -80,6 +86,7 @@ async def run_bot(webrtc_connection: SmallWebRTCConnection, _: argparse.Namespac
     @transport.event_handler("on_client_disconnected")
     async def on_client_disconnected(transport, client):
         logger.info(f"Client disconnected")
+        await task.cancel()
 
     @transport.event_handler("on_client_closed")
     async def on_client_closed(transport, client):
@@ -94,4 +101,4 @@ async def run_bot(webrtc_connection: SmallWebRTCConnection, _: argparse.Namespac
 if __name__ == "__main__":
     from run import main
 
-    main()
+    main(run_example, transport_params=transport_params)