syntax = "proto2"; package android.automotive.computepipe.example; message BoundingBox { optional int32 top_x = 1; optional int32 top_y = 2; optional int32 width = 3; optional int32 height = 4; }; message Pose { optional float pan = 1; optional float tilt = 2; } message FaceOutput { optional BoundingBox box = 1; optional Pose pose = 2; };