642 lines
18 KiB
Python
642 lines
18 KiB
Python
from dataclasses import asdict
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import os
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import re
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import select
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import subprocess
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import threading
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import time
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from typing import Any, Collection, Dict, List, Optional
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from platypush.context import get_bus
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from platypush.message.response import Response
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from platypush.plugins.media import PlayerState, MediaPlugin
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from platypush.message.event.media import (
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MediaPlayEvent,
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MediaPlayRequestEvent,
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MediaPauseEvent,
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MediaStopEvent,
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NewPlayingMediaEvent,
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)
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from platypush.plugins import action
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from platypush.utils import find_bins_in_path
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class MediaMplayerPlugin(MediaPlugin):
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"""
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Plugin to control MPlayer instances.
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"""
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_mplayer_default_communicate_timeout = 0.5
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_mplayer_bin_default_args = [
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'-slave',
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'-quiet',
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'-idle',
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'-input',
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'nodefault-bindings',
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'-noconfig',
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'all',
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]
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def __init__(
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self,
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mplayer_bin: Optional[str] = None,
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mplayer_timeout: float = _mplayer_default_communicate_timeout,
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args: Optional[Collection[str]] = None,
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**kwargs,
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):
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"""
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Create the MPlayer wrapper. Note that the plugin methods are populated
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dynamically by introspecting the mplayer executable. You can verify the
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supported methods at runtime by using the `list_actions` method.
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:param mplayer_bin: Path to the MPlayer executable (default: search for
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the first occurrence in your system PATH environment variable)
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:param mplayer_timeout: Timeout in seconds to wait for more data
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from MPlayer before considering a response ready (default: 0.5 seconds)
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:param args: Default arguments that will be passed to the MPlayer
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executable
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"""
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super().__init__(**kwargs)
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self.args = args or []
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self._init_mplayer_bin(mplayer_bin=mplayer_bin)
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self._build_actions()
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self._player = None
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self._mplayer_timeout = mplayer_timeout
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self._mplayer_stopped_event = threading.Event()
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self._status_lock = threading.Lock()
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def _init_mplayer_bin(self, mplayer_bin=None):
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if not mplayer_bin:
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bin_name = 'mplayer.exe' if os.name == 'nt' else 'mplayer'
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bins = find_bins_in_path(bin_name)
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if not bins:
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raise RuntimeError(
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'MPlayer executable not specified and not '
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+ 'found in your PATH. Make sure that mplayer'
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+ 'is either installed or configured'
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)
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self.mplayer_bin = bins[0]
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else:
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mplayer_bin = os.path.expanduser(mplayer_bin)
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if not (
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os.path.isfile(mplayer_bin)
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and (os.name == 'nt' or os.access(mplayer_bin, os.X_OK))
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):
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raise RuntimeError(
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f'{mplayer_bin} is does not exist or is not a valid executable file'
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)
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self.mplayer_bin = mplayer_bin
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def _init_mplayer(self, mplayer_args=None):
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if self._player:
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try:
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self._player.terminate()
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except Exception as e:
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self.logger.debug('Failed to quit mplayer before _exec: %s', e)
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m_args = mplayer_args or []
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args = [self.mplayer_bin] + self._mplayer_bin_default_args
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for arg in (*self.args, *m_args):
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if arg not in args:
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args.append(arg)
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popen_args: Dict[str, Any] = {
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'stdin': subprocess.PIPE,
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'stdout': subprocess.PIPE,
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}
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if self._env:
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popen_args['env'] = self._env
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self._player = subprocess.Popen(args, **popen_args)
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threading.Thread(target=self._process_monitor()).start()
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def _build_actions(self):
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"""Populates the actions list by introspecting the mplayer executable"""
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self._actions = {}
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mplayer = subprocess.Popen(
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[self.mplayer_bin, '-input', 'cmdlist'],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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)
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def args_pprint(txt):
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lc = txt.lower()
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if lc[0] == '[':
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return f'{lc[1:-1]}=None'
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return lc
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while True:
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if not mplayer.stdout:
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break
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line = mplayer.stdout.readline()
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if not line:
