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-rw-r--r--mpv.py147
1 files changed, 91 insertions, 56 deletions
diff --git a/mpv.py b/mpv.py
index aded4a9..a2950ce 100644
--- a/mpv.py
+++ b/mpv.py
@@ -23,6 +23,7 @@ import os
import sys
from warnings import warn
from functools import partial, wraps
+from contextlib import contextmanager
import collections
import re
import traceback
@@ -636,37 +637,6 @@ def _event_generator(handle):
yield event
-def _event_loop(event_handle, event_callbacks, message_handlers, property_handlers, log_handler):
- for event in _event_generator(event_handle):
- try:
- devent = event.as_dict(decoder=lazy_decoder) # copy data from ctypes
- eid = devent['event_id']
- for callback in event_callbacks:
- callback(devent)
-
- if eid == MpvEventID.PROPERTY_CHANGE:
- pc = devent['event']
- name, value, _fmt = pc['name'], pc['value'], pc['format']
- for handler in property_handlers[name]:
- handler(name, value)
-
- if eid == MpvEventID.LOG_MESSAGE and log_handler is not None:
- ev = devent['event']
- log_handler(ev['level'], ev['prefix'], ev['text'])
-
- if eid == MpvEventID.CLIENT_MESSAGE:
- # {'event': {'args': ['key-binding', 'foo', 'u-', 'g']}, 'reply_userdata': 0, 'error': 0, 'event_id': 16}
- target, *args = devent['event']['args']
- if target in message_handlers:
- message_handlers[target](*args)
-
- if eid == MpvEventID.SHUTDOWN:
- _mpv_detach_destroy(event_handle)
- return
-
- except Exception as e:
- traceback.print_exc()
-
_py_to_mpv = lambda name: name.replace('_', '-')
_mpv_to_py = lambda name: name.replace('-', '_')
@@ -857,13 +827,13 @@ class MPV(object):
self.lazy = _DecoderPropertyProxy(self, lazy_decoder)
self._event_callbacks = []
+ self._event_handler_lock = threading.Lock()
self._property_handlers = collections.defaultdict(lambda: [])
self._quit_handlers = set()
self._message_handlers = {}
self._key_binding_handlers = {}
self._event_handle = _mpv_create_client(self.handle, b'py_event_handler')
- self._loop = partial(_event_loop, self._event_handle, self._event_callbacks,
- self._message_handlers, self._property_handlers, log_handler)
+ self._log_handler = log_handler
self._stream_protocol_cbs = {}
self._stream_protocol_frontends = collections.defaultdict(lambda: {})
self.register_stream_protocol('python', self._python_stream_open)
@@ -881,36 +851,68 @@ class MPV(object):
self._event_thread = None
self._core_shutdown = False
- # This is the first callback in line, so other event callback-based mechanisms can use core_shutdown
- @self.event_callback('shutdown')
- def shutdown_event_callback(event):
- nonlocal self
- self._core_shutdown = True
+
+ def _loop(self):
+ for event in _event_generator(self._event_handle):
+ try:
+ devent = event.as_dict(decoder=lazy_decoder) # copy data from ctypes
+ eid = devent['event_id']
+
+ with self._event_handler_lock:
+ if eid == MpvEventID.SHUTDOWN:
+ self._core_shutdown = True
+
+ for callback in self._event_callbacks:
+ callback(devent)
+
+ if eid == MpvEventID.PROPERTY_CHANGE:
+ pc = devent['event']
+ name, value, _fmt = pc['name'], pc['value'], pc['format']
+ for handler in self._property_handlers[name]:
+ handler(name, value)
+
+ if eid == MpvEventID.LOG_MESSAGE and self._log_handler is not None:
+ ev = devent['event']
+ self._log_handler(ev['level'], ev['prefix'], ev['text'])
+
+ if eid == MpvEventID.CLIENT_MESSAGE:
+ # {'event': {'args': ['key-binding', 'foo', 'u-', 'g']}, 'reply_userdata': 0, 'error': 0, 'event_id': 16}
+ target, *args = devent['event']['args']
+ if target in self._message_handlers:
+ self._message_handlers[target](*args)
+
+ if eid == MpvEventID.SHUTDOWN:
+ _mpv_detach_destroy(self._event_handle)
+ return
+
+ except Exception as e:
+ print('Exception inside python-mpv event loop:', file=sys.stderr)
+ traceback.print_exc()
@property
def core_shutdown(self):
return self._core_shutdown
def wait_until_paused(self):
- """Waits until playback of the current title is paused or done."""
