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/*
* Copyright (C) 2015 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 <gui/DisplayEventReceiver.h>
#include <utils/Log.h>
#include <utils/Looper.h>
namespace android {
using FrameRateOverride = DisplayEventReceiver::Event::FrameRateOverride;
struct VsyncEventData {
// The Vsync Id corresponsing to this vsync event. This will be used to
// populate ISurfaceComposer::setFrameTimelineVsync and
// SurfaceComposerClient::setFrameTimelineVsync
int64_t id = FrameTimelineInfo::INVALID_VSYNC_ID;
// The deadline in CLOCK_MONOTONIC that the app needs to complete its
// frame by (both on the CPU and the GPU)
int64_t deadlineTimestamp = std::numeric_limits<int64_t>::max();
// The current frame interval in ns when this frame was scheduled.
int64_t frameInterval = 0;
};
class DisplayEventDispatcher : public LooperCallback {
public:
explicit DisplayEventDispatcher(
const sp<Looper>& looper,
ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp,
ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
status_t initialize();
void dispose();
status_t scheduleVsync();
void injectEvent(const DisplayEventReceiver::Event& event);
int getFd() const;
virtual int handleEvent(int receiveFd, int events, void* data);
protected:
virtual ~DisplayEventDispatcher() = default;
private:
sp<Looper> mLooper;
DisplayEventReceiver mReceiver;
bool mWaitingForVsync;
std::vector<FrameRateOverride> mFrameRateOverrides;
virtual void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count,
VsyncEventData vsyncEventData) = 0;
virtual void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId,
bool connected) = 0;
virtual void dispatchModeChanged(nsecs_t timestamp, PhysicalDisplayId displayId, int32_t modeId,
nsecs_t vsyncPeriod) = 0;
// AChoreographer-specific hook for processing null-events so that looper
// can be properly poked.
virtual void dispatchNullEvent(nsecs_t timestamp, PhysicalDisplayId displayId) = 0;
virtual void dispatchFrameRateOverrides(nsecs_t timestamp, PhysicalDisplayId displayId,
std::vector<FrameRateOverride> overrides) = 0;
bool processPendingEvents(nsecs_t* outTimestamp, PhysicalDisplayId* outDisplayId,
uint32_t* outCount, VsyncEventData* outVsyncEventData);
};
} // namespace android
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