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#
# Copyright (c) 2024, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#
import asyncio
from pipecat.frames.frames import EndFrame, Frame, StartInterruptionFrame
from pipecat.processors.frame_processor import FrameDirection, FrameProcessor
class AsyncFrameProcessor(FrameProcessor):
def __init__(
self,
*,
name: str | None = None,
loop: asyncio.AbstractEventLoop | None = None,
**kwargs):
super().__init__(name=name, loop=loop, **kwargs)
self._create_push_task()
async def process_frame(self, frame: Frame, direction: FrameDirection):
await super().process_frame(frame, direction)
if isinstance(frame, StartInterruptionFrame):
await self._handle_interruptions(frame)
async def queue_frame(
self,
frame: Frame,
direction: FrameDirection = FrameDirection.DOWNSTREAM):
await self._push_queue.put((frame, direction))
async def cleanup(self):
self._push_frame_task.cancel()
await self._push_frame_task
async def _handle_interruptions(self, frame: Frame):
# Cancel the task. This will stop pushing frames downstream.
self._push_frame_task.cancel()
await self._push_frame_task
# Push an out-of-band frame (i.e. not using the ordered push
# frame task).
await self.push_frame(frame)
# Create a new queue and task.
self._create_push_task()
def _create_push_task(self):
self._push_queue = asyncio.Queue()
self._push_frame_task = self.get_event_loop().create_task(self._push_frame_task_handler())
async def _push_frame_task_handler(self):
running = True
while running:
try:
(frame, direction) = await self._push_queue.get()
await self.push_frame(frame, direction)
running = not isinstance(frame, EndFrame)
except asyncio.CancelledError:
break
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