static PyObject *CmpObj_CaptureComponent(ComponentObject *_self, PyObject *_args)
{
PyObject *_res = NULL;
Component _rv;
Component capturingComponent;
#ifndef CaptureComponent
PyMac_PRECHECK(CaptureComponent);
#endif
if (!PyArg_ParseTuple(_args, "O&",
CmpObj_Convert, &capturingComponent))
return NULL;
_rv = CaptureComponent(_self->ob_itself,
capturingComponent);
_res = Py_BuildValue("O&",
CmpObj_New, _rv);
return _res;
}
VolumeCatcherImpl::VolumeCatcherImpl()
{
mVolume = 1.0; // default to full volume
mPan = 0.0; // and center pan
ComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
// Find the original default output component
mOriginalDefaultOutput = FindNextComponent(NULL, &desc);
// Register our own output component with the same parameters
mVolumeAdjuster = RegisterComponent(&desc, NewComponentRoutineUPP(volume_catcher_component_entry), 0, NULL, NULL, NULL);
// Capture the original component, so we always get found instead.
CaptureComponent(mOriginalDefaultOutput, mVolumeAdjuster);
}
