X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=shared%2Fmidi_mapper_util.h;h=c9c96bb9516dbd31cf81699b144d19449a0b84eb;hb=66c4fc7370e321fa5725e56685e5c5bb84bd6990;hp=39ccd84e43f7d1ec1e707e2de730ea1d08ad59d9;hpb=c7627f3f46ca3ec755e301dde2fca2f6e244f64d;p=nageru

diff --git a/shared/midi_mapper_util.h b/shared/midi_mapper_util.h
index 39ccd84..c9c96bb 100644
--- a/shared/midi_mapper_util.h
+++ b/shared/midi_mapper_util.h
@@ -2,35 +2,48 @@
 #define _MIDI_MAPPER_UTIL_H 1
 
 #include "midi_mapping.pb.h"
+#include "shared/midi_device.h"
 
 #include <google/protobuf/descriptor.h>
 
 template <class Proto>
-inline bool match_controller_helper(const Proto &msg, int field_number, int controller)
+inline int get_controller_mapping_helper(const Proto &msg, int field_number, int default_value)
 {
 	using namespace google::protobuf;
 	const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
 	const Reflection *reflection = msg.GetReflection();
 	if (!reflection->HasField(msg, descriptor)) {
-		return false;
+		return default_value;
 	}
 	const MIDIControllerProto &controller_proto =
 		static_cast<const MIDIControllerProto &>(reflection->GetMessage(msg, descriptor));
-	return (controller_proto.controller_number() == controller);
+	return controller_proto.controller_number();
 }
 
 template <class Proto>
-inline bool match_button_helper(const Proto &msg, int field_number, int note)
+inline bool match_controller_helper(const Proto &msg, int field_number, int controller)
+{
+	return (get_controller_mapping_helper(msg, field_number, -1) == controller);
+}
+
+template <class Proto>
+inline int get_button_mapping_helper(const Proto &msg, int field_number, int default_value)
 {
 	using namespace google::protobuf;
 	const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
 	const Reflection *reflection = msg.GetReflection();
 	if (!reflection->HasField(msg, descriptor)) {
-		return false;
+		return default_value;
 	}
 	const MIDIButtonProto &button_proto =
 		static_cast<const MIDIButtonProto &>(reflection->GetMessage(msg, descriptor));
-	return (button_proto.note_number() == note);
+	return button_proto.note_number();
+}
+
+template <class Proto>
+inline bool match_button_helper(const Proto &msg, int field_number, int note)
+{
+	return (get_button_mapping_helper(msg, field_number, -1) == note);
 }
 
 template <class Proto>
@@ -46,19 +59,55 @@ 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)
+inline MIDILightProto get_light_mapping_helper(const Proto &msg, int field_number)
 {
 	using namespace google::protobuf;
 	const FieldDescriptor *descriptor = msg.GetDescriptor()->FindFieldByNumber(field_number);
 	const Reflection *reflection = msg.GetReflection();
 	if (!reflection->HasField(msg, descriptor)) {
+		return MIDILightProto();
+	}
+	return static_cast<const MIDILightProto &>(reflection->GetMessage(msg, descriptor));
+}
+
+// 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::map<MIDIDevice::LightKey, uint8_t> *active_lights)
+{
+	MIDILightProto light_proto = get_light_mapping_helper(msg, field_number);
+	if (!light_proto.has_note_number()) {
 		return;
 	}
-	const MIDILightProto &light_proto =
-		static_cast<const MIDILightProto &>(reflection->GetMessage(msg, descriptor));
-	active_lights->insert(light_proto.note_number());
+	active_lights->emplace(MIDIDevice::LightKey{MIDIDevice::LightKey::NOTE, unsigned(light_proto.note_number())},
+		light_proto.velocity());
+}
+
+inline double map_controller_to_float(int controller, int val)
+{
+	if (controller == MIDIReceiver::PITCH_BEND_CONTROLLER) {
+		// We supposedly go from -8192 to 8191 (inclusive), but there are
+		// controllers that only have 10-bit precision and do the upconversion
+		// to 14-bit wrong (just padding with zeros), making 8176 the highest
+		// attainable value. We solve this by making the effective range
+		// -8176..8176 (inclusive).
+		if (val <= -8176) {
+			return 0.0;
+		} else if (val >= 8176) {
+			return 1.0;
+		} else {
+			return 0.5 * (double(val) / 8176.0) + 0.5;
+		}
+	}
+
+	// Slightly hackish mapping so that we can represent exactly 0.0, 0.5 and 1.0.
+	if (val <= 0) {
+		return 0.0;
+	} else if (val >= 127) {
+		return 1.0;
+	} else {
+		return (val + 0.5) / 127.0;
+	}
 }
 
 #endif  // !defined(_MIDI_MAPPER_UTIL_H)