mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
152 lines
5.1 KiB
Python
152 lines
5.1 KiB
Python
import asyncio
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import asyncio.subprocess
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from typing import List
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from typing import Dict
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from typing import Optional
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from .logging import get_logger
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from . import gpio
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# =====
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class Streamer: # pylint: disable=too-many-instance-attributes
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def __init__(
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self,
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cap_power: int,
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conv_power: int,
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sync_delay: float,
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init_delay: float,
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init_restart_after: float,
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quality: int,
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cmd: List[str],
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loop: asyncio.AbstractEventLoop,
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) -> None:
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self.__cap_power = (gpio.set_output(cap_power) if cap_power > 0 else cap_power)
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self.__conv_power = (gpio.set_output(conv_power) if conv_power > 0 else conv_power)
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self.__sync_delay = sync_delay
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self.__init_delay = init_delay
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self.__init_restart_after = init_restart_after
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self.__quality = quality
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self.__cmd = cmd
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self.__loop = loop
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self.__proc_task: Optional[asyncio.Task] = None
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async def start(self, quality: int, no_init_restart: bool=False) -> None:
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logger = get_logger()
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logger.info("Starting streamer ...")
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assert 1 <= quality <= 100
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self.__quality = quality
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await self.__inner_start()
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if self.__init_restart_after > 0.0 and not no_init_restart:
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logger.info("Stopping streamer to restart ...")
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await self.__inner_stop()
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logger.info("Starting again ...")
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await self.__inner_start()
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async def stop(self) -> None:
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get_logger().info("Stopping streamer ...")
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await self.__inner_stop()
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def is_running(self) -> bool:
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return bool(self.__proc_task)
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def get_current_quality(self) -> int:
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return self.__quality
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def get_state(self) -> Dict:
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return {
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"is_running": self.is_running(),
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"quality": self.__quality,
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}
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async def cleanup(self) -> None:
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if self.is_running():
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await self.stop()
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async def __inner_start(self) -> None:
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assert not self.__proc_task
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await self.__set_hw_enabled(True)
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self.__proc_task = self.__loop.create_task(self.__process())
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async def __inner_stop(self) -> None:
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assert self.__proc_task
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self.__proc_task.cancel()
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await asyncio.gather(self.__proc_task, return_exceptions=True)
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await self.__set_hw_enabled(False)
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self.__proc_task = None
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async def __set_hw_enabled(self, enabled: bool) -> None:
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# XXX: This sequence is very important to enable converter and cap board
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if self.__cap_power > 0:
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gpio.write(self.__cap_power, enabled)
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if self.__conv_power > 0:
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if enabled:
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await asyncio.sleep(self.__sync_delay)
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gpio.write(self.__conv_power, enabled)
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if enabled:
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await asyncio.sleep(self.__init_delay)
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async def __process(self) -> None: # pylint: disable=too-many-branches
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logger = get_logger(0)
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while True: # pylint: disable=too-many-nested-blocks
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proc: Optional[asyncio.subprocess.Process] = None # pylint: disable=no-member
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try:
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cmd = [part.format(quality=self.__quality) for part in self.__cmd]
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proc = await asyncio.create_subprocess_exec(
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*cmd,
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stdout=asyncio.subprocess.PIPE,
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stderr=asyncio.subprocess.STDOUT,
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)
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logger.info("Started streamer pid=%d: %s", proc.pid, cmd)
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empty = 0
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while proc.returncode is None:
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line = (await proc.stdout.readline()).decode(errors="ignore").strip()
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if line:
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logger.info("streamer: %s", line)
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empty = 0
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else:
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empty += 1
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if empty == 100: # asyncio bug
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break
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raise RuntimeError("WTF")
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except asyncio.CancelledError:
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break
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except Exception as err:
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if proc:
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logger.exception("Unexpected streamer error: pid=%d", proc.pid)
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else:
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logger.exception("Can't start streamer: %s", err)
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await asyncio.sleep(1)
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finally:
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if proc and proc.returncode is None:
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await self.__kill(proc)
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async def __kill(self, proc: asyncio.subprocess.Process) -> None: # pylint: disable=no-member
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try:
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proc.terminate()
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await asyncio.sleep(1)
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if proc.returncode is None:
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try:
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proc.kill()
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except Exception:
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if proc.returncode is not None:
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raise
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await proc.wait()
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get_logger().info("Streamer killed: pid=%d; retcode=%d", proc.pid, proc.returncode)
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except Exception:
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if proc.returncode is None:
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get_logger().exception("Can't kill streamer pid=%d", proc.pid)
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else:
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get_logger().info("Streamer killed: pid=%d; retcode=%d", proc.pid, proc.returncode)
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