-namespace {
-
-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;
- }
-}
-
-} // namespace
-