1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #pragma once
17 
18 #include <string>
19 
20 namespace android {
21 namespace media {
22 
23 /**
24  * Mode of head-tracking.
25  */
26 enum class HeadTrackingMode {
27     /** No head-tracking - screen-to-head pose is assumed to be identity. */
28     STATIC,
29     /** Head tracking enabled - world-to-screen pose is assumed to be identity. */
30     WORLD_RELATIVE,
31     /** Full screen-to-head tracking enabled. */
32     SCREEN_RELATIVE,
33 };
34 
35 std::string toString(HeadTrackingMode mode);
36 
37 }  // namespace media
38 }  // namespace android
39