syntax = "proto2"; package com.google.tuningfork; enum Level { LEVEL_INVALID = 0; LEVEL_1 = 1; LEVEL_2 = 2; LEVEL_3 = 3; }; message Annotation { optional Level level = 1; optional Level level2 = 2; } enum LOD { LOD_INVALID = 0; LOD_1 = 1; LOD_2 = 2; LOD_3 = 3; LOD_4 = 4; }; message FidelityParams { optional LOD lod = 1; }