return -1;
}
+ event.mEventType = kAudioUnitEvent_BeginParameterChangeGesture;
+ event.mArgument.mParameter.mAudioUnit = unit->AU();
+ event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
+ event.mArgument.mParameter.mScope = descriptors[param_id].scope;
+ event.mArgument.mParameter.mElement = descriptors[param_id].element;
+
+ if (AUEventListenerAddEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
+ return -1;
+ }
+
+ event.mEventType = kAudioUnitEvent_EndParameterChangeGesture;
+ event.mArgument.mParameter.mAudioUnit = unit->AU();
+ event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
+ event.mArgument.mParameter.mScope = descriptors[param_id].scope;
+ event.mArgument.mParameter.mElement = descriptors[param_id].element;
+
+ if (AUEventListenerAddEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
+ return -1;
+ }
+
return 0;
}
return -1;
}
+ event.mEventType = kAudioUnitEvent_BeginParameterChangeGesture;
+ event.mArgument.mParameter.mAudioUnit = unit->AU();
+ event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
+ event.mArgument.mParameter.mScope = descriptors[param_id].scope;
+ event.mArgument.mParameter.mElement = descriptors[param_id].element;
+
+ if (AUEventListenerRemoveEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
+ return -1;
+ }
+
+ event.mEventType = kAudioUnitEvent_EndParameterChangeGesture;
+ event.mArgument.mParameter.mAudioUnit = unit->AU();
+ event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
+ event.mArgument.mParameter.mScope = descriptors[param_id].scope;
+ event.mArgument.mParameter.mElement = descriptors[param_id].element;
+
+ if (AUEventListenerRemoveEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
+ return -1;
+ }
+
return 0;
}
void
AUPlugin::parameter_change_listener (void* /*arg*/, void* /*src*/, const AudioUnitEvent* event, UInt64 /*host_time*/, Float32 new_value)
{
- ParameterMap::iterator i = parameter_map.find (event->mArgument.mParameter.mParameterID);
-
- if (i != parameter_map.end()) {
- ParameterChanged (i->second, new_value);
- }
+ ParameterMap::iterator i;
+
+ if ((i = parameter_map.find (event->mArgument.mParameter.mParameterID)) == parameter_map.end()) {
+ return;
+ }
+
+ switch (event->mEventType) {
+ case kAudioUnitEvent_BeginParameterChangeGesture:
+ StartTouch (i->second);
+ break;
+ case kAudioUnitEvent_EndParameterChangeGesture:
+ EndTouch (i->second);
+ break;
+ case kAudioUnitEvent_ParameterValueChange:
+ ParameterChanged (i->second, new_value);
+ break;
+ default:
+ break;
+ }
}