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from pyglet.libs.win32 import com
from pyglet.libs.win32 import _ole32 as ole32
from pyglet.libs.win32.constants import CLSCTX_INPROC_SERVER
from pyglet.libs.win32.types import *
from pyglet.media.devices import base
from pyglet.util import debug_print
_debug = debug_print('debug_media')
EDataFlow = UINT
# Audio rendering stream. Audio data flows from the application to the audio endpoint device, which renders the stream.
eRender = 0
# Audio capture stream. Audio data flows from the audio endpoint device that captures the stream, to the application.
eCapture = 1
# Audio rendering or capture stream. Audio data can flow either from the application to the audio endpoint device,
# or from the audio endpoint device to the application.
eAll = 2
EDataFlow_enum_count = 3
ERole = UINT
eConsole = 0 # Games, system notification sounds, and voice commands.
eMultimedia = 1 # Music, movies, narration, and live music recording.
eCommunications = 2 # Voice communications (talking to another person).
ERole_enum_count = 3
DEVICE_STATE_ACTIVE = 0x00000001
DEVICE_STATE_DISABLED = 0x00000002
DEVICE_STATE_NOTPRESENT = 0x00000004
DEVICE_STATE_UNPLUGGED = 0x00000008
DEVICE_STATEMASK_ALL = 0x0000000F
STGM_READ = 0
STGM_WRITE = 1
STGM_READWRITE = 2
VT_LPWSTR = 0x001F
class PROPERTYKEY(ctypes.Structure):
_fields_ = [
('fmtid', com.GUID),
('pid', DWORD),
]
def __repr__(self):
return "PROPERTYKEY({}, pid={})".format(self.fmtid, self.pid)
REFPROPERTYKEY = PROPERTYKEY
PKEY_Device_FriendlyName = PROPERTYKEY(
com.GUID(0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0), 14)
PKEY_Device_DeviceDesc = PROPERTYKEY(
com.GUID(0xa45c254e, 0xdf1c, 0x4efd, 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0), 2)
PKEY_DeviceInterface_FriendlyName = PROPERTYKEY(
com.GUID(0x026e516e, 0xb814, 0x414b, 0x83, 0xcd, 0x85, 0x6d, 0x6f, 0xef, 0x48, 0x22), 2)
class IPropertyStore(com.pIUnknown):
_methods_ = [
('GetCount',
com.STDMETHOD(POINTER(DWORD))),
('GetAt',
com.STDMETHOD(DWORD, POINTER(PROPERTYKEY))),
('GetValue',
com.STDMETHOD(REFPROPERTYKEY, POINTER(PROPVARIANT))),
('SetValue',
com.STDMETHOD()),
('Commit',
com.STDMETHOD()),
]
CLSID_MMDeviceEnumerator = com.GUID(0xbcde0395, 0xe52f, 0x467c, 0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e)
IID_IMMDeviceEnumerator = com.GUID(0xa95664d2, 0x9614, 0x4f35, 0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6)
class IMMNotificationClient(com.IUnknown):
_methods_ = [
('OnDeviceStateChanged',
com.METHOD(ctypes.c_void_p, ctypes.c_void_p, LPCWSTR, DWORD)),
('OnDeviceAdded',
com.METHOD(ctypes.c_void_p, ctypes.c_void_p, LPCWSTR)),
('OnDeviceRemoved',
com.METHOD(ctypes.c_void_p, ctypes.c_void_p, LPCWSTR)),
('OnDefaultDeviceChanged',
com.METHOD(ctypes.c_void_p, ctypes.c_void_p, EDataFlow, ERole, LPCWSTR)),
('OnPropertyValueChanged',
com.METHOD(ctypes.c_void_p, ctypes.c_void_p, LPCWSTR, PROPERTYKEY)),
]
class AudioNotificationCB(com.COMObject):
_interfaces_ = [IMMNotificationClient]
def __init__(self, audio_devices):
super().__init__()
self.audio_devices = audio_devices
self._lost = False
def OnDeviceStateChanged(self, this, pwstrDeviceId, dwNewState):
device = self.audio_devices.get_cached_device(pwstrDeviceId)
old_state = device.state
assert _debug(
"Audio device {} changed state. From state: {} to state: {}".format(device.name, old_state, dwNewState))
device.state = dwNewState
self.audio_devices.dispatch_event('on_device_state_changed', device, old_state, dwNewState)
def OnDeviceAdded(self, this, pwstrDeviceId):
assert _debug("Audio device was added {}".format(pwstrDeviceId))
self.audio_devices.dispatch_event('on_device_added', pwstrDeviceId)
def OnDeviceRemoved(self, this, pwstrDeviceId):
assert _debug("Audio device was removed {}".format(pwstrDeviceId))
self.audio_devices.dispatch_event('on_device_removed', pwstrDeviceId)
def OnDefaultDeviceChanged(self, this, flow, role, pwstrDeviceId):
# Only support eConsole role right now
if role == 0:
if pwstrDeviceId is None:
device = None
else:
device = self.audio_devices.get_cached_device(pwstrDeviceId)
self.audio_devices.dispatch_event('on_default_changed', device)
def OnPropertyValueChanged(self, this, pwstrDeviceId, key):
pass
class IMMDevice(com.pIUnknown):
_methods_ = [
('Activate',
com.STDMETHOD(com.REFIID, DWORD, POINTER(PROPVARIANT))),
('OpenPropertyStore',
com.STDMETHOD(UINT, POINTER(IPropertyStore))),
('GetId',
com.STDMETHOD(POINTER(LPWSTR))),
('GetState',
com.STDMETHOD(POINTER(DWORD))),
]
