Move another helper into midi_mapper_util.h.

[nageru] / shared / midi_mapper_util.h

diff --git a/shared/midi_mapper_util.h b/shared/midi_mapper_util.h
index bc9b1bf164c83921a44c74b897eb52d7f2005e45..39ccd84e43f7d1ec1e707e2de730ea1d08ad59d9 100644 (file)
--- a/shared/midi_mapper_util.h
+++ b/shared/midi_mapper_util.h
@@ -46,4 +46,19 @@ inline bool match_bank_helper(const Proto &msg, int bank_field_number, int bank)
        return reflection->GetInt32(msg, bank_descriptor) == bank;
 }
 
+// Find what MIDI note the given light (as given by field_number) is mapped to, and enable it.
+template <class Proto>
+void activate_mapped_light(const Proto &msg, int field_number, std::set<unsigned> *active_lights)
+{
+       using namespace google::protobuf;
+       const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
+       const Reflection *reflection = msg.GetReflection();
+       if (!reflection->HasField(msg, descriptor)) {
+               return;
+       }
+       const MIDILightProto &light_proto =
+               static_cast<const MIDILightProto &>(reflection->GetMessage(msg, descriptor));
+       active_lights->insert(light_proto.note_number());
+}
+
 #endif  // !defined(_MIDI_MAPPER_UTIL_H)