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+python-versions = ">=3.9" +groups = ["main"] +files = [ + {file = "pyopenssl-26.3.0-py3-none-any.whl", hash = "sha256:46367f8f66b92271e6d218da9c87607e1ef5a0bc5c8dea5bb3db82f395c385a3"}, + {file = "pyopenssl-26.3.0.tar.gz", hash = "sha256:589de7fae1c9ea670d18422ed00fc04da787bbde8e1454aea872aa57b49ad341"}, +] + +[package.dependencies] +cryptography = ">=49.0.0,<50" +typing-extensions = {version = ">=4.9", markers = "python_version < \"3.13\""} + +[package.extras] +docs = ["sphinx (!=5.2.0,!=5.2.0.post0,!=7.2.5)", "sphinx_rtd_theme"] +test = ["pretend", "pytest (>=3.0.1)", "pytest-rerunfailures"] + [[package]] name = "pytango" version = "9.5.1" @@ -2418,4 +2843,4 @@ tango = ["pytango"] [metadata] lock-version = "2.1" python-versions = ">=3.10,<3.12" -content-hash = "909b19cee7a968181968a05123158b75e1d5e8a7227ee291e225e7bcf6a1df32" +content-hash = "db6325eb91113f435d26c8d9b8946e629dfce42a8192c09ca351a730e5199488" diff --git a/pyproject.toml b/pyproject.toml index 301a9fe..bd65862 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -37,6 +37,9 @@ redis = ">=4.3.5,<5.0.0" requests = "^2.33.1" typing-extensions = "^4.14.1" uvicorn = { version = "^0.34.0", extras = ["standard"] } +aiortc = "^1.14.0" +asyncio = "^4.0.0" +av = "^16" [tool.poetry.group.dev.dependencies] diff --git a/video_streamer/core/config.py b/video_streamer/core/config.py index d7331ae..e3e105c 100644 --- a/video_streamer/core/config.py +++ b/video_streamer/core/config.py @@ -1,6 +1,6 @@ import sys -from typing import Any, Dict, Optional, Union, Tuple +from typing import Any, Dict, List, Optional, Union, Tuple from pathlib import Path from pydantic import BaseModel, Field, validate_call, FilePath from pydantic_core import ValidationError @@ -94,6 +94,11 @@ class SourceConfiguration(BaseModel): title="Authentication Configurations", default=AuthenticationConfiguration(type=None), ) + allowed_origins: List[str] = Field( + title="Allowed Origins", + description="List of allowed origins for CORS", + default=[], + ) class ServerConfiguration(BaseModel): """Server Configuration""" diff --git a/video_streamer/core/streamer.py b/video_streamer/core/streamer.py index c07cf82..bf52279 100644 --- a/video_streamer/core/streamer.py +++ b/video_streamer/core/streamer.py @@ -3,6 +3,13 @@ import queue import time from typing import Tuple, Generator, Any, Union +from av import VideoFrame +from aiortc import MediaStreamTrack +import asyncio + +from fractions import Fraction + +import numpy as np from video_streamer.core.camera import TestCamera, LimaCamera, MJPEGCamera, VideoTestCamera, Camera, RedisCamera, EpicsPVACamera from video_streamer.core.config import SourceConfiguration @@ -16,7 +23,7 @@ def __init__(self, config: SourceConfiguration, host: str, port: int, debug: boo self._debug = debug self._expt = 0.05 - def start(self) -> Union[Generator, None, subprocess.Popen]: + def start(self) -> Union[Generator, None, subprocess.Popen, MediaStreamTrack]: pass def stop(self) -> None: @@ -194,3 +201,72 @@ def stop(self) -> None: self._poll_image_p.kill() else: print("Streamer stopped properly") + + +class VideoMediaStreamer(Streamer): + """ + A video track that returns frames from a multiprocessing queue. + """ + + kind = "video" + + def __init__(self, config, host, port, debug): + super().__init__(config, host, port, debug) + + self._poll_image_p = None + + def start(self) -> MediaStreamTrack: + camera = self.get_camera() + + _q = multiprocessing.Queue(1) + self._poll_image_p = multiprocessing.Process( + target=camera.poll_image, args=(_q,) + ) + self._poll_image_p.start() + + return QueueVideoTrack(_q, camera.size) + + def stop(self) -> None: + print("Stopping Streamer...") + if self._poll_image_p: + self._poll_image_p.terminate() + + time.sleep(1) + try: + if self._poll_image_p and self._poll_image_p.is_alive(): + raise Exception("Image poll process did not stop properly") + except Exception: + if self._poll_image_p: + self._poll_image_p.kill() + else: + print("Streamer stopped properly") + +class QueueVideoTrack(MediaStreamTrack): + kind = "video" + + def __init__(self, q: multiprocessing.Queue, image_size:Tuple , fps: int = 15, format_hint: str = "rgb24"): + super().