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break
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line = line.decode()
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if line[0].isupper():
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continue
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args = line.split()
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cmd_name = args.pop(0)
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arguments = ', '.join([args_pprint(a) for a in args])
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self._actions[cmd_name] = f'{cmd_name}({arguments})'
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def _exec(
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self, cmd, *args, mplayer_args=None, prefix=None, wait_for_response=False
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):
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cmd_name = cmd
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response = None
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if cmd_name in {'loadfile', 'loadlist'}:
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self._init_mplayer(mplayer_args)
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else:
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if not self._player:
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self.logger.warning('MPlayer is not running')
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cmd = (
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f'{prefix + " " if prefix else ""}'
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+ cmd_name
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+ (" " if args else "")
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+ " ".join(repr(a) for a in args)
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+ '\n'
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).encode()
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if not self._player:
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self.logger.warning('Cannot send command %s: player unavailable', cmd)
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return
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if not self._player.stdin:
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self.logger.warning(
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'Could not communicate with the mplayer process: the stdin is closed'
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)
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return
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self._player.stdin.write(cmd)
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self._player.stdin.flush()
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if cmd_name in {'loadfile', 'loadlist'}:
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self._post_event(NewPlayingMediaEvent, resource=args[0])
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elif cmd_name == 'pause':
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self._post_event(MediaPauseEvent)
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elif cmd_name == 'quit':
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self._player.terminate()
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self._player.wait()
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try:
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self._player.kill()
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except Exception:
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pass
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self._player = None
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if not wait_for_response:
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return
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if not (self._player and self._player.stdout):
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self.logger.warning(
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'Could not communicate with the mplayer process: the stdout is closed'
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)
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return
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poll = select.poll()
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poll.register(self._player.stdout, select.POLLIN)
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last_read_time = time.time()
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while time.time() - last_read_time < self._mplayer_timeout:
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result = poll.poll(0)
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if result:
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if not self._player:
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break
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buf = self._player.stdout.readline()
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line = buf.decode() if isinstance(buf, bytes) else buf
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last_read_time = time.time()
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if line.startswith('ANS_'):
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m = re.match('^([^=]+)=(.*)$', line[4:])
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if not m:
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self.logger.warning('Unexpected response: %s', line)
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break
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k, v = m.group(1), m.group(2)
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v = v.strip()
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if v == 'yes':
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v = True
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elif v == 'no':
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v = False
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try:
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if isinstance(v, str):
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v = eval(v) # pylint: disable=eval-used
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except Exception:
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pass
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response = {k: v}
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return response
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@action
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def execute(self, cmd, args=None):
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"""
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Execute a raw MPlayer command. See
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https://www.mplayerhq.hu/DOCS/tech/slave.txt for a reference or call
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:meth:`.list_actions` to get a list
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"""
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args = args or []
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return self._exec(cmd, *args)
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@action
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def list_actions(self):
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return [
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{'action': a, 'args': self._actions[a]}
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for a in sorted(self._actions.keys())
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]
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def _process_monitor(self):
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def _thread():
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if not self._player:
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return
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self._mplayer_stopped_event.clear()
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self._player.wait()
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try:
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self.quit()
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except Exception:
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pass
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self._post_event(MediaStopEvent)
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self._mplayer_stopped_event.set()
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self._player = None
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return _thread
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@staticmethod
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def _post_event(evt_type, **evt):
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bus = get_bus()
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bus.post(evt_type(player='local', plugin='media.mplayer', **evt))
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@action
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def play(
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self,
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resource: str,
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subtitles: Optional[str] = None,
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mplayer_args: Optional[List[str]] = None,
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):
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"""
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Play a resource.
