1 /*
2 * Copyright 2021 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 #undef LOG_TAG
18 #define LOG_TAG "FpsReporter"
19 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
20
21 #include <algorithm>
22
23 #include "FpsReporter.h"
24 #include "Layer.h"
25 #include "SurfaceFlinger.h"
26
27 namespace android {
28
FpsReporter(frametimeline::FrameTimeline & frameTimeline,SurfaceFlinger & flinger,std::unique_ptr<Clock> clock)29 FpsReporter::FpsReporter(frametimeline::FrameTimeline& frameTimeline, SurfaceFlinger& flinger,
30 std::unique_ptr<Clock> clock)
31 : mFrameTimeline(frameTimeline), mFlinger(flinger), mClock(std::move(clock)) {
32 LOG_ALWAYS_FATAL_IF(mClock == nullptr, "Passed in null clock when constructing FpsReporter!");
33 }
34
dispatchLayerFps()35 void FpsReporter::dispatchLayerFps() {
36 const auto now = mClock->now();
37 if (now - mLastDispatch < kMinDispatchDuration) {
38 return;
39 }
40
41 std::vector<TrackedListener> localListeners;
42 {
43 std::scoped_lock lock(mMutex);
44 if (mListeners.empty()) {
45 return;
46 }
47
48 std::transform(mListeners.begin(), mListeners.end(), std::back_inserter(localListeners),
49 [](const std::pair<wp<IBinder>, TrackedListener>& entry) {
50 return entry.second;
51 });
52 }
53
54 std::unordered_set<int32_t> seenTasks;
55 std::vector<std::pair<TrackedListener, sp<Layer>>> listenersAndLayersToReport;
56
57 mFlinger.mCurrentState.traverse([&](Layer* layer) {
58 auto& currentState = layer->getDrawingState();
59 if (currentState.metadata.has(METADATA_TASK_ID)) {
60 int32_t taskId = currentState.metadata.getInt32(METADATA_TASK_ID, 0);
61 if (seenTasks.count(taskId) == 0) {
62 // localListeners is expected to be tiny
63 for (TrackedListener& listener : localListeners) {
64 if (listener.taskId == taskId) {
65 seenTasks.insert(taskId);
66 listenersAndLayersToReport.push_back({listener, sp<Layer>(layer)});
67 break;
68 }
69 }
70 }
71 }
72 });
73
74 for (const auto& [listener, layer] : listenersAndLayersToReport) {
75 std::unordered_set<int32_t> layerIds;
76
77 layer->traverse(LayerVector::StateSet::Current,
78 [&](Layer* layer) { layerIds.insert(layer->getSequence()); });
79
80 listener.listener->onFpsReported(mFrameTimeline.computeFps(layerIds));
81 }
82
83 mLastDispatch = now;
84 }
85
binderDied(const wp<IBinder> & who)86 void FpsReporter::binderDied(const wp<IBinder>& who) {
87 std::scoped_lock lock(mMutex);
88 mListeners.erase(who);
89 }
90
addListener(const sp<gui::IFpsListener> & listener,int32_t taskId)91 void FpsReporter::addListener(const sp<gui::IFpsListener>& listener, int32_t taskId) {
92 sp<IBinder> asBinder = IInterface::asBinder(listener);
93 asBinder->linkToDeath(this);
94 std::lock_guard lock(mMutex);
95 mListeners.emplace(wp<IBinder>(asBinder), TrackedListener{listener, taskId});
96 }
97
removeListener(const sp<gui::IFpsListener> & listener)98 void FpsReporter::removeListener(const sp<gui::IFpsListener>& listener) {
99 std::lock_guard lock(mMutex);
100 mListeners.erase(wp<IBinder>(IInterface::asBinder(listener)));
101 }
102
103 } // namespace android
104