def FillTree(self):
root = self.AddRoot("Sound Card")
mixercaps = MIXERCAPS()
mixerline = MIXERLINE()
self.mixerHandle = mixerHandle = HMIXER()
# Obtain the hmixer struct
rc = mixerOpen(byref(mixerHandle), self.deviceId, 0, 0, 0)
if rc != MMSYSERR_NOERROR:
raise SoundMixerException()
if mixerGetDevCaps(mixerHandle, byref(mixercaps), sizeof(MIXERCAPS)):
raise SoundMixerException()
for i in range(mixercaps.cDestinations):
mixerline.cbStruct = sizeof(MIXERLINE)
mixerline.dwDestination = i
if mixerGetLineInfo(mixerHandle, byref(mixerline),
MIXER_GETLINEINFOF_DESTINATION):
continue
destItem = self.AppendItem(
root, mixerline.szName + ": %i" % mixerline.cChannels)
self.AddControls(destItem, mixerline)
for n in range(mixerline.cConnections):
mixerline.cbStruct = sizeof(MIXERLINE)
mixerline.dwDestination = i
mixerline.dwSource = n
if mixerGetLineInfo(mixerHandle, byref(mixerline),
MIXER_GETLINEINFOF_SOURCE):
continue
sourceItem = self.AppendItem(
destItem, mixerline.szName + ": %i" % mixerline.cChannels)
self.AddControls(sourceItem, mixerline)
def GetMixer(self, deviceId):
hmixer = HMIXER()
rc = mixerOpen(byref(hmixer), deviceId, 0, 0, 0)
if rc != MMSYSERR_NOERROR:
raise SoundMixerException()
return hmixer