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/*
* Copyright 2016 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.
*/
#ifndef ANDROID_SURFACEREPLAYER_BUFFERQUEUESCHEDULER_H
#define ANDROID_SURFACEREPLAYER_BUFFERQUEUESCHEDULER_H
#include "Color.h"
#include "Event.h"
#include <gui/SurfaceControl.h>
#include <utils/StrongPointer.h>
#include <atomic>
#include <condition_variable>
#include <mutex>
#include <queue>
#include <utility>
namespace android {
auto constexpr LAYER_ALPHA = 190;
struct Dimensions {
Dimensions() = default;
Dimensions(int w, int h) : width(w), height(h) {}
int width = 0;
int height = 0;
};
struct BufferEvent {
BufferEvent() = default;
BufferEvent(std::shared_ptr<Event> e, Dimensions d) : event(e), dimensions(d) {}
std::shared_ptr<Event> event;
Dimensions dimensions;
};
class BufferQueueScheduler {
public:
BufferQueueScheduler(const sp<SurfaceControl>& surfaceControl, const HSV& color, int id);
void startScheduling();
void addEvent(const BufferEvent&);
void stopScheduling();
void setSurfaceControl(const sp<SurfaceControl>& surfaceControl, const HSV& color);
private:
void bufferUpdate(const Dimensions& dimensions);
// Lock and fill the surface, block until the event is signaled by the main loop,
// then unlock and post the buffer.
void fillSurface(const std::shared_ptr<Event>& event);
sp<SurfaceControl> mSurfaceControl;
HSV mColor;
const int mSurfaceId;
bool mContinueScheduling;
std::queue<BufferEvent> mBufferEvents;
std::mutex mMutex;
std::condition_variable mCondition;
};
} // namespace android
#endif
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