__init__() + self.q = q + self.image_size = image_size + self.fps = fps + self.time_base = 1 / fps + self.format_hint = format_hint + self._ts = 0 + + async def recv(self) -> VideoFrame: + frame_bytes = bytearray() + try: + while True: + frame_bytes = self.q.get_nowait() + except Exception: + if len(frame_bytes) == 0: + frame_bytes = await asyncio.get_event_loop().run_in_executor(None, self.q.get) + + width, height = self.image_size + arr = np.frombuffer(frame_bytes, dtype=np.uint8).reshape((height, width, 3)) + + vf = VideoFrame.from_ndarray(arr, format=self.format_hint) + self._ts += 1 + vf.pts = self._ts + vf.time_base = Fraction(1, self.fps) + return vf \ No newline at end of file diff --git a/video_streamer/main.py b/video_streamer/main.py index e1f04b3..24fb703 100644 --- a/video_streamer/main.py +++ b/video_streamer/main.py @@ -71,7 +71,7 @@ def parse_args() -> argparse.Namespace: "-of", "--output-format", dest="output_format", - help="output format, MPEG1 or MJPEG", + help="output format, MPEG1, MJPEG or VP8", default="MPEG1", ) @@ -157,6 +157,15 @@ def parse_args() -> argparse.Namespace: default="", ) + opt_parser.add_argument( + "-ao", + "--allowed_origins", + nargs="+", + dest="allowed_origins", + help="Allowed origins for CORS", + default=[], + ) + return opt_parser.parse_args() @@ -189,7 +198,8 @@ def run() -> None: "type": args.auth_type, "username": args.username, "password": args.password - }) + }), + "allowed_origins": args.allowed_origins } } } @@ -202,7 +212,6 @@ def run() -> None: for uri, source_config in config.sources.items(): host, port = uri.split(":") - app = create_app(source_config, host, int(port), debug=args.debug) if app: diff --git a/video_streamer/server.py b/video_streamer/server.py index 6ed513d..1009e68 100644 --- a/video_streamer/server.py +++ b/video_streamer/server.py @@ -1,11 +1,12 @@ import os +import asyncio from fastapi import FastAPI, WebSocket, Request, WebSocketDisconnect from fastapi.responses import StreamingResponse, HTMLResponse from fastapi.staticfiles import StaticFiles from video_streamer.core.websockethandler import WebsocketHandler -from video_streamer.core.streamer import FFMPGStreamer, MJPEGStreamer +from video_streamer.core.streamer import FFMPGStreamer, MJPEGStreamer, VideoMediaStreamer from fastapi.templating import Jinja2Templates from contextlib import asynccontextmanager @@ -15,6 +16,10 @@ from typing import Optional from types import FrameType +from aiortc import RTCPeerConnection, RTCRtpSender, RTCSessionDescription +from fastapi.middleware.cors import CORSMiddleware +from fastapi.responses import JSONResponse + # This function makes sure that the server is correctly shutted down def handle_shutdown(signum: int, frame: Optional[FrameType]) -> None: print(f"Received signal {signum}, shutting down streamer...") @@ -116,5 +121,72 @@ async def video_in(request: Request): return app +def create_vp8_app(config, host, port, debug): + + video_capabilities = RTCRtpSender.getCapabilities("video") + + vp8_codecs = [ + codec for codec in video_capabilities.codecs + if codec.mimeType == "video/VP8" + ] + + @asynccontextmanager + async def lifespan(app: FastAPI): + app.state.streamer = VideoMediaStreamer(config, host, port, debug) + app.state.video_track = app.state.streamer.start() + + app.state.pcs = set() + + # Some signals are catched from uvicorn/fastapi, this makes sure that the server is correctly + # shutting down and the second part of the lifespan is called + signal.signal(signal.SIGTERM, handle_shutdown) + signal.signal(signal.SIGINT, handle_shutdown) + try: + yield + finally: + for pc in set(app.state.pcs): + try: + await asyncio.wait_for(pc.close(), timeout=2) + except asyncio.TimeoutError: + print("Timeout while closing peer connection, closing forcefully...") + app.state.pcs.clear() + app.state.streamer.stop() + + app = FastAPI(lifespan=lifespan) + app.add_middleware(CORSMiddleware, allow_methods=["OPTIONS", "POST"], allow_origins=config.allowed_origins, allow_headers=["Content-Type"]) + + @app.post("/offer") + async def offer(request: Request): + params = await request.json() + offer = RTCSessionDescription(sdp=params["sdp"], type=params["type"]) + pc = RTCPeerConnection() + request.app.state.pcs.add(pc) + + track = request.app.state.video_track + pc.addTrack(track) + + # set the preferred codec to VP8 + for transceiver in pc.getTransceivers(): + if transceiver.kind == "video": + transceiver.setCodecPreferences(vp8_codecs) + + @pc.on("connectionstatechange") + async def on_state_change(): + if pc.connectionState in ("failed", "closed", "disconnected"): + await pc.close() + request.app.state.pcs.discard(pc) + + await pc.setRemoteDescription(offer) + answer = await pc.createAnswer() + await pc.setLocalDescription(answer) + + return JSONResponse( + content={ + "sdp": pc.localDescription.sdp, + "type": pc.localDescription.type, + } + ) + + return app -available_applications = {"MPEG1": create_mpeg1_app, "MJPEG": create_mjpeg_app} +available_applications = {"MPEG1": create_mpeg1_app, "MJPEG": create_mjpeg_app, "VP8": create_vp8_app}