2 * Copyright (C) 2015 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_EVENT_WORKER_H_
18 #define ANDROID_EVENT_WORKER_H_
20 #include "drmresources.h"
26 #include <hardware/hardware.h>
27 #include <hardware/hwcomposer.h>
33 virtual ~VsyncCallback() {
35 virtual void Callback(int display, int64_t timestamp) = 0;
38 class VSyncWorker : public Worker {
41 ~VSyncWorker() override;
43 int Init(DrmResources *drm, int display);
44 void RegisterCallback(std::shared_ptr<VsyncCallback> callback);
46 void VSyncControl(bool enabled);
49 void Routine() override;
52 int64_t GetPhasedVSync(int64_t frame_ns, int64_t current);
53 int SyntheticWaitVBlank(int64_t *timestamp);
57 // shared_ptr since we need to use this outside of the thread lock (to
58 // actually call the hook) and we don't want the memory freed until we're
60 std::shared_ptr<VsyncCallback> callback_ = NULL;
64 int64_t last_timestamp_;