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      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:
     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