blob: 3fbe6fe8a4e5b83ab4bc915786b1bd2516d9946a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* 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];
}
}
|
