1 /*
2  * Copyright (C) 2014 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 
17 #ifndef ANDROID_UI_FRAME_STATS_H
18 #define ANDROID_UI_FRAME_STATS_H
19 
20 #include <utils/Flattenable.h>
21 #include <utils/Timers.h>
22 #include <utils/Vector.h>
23 
24 namespace android {
25 
26 class FrameStats : public LightFlattenable<FrameStats> {
27 public:
FrameStats()28     FrameStats() : refreshPeriodNano(0) {};
29 
30     /*
31      * Approximate refresh time, in nanoseconds.
32      */
33     nsecs_t refreshPeriodNano;
34 
35    /*
36     * The times in nanoseconds for when the frame contents were posted by the producer (e.g.
37     * the application). They are either explicitly set or defaulted to the time when
38     * Surface::queueBuffer() was called.
39     */
40     Vector<nsecs_t> desiredPresentTimesNano;
41 
42    /*
43     * The times in milliseconds for when the frame contents were presented on the screen.
44     */
45     Vector<nsecs_t> actualPresentTimesNano;
46 
47    /*
48     * The times in nanoseconds for when the frame contents were ready to be presented. Note that
49     * a frame can be posted and still it contents being rendered asynchronously in GL. In such a
50     * case these are the times when the frame contents were completely rendered (i.e. their fences
51     * signaled).
52     */
53     Vector<nsecs_t> frameReadyTimesNano;
54 
55     // LightFlattenable
56     bool isFixedSize() const;
57     size_t getFlattenedSize() const;
58     status_t flatten(void* buffer, size_t size) const;
59     status_t unflatten(void const* buffer, size_t size);
60 };
61 
62 }; // namespace android
63 
64 #endif // ANDROID_UI_FRAME_STATS_H
65