webrtcd: lazy import of aiortc (#31304)

* Lazy imports in webrtcd

* Lazy imports in web.py

* Type hints

* Remove FrameReaderVideoStreamTrack

* leave the aiohttp.web import

* Leave the client session

* main leftover

system/webrtc/device/video.py

@@ -5,7 +5,6 @@ import av
 from teleoprtc.tracks import TiciVideoStreamTrack
 
 from cereal import messaging
-from openpilot.tools.lib.framereader import FrameReader
 from openpilot.common.realtime import DT_MDL, DT_DMON
 
 
@@ -43,27 +42,3 @@ class LiveStreamVideoStreamTrack(TiciVideoStreamTrack):
 
   def codec_preference(self) -> Optional[str]:
     return "H264"
-
-
-class FrameReaderVideoStreamTrack(TiciVideoStreamTrack):
-  def __init__(self, input_file: str, dt: float = DT_MDL, camera_type: str = "driver"):
-    super().__init__(camera_type, dt)
-
-    frame_reader = FrameReader(input_file)
-    self._frames = [frame_reader.get(i, pix_fmt="rgb24") for i in range(frame_reader.frame_count)]
-    self._frame_count = len(self.frames)
-    self._frame_index = 0
-    self._pts = 0
-
-  async def recv(self):
-    self.log_debug("track sending frame %s", self._pts)
-    img = self._frames[self._frame_index]
-
-    new_frame = av.VideoFrame.from_ndarray(img, format="rgb24")
-    new_frame.pts = self._pts
-    new_frame.time_base = self._time_base
-
-    self._frame_index = (self._frame_index + 1) % self._frame_count
-    self._pts = await self.next_pts(self._pts)
-
-    return new_frame

system/webrtc/webrtcd.py

@@ -6,34 +6,27 @@ import json
 import uuid
 import logging
 from dataclasses import dataclass, field
-from typing import Any, List, Optional, Union
+from typing import Any, List, Optional, Union, TYPE_CHECKING
 
 # aiortc and its dependencies have lots of internal warnings :(
 import warnings
 warnings.filterwarnings("ignore", category=DeprecationWarning)
 
-import aiortc
-from aiortc.mediastreams import VideoStreamTrack, AudioStreamTrack
-from aiortc.contrib.media import MediaBlackhole
-from aiortc.exceptions import InvalidStateError
-from aiohttp import web
 import capnp
-from teleoprtc import WebRTCAnswerBuilder
-from teleoprtc.info import parse_info_from_offer
+from aiohttp import web
+if TYPE_CHECKING:
+  from aiortc.rtcdatachannel import RTCDataChannel
 
-from openpilot.system.webrtc.device.video import LiveStreamVideoStreamTrack
-from openpilot.system.webrtc.device.audio import AudioInputStreamTrack, AudioOutputSpeaker
 from openpilot.system.webrtc.schema import generate_field
-
 from cereal import messaging, log
 
 
 class CerealOutgoingMessageProxy:
   def __init__(self, sm: messaging.SubMaster):
     self.sm = sm
-    self.channels: List[aiortc.RTCDataChannel] = []
+    self.channels: List['RTCDataChannel'] = []
 
-  def add_channel(self, channel: aiortc.RTCDataChannel):
+  def add_channel(self, channel: 'RTCDataChannel'):
     self.channels.append(channel)
 
   def to_json(self, msg_content: Any):
@@ -96,6 +89,8 @@ class CerealProxyRunner:
     self.task = None
 
   async def run(self):
+    from aiortc.exceptions import InvalidStateError
+
     while True:
       try:
         self.proxy.update()
@@ -109,6 +104,13 @@ class CerealProxyRunner:
 
 class StreamSession:
   def __init__(self, sdp: str, cameras: List[str], incoming_services: List[str], outgoing_services: List[str], debug_mode: bool = False):
+    from aiortc.mediastreams import VideoStreamTrack, AudioStreamTrack
+    from aiortc.contrib.media import MediaBlackhole
+    from openpilot.system.webrtc.device.video import LiveStreamVideoStreamTrack
+    from openpilot.system.webrtc.device.audio import AudioInputStreamTrack, AudioOutputSpeaker
+    from teleoprtc import WebRTCAnswerBuilder
+    from teleoprtc.info import parse_info_from_offer
+
     config = parse_info_from_offer(sdp)
     builder = WebRTCAnswerBuilder(sdp)
 
@@ -192,7 +194,7 @@ class StreamRequestBody:
   bridge_services_out: List[str] = field(default_factory=list)
 
 
-async def get_stream(request: web.Request):
+async def get_stream(request: 'web.Request'):
   stream_dict, debug_mode = request.app['streams'], request.app['debug']
   raw_body = await request.json()
   body = StreamRequestBody(**raw_body)
@@ -206,7 +208,7 @@ async def get_stream(request: web.Request):
   return web.json_response({"sdp": answer.sdp, "type": answer.type})
 
 
-async def get_schema(request: web.Request):
+async def get_schema(request: 'web.Request'):
   services = request.query["services"].split(",")
   services = [s for s in services if s]
   assert all(s in log.Event.schema.fields and not s.endswith("DEPRECATED") for s in services), "Invalid service name"
@@ -214,7 +216,7 @@ async def get_schema(request: web.Request):
   return web.json_response(schema_dict)
 
 
-async def on_shutdown(app: web.Application):
+async def on_shutdown(app: 'web.Application'):
   for session in app['streams'].values():
     session.stop()
   del app['streams']

tools/bodyteleop/web.py

@@ -6,9 +6,10 @@ import os
 import ssl
 import subprocess
 
-from aiohttp import web, ClientSession
 import pyaudio
 import wave
+from aiohttp import web
+from aiohttp import ClientSession
 
 from openpilot.common.basedir import BASEDIR
 from openpilot.system.webrtc.webrtcd import StreamRequestBody
@@ -22,7 +23,7 @@ WEBRTCD_HOST, WEBRTCD_PORT = "localhost", 5001
 
 
 ## UTILS
-async def play_sound(sound):
+async def play_sound(sound: str):
   SOUNDS = {
     "engage": "selfdrive/assets/sounds/engage.wav",
     "disengage": "selfdrive/assets/sounds/disengage.wav",
@@ -51,7 +52,7 @@ async def play_sound(sound):
     p.terminate()
 
 ## SSL
-def create_ssl_cert(cert_path, key_path):
+def create_ssl_cert(cert_path: str, key_path: str):
   try:
     proc = subprocess.run(f'openssl req -x509 -newkey rsa:4096 -nodes -out {cert_path} -keyout {key_path} \
                           -days 365 -subj "/C=US/ST=California/O=commaai/OU=comma body"',
@@ -75,17 +76,17 @@ def create_ssl_context():
   return ssl_context
 
 ## ENDPOINTS
-async def index(request):
+async def index(request: 'web.Request'):
   with open(os.path.join(TELEOPDIR, "static", "index.html"), "r") as f:
     content = f.read()
     return web.Response(content_type="text/html", text=content)
 
 
-async def ping(request):
+async def ping(request: 'web.Request'):
   return web.Response(text="pong")
 
 
-async def sound(request):
+async def sound(request: 'web.Request'):
   params = await request.json()
   sound_to_play = params["sound"]
 
@@ -93,7 +94,7 @@ async def sound(request):
   return web.json_response({"status": "ok"})
 
 
-async def offer(request):
+async def offer(request: 'web.Request'):
   params = await request.json()
   body = StreamRequestBody(params["sdp"], ["driver"], ["testJoystick"], ["carState"])
   body_json = json.dumps(dataclasses.asdict(body))