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from abc import ABCMeta, abstractmethod
from pyglet import event
from pyglet.util import with_metaclass
class DeviceState:
ACTIVE = "active"
DISABLED = "disabled"
MISSING = "missing"
UNPLUGGED = "unplugged"
class DeviceFlow:
OUTPUT = "output"
INPUT = "input"
INPUT_OUTPUT = "input/output"
class AudioDevice:
"""Base class for a platform independent audio device.
_platform_state and _platform_flow is used to make device state numbers."""
_platform_state = {} # Must be defined by the parent.
_platform_flow = {} # Must be defined by the parent.
def __init__(self, dev_id, name, description, flow, state):
self.id = dev_id
self.flow = flow
self.state = state
self.name = name
self.description = description
def __repr__(self):
return "{}(name={}, state={}, flow={})".format(
self.__class__.__name__, self.name, self._platform_state[self.state], self._platform_flow[self.flow])
class AbstractAudioDeviceManager(with_metaclass(ABCMeta, event.EventDispatcher, object)):
def __del__(self):
"""Required to remove handlers before exit, as it can cause problems with the event system's weakrefs."""
self.remove_handlers(self)
@abstractmethod
def get_default_output(self):
"""Returns a default active output device or None if none available."""
pass
@abstractmethod
def get_default_input(self):
"""Returns a default active input device or None if none available."""
pass
@abstractmethod
def get_output_devices(self):
"""Returns a list of all active output devices."""
pass
@abstractmethod
def get_input_devices(self):
"""Returns a list of all active input devices."""
pass
@abstractmethod
def get_all_devices(self):
"""Returns a list of all audio devices, no matter what state they are in."""
pass
def on_device_state_changed(self, device, old_state, new_state):
"""Event, occurs when the state of a device changes, provides old state and new state."""
pass
def on_device_added(self, device):
"""Event, occurs when a new device is added to the system."""
pass
def on_device_removed(self, device):
"""Event, occurs when an existing device is removed from the system."""
pass
def on_default_changed(self, device):
"""Event, occurs when the default audio device changes."""
pass
AbstractAudioDeviceManager.register_event_type('on_device_state_changed')
AbstractAudioDeviceManager.register_event_type('on_device_added')
AbstractAudioDeviceManager.register_event_type('on_device_removed')
AbstractAudioDeviceManager.register_event_type('on_default_changed')
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