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/*
* Copyright (C) 2018 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.
*/
#pragma once
#include "BufferLayer.h"
#include "Layer.h"
#include <renderengine/Image.h>
#include <renderengine/RenderEngine.h>
#include <system/window.h>
#include <utils/String8.h>
#include <stack>
namespace android {
class SlotGenerationTest;
class BufferStateLayer : public BufferLayer {
public:
explicit BufferStateLayer(const LayerCreationArgs&);
~BufferStateLayer() override;
// Implements Layer.
const char* getType() const override { return "BufferStateLayer"; }
void onLayerDisplayed(ftl::SharedFuture<FenceResult>) override;
void releasePendingBuffer(nsecs_t dequeueReadyTime) override;
void finalizeFrameEventHistory(const std::shared_ptr<FenceTime>& glDoneFence,
const CompositorTiming& compositorTiming) override;
bool isBufferDue(nsecs_t /*expectedPresentTime*/) const override { return true; }
Region getActiveTransparentRegion(const Layer::State& s) const override {
return s.transparentRegionHint;
}
Rect getCrop(const Layer::State& s) const;
bool setTransform(uint32_t transform) override;
bool setTransformToDisplayInverse(bool transformToDisplayInverse) override;
bool setCrop(const Rect& crop) override;
bool setBuffer(std::shared_ptr<renderengine::ExternalTexture>& /* buffer */,
const BufferData& bufferData, nsecs_t postTime, nsecs_t desiredPresentTime,
bool isAutoTimestamp, std::optional<nsecs_t> dequeueTime,
const FrameTimelineInfo& info) override;
bool setDataspace(ui::Dataspace dataspace) override;
bool setHdrMetadata(const HdrMetadata& hdrMetadata) override;
bool setSurfaceDamageRegion(const Region& surfaceDamage) override;
bool setApi(int32_t api) override;
bool setSidebandStream(const sp<NativeHandle>& sidebandStream) override;
bool setTransactionCompletedListeners(const std::vector<sp<CallbackHandle>>& handles) override;
bool setPosition(float /*x*/, float /*y*/) override;
bool setMatrix(const layer_state_t::matrix22_t& /*matrix*/);
// Override to ignore legacy layer state properties that are not used by BufferStateLayer
bool setSize(uint32_t /*w*/, uint32_t /*h*/) override { return false; }
bool setTransparentRegionHint(const Region& transparent) override;
Rect getBufferSize(const State& s) const override;
FloatRect computeSourceBounds(const FloatRect& parentBounds) const override;
void setAutoRefresh(bool autoRefresh) override;
bool setBufferCrop(const Rect& bufferCrop) override;
bool setDestinationFrame(const Rect& destinationFrame) override;
bool updateGeometry() override;
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
// Interface implementation for BufferLayer
// -----------------------------------------------------------------------
bool fenceHasSignaled() const override;
bool framePresentTimeIsCurrent(nsecs_t expectedPresentTime) const override;
bool onPreComposition(nsecs_t refreshStartTime) override;
uint32_t getEffectiveScalingMode() const override;
// See mPendingBufferTransactions
void decrementPendingBufferCount();
std::atomic<int32_t>* getPendingBufferCounter() override { return &mPendingBufferTransactions; }
std::string getPendingBufferCounterName() override { return mBlastTransactionName; }
bool shouldPresentNow(nsecs_t /*expectedPresentTime*/) const override { return true; }
protected:
void gatherBufferInfo() override;
void onSurfaceFrameCreated(const std::shared_ptr<frametimeline::SurfaceFrame>& surfaceFrame);
ui::Transform getInputTransform() const override;
Rect getInputBounds() const override;
private:
friend class SlotGenerationTest;
friend class TransactionFrameTracerTest;
friend class TransactionSurfaceFrameTest;
inline void tracePendingBufferCount(int32_t pendingBuffers);
bool updateFrameEventHistory(const sp<Fence>& acquireFence, nsecs_t postedTime,
nsecs_t requestedPresentTime);
bool latchSidebandStream(bool& recomputeVisibleRegions) override;
bool hasFrameUpdate() const override;
status_t updateTexImage(bool& recomputeVisibleRegions, nsecs_t latchTime,
nsecs_t expectedPresentTime) override;
status_t updateActiveBuffer() override;
status_t updateFrameNumber() override;
sp<Layer> createClone() override;
// Crop that applies to the buffer
Rect computeBufferCrop(const State& s);
bool willPresentCurrentTransaction() const;
bool bufferNeedsFiltering() const override;
bool simpleBufferUpdate(const layer_state_t& s) const override;
ReleaseCallbackId mPreviousReleaseCallbackId = ReleaseCallbackId::INVALID_ID;
uint64_t mPreviousReleasedFrameNumber = 0;
uint64_t mPreviousBarrierFrameNumber = 0;
bool mReleasePreviousBuffer = false;
// Stores the last set acquire fence signal time used to populate the callback handle's acquire
// time.
std::variant<nsecs_t, sp<Fence>> mCallbackHandleAcquireTimeOrFence = -1;
std::deque<std::shared_ptr<android::frametimeline::SurfaceFrame>> mPendingJankClassifications;
// An upper bound on the number of SurfaceFrames in the pending classifications deque.
static constexpr int kPendingClassificationMaxSurfaceFrames = 25;
const std::string mBlastTransactionName{"BufferTX - " + mName};
// This integer is incremented everytime a buffer arrives at the server for this layer,
// and decremented when a buffer is dropped or latched. When changed the integer is exported
// to systrace with ATRACE_INT and mBlastTransactionName. This way when debugging perf it is
// possible to see when a buffer arrived at the server, and in which frame it latched.
//
// You can understand the trace this way:
// - If the integer increases, a buffer arrived at the server.
// - If the integer decreases in latchBuffer, that buffer was latched
// - If the integer decreases in setBuffer or doTransaction, a buffer was dropped
std::atomic<int32_t> mPendingBufferTransactions{0};
// Contains requested position and matrix updates. This will be applied if the client does
// not specify a destination frame.
ui::Transform mRequestedTransform;
// TODO(marissaw): support sticky transform for LEGACY camera mode
class HwcSlotGenerator : public ClientCache::ErasedRecipient {
public:
HwcSlotGenerator() {
for (int i = 0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
mFreeHwcCacheSlots.push(i);
}
}
void bufferErased(const client_cache_t& clientCacheId);
int getHwcCacheSlot(const client_cache_t& clientCacheId);
private:
friend class SlotGenerationTest;
int addCachedBuffer(const client_cache_t& clientCacheId) REQUIRES(mMutex);
int getFreeHwcCacheSlot() REQUIRES(mMutex);
void evictLeastRecentlyUsed() REQUIRES(mMutex);
void eraseBufferLocked(const client_cache_t& clientCacheId) REQUIRES(mMutex);
struct CachedBufferHash {
std::size_t operator()(const client_cache_t& clientCacheId) const {
return std::hash<uint64_t>{}(clientCacheId.id);
}
};
std::mutex mMutex;
std::unordered_map<client_cache_t, std::pair<int /*HwcCacheSlot*/, uint64_t /*counter*/>,
CachedBufferHash>
mCachedBuffers GUARDED_BY(mMutex);
std::stack<int /*HwcCacheSlot*/> mFreeHwcCacheSlots GUARDED_BY(mMutex);
// The cache increments this counter value when a slot is updated or used.
// Used to track the least recently-used buffer
uint64_t mCounter = 0;
};
sp<HwcSlotGenerator> mHwcSlotGenerator;
};
} // namespace android
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