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:param resource: Resource to play - can be a local file or a remote URL
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:param subtitles: Path to optional subtitle file
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:param mplayer_args: Extra runtime arguments that will be passed to the
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MPlayer executable
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"""
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self._post_event(MediaPlayRequestEvent, resource=resource)
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if subtitles:
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subs = self.get_subtitles_file(subtitles)
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if subs:
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mplayer_args = list(mplayer_args or []) + ['-sub', subs]
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resource = self._get_resource(resource)
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if resource.startswith('file://'):
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resource = resource[7:]
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self._exec('loadfile', resource, mplayer_args=mplayer_args)
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self._post_event(MediaPlayEvent, resource=resource)
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if self.volume:
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self.set_volume(volume=self.volume)
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return self.status()
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@action
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def pause(self, *_, **__):
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"""Toggle the paused state"""
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self._exec('pause')
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self._post_event(MediaPauseEvent)
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return self.status()
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@action
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def stop(self, *_, **__):
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"""Stop the playback"""
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# return self._exec('stop')
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self.quit()
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return self.status()
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@action
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def quit(self, *_, **__):
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"""Quit the player"""
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self._exec('quit')
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self._post_event(MediaStopEvent)
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return self.status()
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@action
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def voldown(self, *_, step=5.0, **__):
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"""Volume down by (default: 10)%"""
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self._exec('volume', -step * 10)
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return self.status()
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@action
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def volup(self, *_, step=5.0, **__):
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"""Volume up by (default: 10)%"""
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self._exec('volume', step * 10)
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return self.status()
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@action
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def back(self, *_, offset=30.0, **__):
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"""Back by (default: 30) seconds"""
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self.step_property('time_pos', -offset)
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return self.status()
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@action
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def forward(self, *_, offset=30.0, **__):
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"""Forward by (default: 30) seconds"""
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self.step_property('time_pos', offset)
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return self.status()
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@action
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def toggle_subtitles(self, *_, **__):
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"""Toggle the subtitles visibility"""
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response: dict = (
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self.get_property('sub_visibility').output or {} # type: ignore
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)
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subs = response.get('sub_visibility')
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self._exec('sub_visibility', int(not subs))
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return self.status()
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@action
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def add_subtitles(self, filename: str, **__):
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"""
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Sets media subtitles from filename
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:param filename: Subtitles file.
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"""
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self._exec('sub_visibility', 1)
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self._exec('sub_load', filename)
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return self.status()
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@action
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def remove_subtitles(self, *_, index: Optional[int] = None, **__):
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"""
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Removes the subtitle specified by the index (default: all)
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:param index: (1-based) index of the subtitles track to remove.
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"""
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if index is None:
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self._exec('sub_remove')
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else:
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self._exec('sub_remove', index)
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return self.status()
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@action
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def is_playing(self, *_, **__):
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"""
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:returns: True if it's playing, False otherwise
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"""
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response: dict = self.get_property('pause').output or {} # type: ignore
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return response.get('pause') is False
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@action
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def load(self, resource, *_, mplayer_args: Optional[Collection[str]] = None, **__):
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"""
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Load a resource/video in the player.
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"""
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if mplayer_args is None:
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mplayer_args = {}
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return self.play(resource, mplayer_args=mplayer_args)
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@action
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def mute(self, *_, **__):
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"""Toggle mute state"""
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self._exec('mute')
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return self.status()
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@action
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def seek(self, position: float, *_, **__):
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"""
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Seek backward/forward by the specified number of seconds
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:param position: Number of seconds relative to the current cursor
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:type position: int
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"""
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self.step_property('time_pos', position)
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return self.status()
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@action
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def set_position(self, position: float, *_, **__):
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"""
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Seek backward/forward to the specified absolute position
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:param position: Number of seconds from the start
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:type position: int
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"""
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self.set_property('time_pos', position)
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return self.status()
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@action
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def set_volume(self, volume: float, *_, **__):
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"""
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Set the volume
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:param volume: Volume value between 0 and 100
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:type volume: float
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"""
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self._exec('volume', volume)
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return self.status()
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@action
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def status(self):
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"""
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Get the current player state.
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:returns: A dictionary containing the current state.
