98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
|
/*
|
||
|
|
* Copyright (C) 2014 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package android.view;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is the base class for frame statistics.
|
||
|
|
*/
|
||
|
|
public abstract class FrameStats {
|
||
|
|
/**
|
||
|
|
* Undefined time.
|
||
|
|
*/
|
||
|
|
public static final long UNDEFINED_TIME_NANO = -1;
|
||
|
|
|
||
|
|
/** @hide */
|
||
|
|
protected long mRefreshPeriodNano;
|
||
|
|
|
||
|
|
/** @hide */
|
||
|
|
protected long[] mFramesPresentedTimeNano;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the refresh period of the display hosting the window(s) for
|
||
|
|
* which these statistics apply.
|
||
|
|
*
|
||
|
|
* @return The refresh period in nanoseconds.
|
||
|
|
*/
|
||
|
|
public final long getRefreshPeriodNano() {
|
||
|
|
return mRefreshPeriodNano;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the number of frames for which there is data.
|
||
|
|
*
|
||
|
|
* @return The number of frames.
|
||
|
|
*/
|
||
|
|
public final int getFrameCount() {
|
||
|
|
return mFramesPresentedTimeNano != null
|
||
|
|
? mFramesPresentedTimeNano.length : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the start time of the interval for which these statistics
|
||
|
|
* apply. The start interval is the time when the first frame was
|
||
|
|
* presented.
|
||
|
|
*
|
||
|
|
* @return The start time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
|
||
|
|
* if there is no frame data.
|
||
|
|
*/
|
||
|
|
public final long getStartTimeNano() {
|
||
|
|
if (getFrameCount() <= 0) {
|
||
|
|
return UNDEFINED_TIME_NANO;
|
||
|
|
}
|
||
|
|
return mFramesPresentedTimeNano[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the end time of the interval for which these statistics
|
||
|
|
* apply. The end interval is the time when the last frame was
|
||
|
|
* presented.
|
||
|
|
*
|
||
|
|
* @return The end time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
|
||
|
|
* if there is no frame data.
|
||
|
|
*/
|
||
|
|
public final long getEndTimeNano() {
|
||
|
|
if (getFrameCount() <= 0) {
|
||
|
|
return UNDEFINED_TIME_NANO;
|
||
|
|
}
|
||
|
|
return mFramesPresentedTimeNano[mFramesPresentedTimeNano.length - 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the time a frame at a given index was presented.
|
||
|
|
*
|
||
|
|
* @param index The frame index.
|
||
|
|
* @return The presented time in nanoseconds or {@link #UNDEFINED_TIME_NANO}
|
||
|
|
* if the frame is not presented yet.
|
||
|
|
*/
|
||
|
|
public final long getFramePresentedTimeNano(int index) {
|
||
|
|
if (mFramesPresentedTimeNano == null) {
|
||
|
|
throw new IndexOutOfBoundsException();
|
||
|
|
}
|
||
|
|
return mFramesPresentedTimeNano[index];
|
||
|
|
}
|
||
|
|
}
|