blob: a43fcdc6e202e02092703101ada0b7eb78d416af (
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
|
/*
* 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.
*/
#include "TimeLord.h"
#include <limits>
#include "FrameInfo.h"
namespace android {
namespace uirenderer {
namespace renderthread {
TimeLord::TimeLord()
: mFrameIntervalNanos(milliseconds_to_nanoseconds(16))
, mFrameTimeNanos(0)
, mFrameIntendedTimeNanos(0)
, mFrameVsyncId(UiFrameInfoBuilder::INVALID_VSYNC_ID)
, mFrameDeadline(std::numeric_limits<int64_t>::max()) {}
bool TimeLord::vsyncReceived(nsecs_t vsync, nsecs_t intendedVsync, int64_t vsyncId,
int64_t frameDeadline, nsecs_t frameInterval) {
if (intendedVsync > mFrameIntendedTimeNanos) {
mFrameIntendedTimeNanos = intendedVsync;
// The intendedVsync might have been advanced to account for scheduling
// jitter. Since we don't have a way to advance the vsync id we just
// reset it.
mFrameVsyncId = (vsyncId > mFrameVsyncId) ? vsyncId : UiFrameInfoBuilder::INVALID_VSYNC_ID;
mFrameDeadline = frameDeadline;
if (frameInterval > 0) {
mFrameIntervalNanos = frameInterval;
}
}
if (vsync > mFrameTimeNanos) {
mFrameTimeNanos = vsync;
return true;
}
return false;
}
nsecs_t TimeLord::computeFrameTimeNanos() {
// Logic copied from Choreographer.java
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
nsecs_t jitterNanos = now - mFrameTimeNanos;
if (jitterNanos >= mFrameIntervalNanos) {
nsecs_t lastFrameOffset = jitterNanos % mFrameIntervalNanos;
mFrameTimeNanos = now - lastFrameOffset;
// mFrameVsyncId is not adjusted here as we still want to send
// the vsync id that started this frame to the Surface Composer
}
return mFrameTimeNanos;
}
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
|