+ """Waits until playback of the current title is paused or done. Raises a ShutdownError if the core is shutdown while
+ waiting."""
self.wait_for_property('core-idle')
def wait_for_playback(self):
- """Waits until playback of the current title is paused or done.
-
- NOTE: This function changed from an event-based implementation to a property observer-based implementation in
- v0.5.0. This may cause different results in certain cases. If you find one such case, for documentation please
- tell the world in an issue on the github project."""
- self.wait_until_playing()
- self.wait_until_paused()
+ """Waits until playback of the current title is finished. Raises a ShutdownError if the core is shutdown while
+ waiting.
+ """
+ self.wait_for_event('end_file')
def wait_until_playing(self):
- """Waits until playback of the current title has started."""
+ """Waits until playback of the current title has started. Raises a ShutdownError if the core is shutdown while
+ waiting."""
self.wait_for_property('core-idle', lambda idle: not idle)
def wait_for_property(self, name, cond=lambda val: val, level_sensitive=True):
"""Waits until ``cond`` evaluates to a truthy value on the named property. This can be used to wait for
- properties such as ``idle_active`` indicating the player is done with regular playback and just idling around
+ properties such as ``idle_active`` indicating the player is done with regular playback and just idling around.
+ Raises a ShutdownError when the core is shutdown while waiting.
"""
sema = threading.Semaphore(value=0)
@@ -929,8 +931,38 @@ class MPV(object):
if self._core_shutdown:
raise ShutdownError('libmpv core has been shutdown')
+ shutdown_handler.unregister_mpv_events()
self.unobserve_property(name, observer)
+ def wait_for_event(self, *event_types, cond=lambda evt: True):
+ with self.prepare_and_wait_for_event(*event_types, cond=cond):
+ pass
+
+ @contextmanager
+ def prepare_and_wait_for_event(self, *event_types, cond=lambda evt: True):
+ """Waits for the indicated event(s). If cond is given, waits until cond(event) is true. Raises a ShutdownError
+ if the core is shutdown while waiting. This also happens when 'shutdown' is in event_types.
+ """
+ sema = threading.Semaphore(value=0)
+
+ @self.event_callback('shutdown')
+ def shutdown_handler(event):
+ sema.release()
+
+ @self.event_callback(*event_types)
+ def target_handler(evt):
+ if cond(evt):
+ sema.release()
+
+ yield
+ sema.acquire()
+
+ if self._core_shutdown:
+ raise ShutdownError('libmpv core has been shutdown')
+
+ shutdown_handler.unregister_mpv_events()
+ target_handler.unregister_mpv_events()
+
def __del__(self):
if self.handle:
self.terminate()
@@ -1369,14 +1401,17 @@ class MPV(object):
my_handler.unregister_mpv_events()
"""
def register(callback):
- types = [MpvEventID.from_str(t) if isinstance(t, str) else t for t in event_types] or MpvEventID.ANY
- @wraps(callback)
- def wrapper(event, *args, **kwargs):
- if event['event_id'] in types:
- callback(event, *args, **kwargs)
- self._event_callbacks.append(wrapper)
- wrapper.unregister_mpv_events = partial(self.unregister_event_callback, wrapper)
- return wrapper
+ with self._event_handler_lock:
+ if self._core_shutdown:
+ raise ShutdownError('libmpv core has been shutdown')
+ types = [MpvEventID.from_str(t) if isinstance(t, str) else t for t in event_types] or MpvEventID.ANY
+ @wraps(callback)
+ def wrapper(event, *args, **kwargs):
+ if event['event_id'] in types:
+ callback(event, *args, **kwargs)
+ self._event_callbacks.append(wrapper)
+ wrapper.unregister_mpv_events = partial(self.unregister_event_callback, wrapper)
+ return wrapper
return register
@staticmethod