class IMMDeviceCollection(com.pIUnknown):
_methods_ = [
('GetCount',
com.STDMETHOD(POINTER(UINT))),
('Item',
com.STDMETHOD(UINT, POINTER(IMMDevice))),
]
class IMMDeviceEnumerator(com.pIUnknown):
_methods_ = [
('EnumAudioEndpoints',
com.STDMETHOD(EDataFlow, DWORD, c_void_p)),
('GetDefaultAudioEndpoint',
com.STDMETHOD(EDataFlow, ERole, ctypes.POINTER(IMMDevice))),
('GetDevice',
com.STDMETHOD(LPCWSTR, POINTER(IMMDevice))),
('RegisterEndpointNotificationCallback',
com.STDMETHOD(POINTER(IMMNotificationClient))),
('UnregisterEndpointNotificationCallback',
com.STDMETHOD()),
]
class Win32AudioDevice(base.AudioDevice):
_platform_state = {
DEVICE_STATE_ACTIVE: base.DeviceState.ACTIVE,
DEVICE_STATE_DISABLED: base.DeviceState.DISABLED,
DEVICE_STATE_NOTPRESENT: base.DeviceState.MISSING,
DEVICE_STATE_UNPLUGGED: base.DeviceState.UNPLUGGED
}
_platform_flow = {
eRender: base.DeviceFlow.OUTPUT,
eCapture: base.DeviceFlow.INPUT,
eAll: base.DeviceFlow.INPUT_OUTPUT
}
class Win32AudioDeviceManager(base.AbstractAudioDeviceManager):
def __init__(self):
self._device_enum = IMMDeviceEnumerator()
ole32.CoCreateInstance(CLSID_MMDeviceEnumerator, None, CLSCTX_INPROC_SERVER, IID_IMMDeviceEnumerator,
byref(self._device_enum))
# Keep all devices cached, and the callback can keep them updated.
self.devices = self._query_all_devices()
super().__init__()
self._callback = AudioNotificationCB(self)
self._device_enum.RegisterEndpointNotificationCallback(self._callback)
def get_default_output(self):
"""Attempts to retrieve a default audio output for the system. Returns None if no available devices found."""
try:
device = IMMDevice()
self._device_enum.GetDefaultAudioEndpoint(eRender, eConsole, byref(device))
dev_id, name, desc, dev_state = self.get_device_info(device)
device.Release()
pid = self.get_cached_device(dev_id)
pid.state = dev_state
return pid
except OSError:
assert _debug("No default audio output was found.")
return None
def get_default_input(self):
"""Attempts to retrieve a default audio input for the system. Returns None if no available devices found."""
try:
device = IMMDevice()
self._device_enum.GetDefaultAudioEndpoint(eCapture, eConsole, byref(device))
dev_id, name, desc, dev_state = self.get_device_info(device)
device.Release()
pid = self.get_cached_device(dev_id)
pid.state = dev_state
return pid
except OSError:
assert _debug("No default input output was found.")
return None
def get_cached_device(self, dev_id):
"""Gets the cached devices, so we can reduce calls to COM and tell current state vs new states."""
for device in self.devices:
if device.id == dev_id:
return device
raise Exception("Attempted to get a device that does not exist.")
# return None
def get_output_devices(self, state=DEVICE_STATE_ACTIVE):
return [device for device in self.devices if device.state == state and device.flow == eRender]
def get_input_devices(self, state=DEVICE_STATE_ACTIVE):
return [device for device in self.devices if device.state == state and device.flow == eCapture]
def get_all_devices(self):
return self.devices
def _query_all_devices(self):
return self.get_devices(flow=eRender, state=DEVICE_STATEMASK_ALL) + self.get_devices(flow=eCapture,
state=DEVICE_STATEMASK_ALL)
def get_device_info(self, device):
"""Return the ID, Name, and Description of the Audio Device."""
store = IPropertyStore()
device.OpenPropertyStore(STGM_READ, byref(store))
dev_id = LPWSTR()
device.GetId(byref(dev_id))
name = self.get_pkey_value(store, PKEY_Device_FriendlyName)
description = self.get_pkey_value(store, PKEY_Device_DeviceDesc)
state = DWORD()
device.GetState(byref(state))
store.Release()
return dev_id.value, name, description, state.value
def get_devices(self, flow=eRender, state=DEVICE_STATE_ACTIVE):
"""Get's all of the specified devices (by default, all output and active)."""
collection = IMMDeviceCollection()
self._device_enum.EnumAudioEndpoints(flow, state, byref(collection))
count = UINT()
collection.GetCount(byref(count))
devices = []
for i in range(count.value):
dev_itf = IMMDevice()
collection.Item(i, byref(dev_itf))
dev_id, name, desc, dev_state = self.get_device_info(dev_itf)
device = Win32AudioDevice(dev_id, name, desc, flow, dev_state)
dev_itf.Release()
devices.append(device)
collection.Release()
return devices
@staticmethod
def get_pkey_value(store, pkey):
try:
propvar = PROPVARIANT()
store.GetValue(pkey, byref(propvar))
value = propvar.pwszVal
ole32.PropVariantClear(propvar)
except Exception as err:
value = "Unknown"
return value
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