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Example::
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output = {
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"state": "play" # or "stop" or "pause"
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}
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"""
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if not self._player:
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return {'state': PlayerState.STOP.value}
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status = {}
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props = {
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'duration': 'length',
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'filename': 'filename',
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'fullscreen': 'fullscreen',
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'mute': 'mute',
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'name': 'filename',
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'path': 'path',
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'pause': 'pause',
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'percent_pos': 'percent_pos',
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'position': 'time_pos',
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'title': 'filename',
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'volume': 'volume',
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}
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with self._status_lock:
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for prop, player_prop in props.items():
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value = self.get_property(player_prop).output
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if isinstance(value, dict):
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status[prop] = value.get(player_prop)
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status['seekable'] = bool(status['duration'])
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status['state'] = (
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PlayerState.PAUSE.value if status['pause'] else PlayerState.PLAY.value
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)
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if status['path']:
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status['url'] = (
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'file://' if os.path.isfile(status['path']) else ''
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) + status['path']
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status['volume_max'] = 100
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if self._latest_resource:
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status.update(
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{
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k: v
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for k, v in asdict(self._latest_resource).items()
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if v is not None
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}
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)
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return status
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@action
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def get_property(
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self,
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property: str, # pylint: disable=redefined-builtin
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args: Optional[Collection[str]] = None,
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):
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"""
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Get a player property (e.g. pause, fullscreen etc.). See
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https://www.mplayerhq.hu/DOCS/tech/slave.txt for a full list of the
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available properties
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"""
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args = args or []
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response = Response(output={})
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result = (
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self._exec(
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'get_property',
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property,
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prefix='pausing_keep_force',
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wait_for_response=True,
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*args,
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)
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or {}
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)
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for k, v in result.items():
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if k == 'ERROR' and v not in response.errors:
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if not isinstance(response.errors, list):
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response.errors = []
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response.errors.append(f'{property}{args}: {v}')
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else:
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if not isinstance(response.output, dict):
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response.output = {}
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response.output[k] = v
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return response
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@action
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def set_property(
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self,
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property: str, # pylint: disable=redefined-builtin
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value: Any,
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args: Optional[Collection[str]] = None,
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):
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"""
|
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Set a player property (e.g. pause, fullscreen etc.). See
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https://www.mplayerhq.hu/DOCS/tech/slave.txt for a full list of the
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available properties
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"""
|
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args = args or []
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response = Response(output={})
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result = (
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self._exec(
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'set_property',
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property,
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value,
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prefix='pausing_keep_force' if property != 'pause' else None,
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wait_for_response=True,
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*args,
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)
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or {}
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)
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for k, v in result.items():
|
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if k == 'ERROR' and v not in response.errors:
|
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if not isinstance(response.errors, list):
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response.errors = []
|
|
response.errors.append(f'{property} {value}{args}: {v}')
|
|
else:
|
|
if not isinstance(response.output, dict):
|
|
response.output = {}
|
|
response.output[k] = v
|
|
|
|
return response
|
|
|
|
@action
|
|
def step_property(
|
|
self,
|
|
property: str, # pylint: disable=redefined-builtin
|
|
value: Any,
|
|
*_,
|
|
args: Optional[Collection[str]] = None,
|
|
**__,
|
|
):
|
|
"""
|
|
Step a player property (e.g. volume, time_pos etc.). See
|
|
https://www.mplayerhq.hu/DOCS/tech/slave.txt for a full list of the
|
|
available steppable properties
|
|
"""
|
|
|
|
args = args or []
|
|
response = Response(output={})
|
|
|
|
result = (
|
|
self._exec(
|
|
'step_property',
|
|
property,
|
|
value,
|
|
prefix='pausing_keep_force',
|
|
wait_for_response=True,
|
|
*args,
|
|
)
|
|
or {}
|
|
)
|
|
|
|
for k, v in result.items():
|
|
if k == 'ERROR' and v not in response.errors:
|
|
if not isinstance(response.errors, list):
|
|
response.errors = []
|
|
response.errors.append(f'{property} {value}{args}: {v}')
|
|
else:
|
|
if not isinstance(response.output, dict):
|
|
response.output = {}
|
|
response.output[k] = v
|
|
|
|
return response
|
|
|
|
def set_subtitles(self, filename: str, *_, **__):
|
|
self.logger.debug('set_subtitles called with filename=%s', filename)
|
|
raise NotImplementedError
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|