| /* |
| * Copyright (C) 2010 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_BUFFERLAYERCONSUMER_H |
| #define ANDROID_BUFFERLAYERCONSUMER_H |
| |
| #include <android-base/thread_annotations.h> |
| #include <gui/BufferQueueDefs.h> |
| #include <gui/ConsumerBase.h> |
| #include <gui/HdrMetadata.h> |
| |
| #include <ui/FenceTime.h> |
| #include <ui/GraphicBuffer.h> |
| #include <ui/GraphicTypes.h> |
| #include <ui/Region.h> |
| |
| #include <utils/String8.h> |
| #include <utils/Vector.h> |
| #include <utils/threads.h> |
| |
| namespace android { |
| // ---------------------------------------------------------------------------- |
| |
| class DispSync; |
| class Layer; |
| class String8; |
| |
| namespace renderengine { |
| class RenderEngine; |
| class Image; |
| } // namespace renderengine |
| |
| /* |
| * BufferLayerConsumer consumes buffers of graphics data from a BufferQueue, |
| * and makes them available to RenderEngine as a texture. |
| * |
| * A typical usage pattern is to call updateTexImage() when a new frame is |
| * desired. If a new frame is available, the frame is latched. If not, the |
| * previous contents are retained. The texture is attached and updated after |
| * bindTextureImage() is called. |
| * |
| * All calls to updateTexImage must be made with RenderEngine being current. |
| * The texture is attached to the TEXTURE_EXTERNAL texture target. |
| */ |
| class BufferLayerConsumer : public ConsumerBase { |
| public: |
| static const status_t BUFFER_REJECTED = UNKNOWN_ERROR + 8; |
| |
| class BufferRejecter { |
| friend class BufferLayerConsumer; |
| virtual bool reject(const sp<GraphicBuffer>& buf, const BufferItem& item) = 0; |
| |
| protected: |
| virtual ~BufferRejecter() {} |
| }; |
| |
| struct ContentsChangedListener : public FrameAvailableListener { |
| virtual void onSidebandStreamChanged() = 0; |
| }; |
| |
| // BufferLayerConsumer constructs a new BufferLayerConsumer object. The |
| // tex parameter indicates the name of the RenderEngine texture to which |
| // images are to be streamed. |
| BufferLayerConsumer(const sp<IGraphicBufferConsumer>& bq, renderengine::RenderEngine& engine, |
| uint32_t tex, Layer* layer); |
| |
| // Sets the contents changed listener. This should be used instead of |
| // ConsumerBase::setFrameAvailableListener(). |
| void setContentsChangedListener(const wp<ContentsChangedListener>& listener); |
| |
| // updateTexImage acquires the most recently queued buffer, and sets the |
| // image contents of the target texture to it. |
| // |
| // This call may only be made while RenderEngine is current. |
| // |
| // This calls doFenceWait to ensure proper synchronization unless native |
| // fence is supported. |
| // |
| // Unlike the GLConsumer version, this version takes a functor that may be |
| // used to reject the newly acquired buffer. It also does not bind the |
| // RenderEngine texture until bindTextureImage is called. |
| status_t updateTexImage(BufferRejecter* rejecter, nsecs_t expectedPresentTime, |
| bool* autoRefresh, bool* queuedBuffer, uint64_t maxFrameNumber); |
| |
| // See BufferLayerConsumer::bindTextureImageLocked(). |
| status_t bindTextureImage(); |
| |
| // setReleaseFence stores a fence that will signal when the current buffer |
| // is no longer being read. This fence will be returned to the producer |
| // when the current buffer is released by updateTexImage(). Multiple |
| // fences can be set for a given buffer; they will be merged into a single |
| // union fence. |
| void setReleaseFence(const sp<Fence>& fence); |
| |
| bool releasePendingBuffer(); |
| |
| sp<Fence> getPrevFinalReleaseFence() const; |
| |
| // See GLConsumer::getTransformMatrix. |
| void getTransformMatrix(float mtx[16]); |
| |
| // getTimestamp retrieves the timestamp associated with the texture image |
| // set by the most recent call to updateTexImage. |
| // |
| // The timestamp is in nanoseconds, and is monotonically increasing. Its |
| // other semantics (zero point, etc) are source-dependent and should be |
| // documented by the source. |
| int64_t getTimestamp(); |
| |
| // getDataSpace retrieves the DataSpace associated with the texture image |
| // set by the most recent call to updateTexImage. |
| ui::Dataspace getCurrentDataSpace(); |
| |
| // getCurrentHdrMetadata retrieves the HDR metadata associated with the |
| // texture image set by the most recent call to updateTexImage. |
| const HdrMetadata& getCurrentHdrMetadata() const; |
| |
| // getFrameNumber retrieves the frame number associated with the texture |
| // image set by the most recent call to updateTexImage. |
| // |
| // The frame number is an incrementing counter set to 0 at the creation of |
| // the BufferQueue associated with this consumer. |
| uint64_t getFrameNumber(); |
| |
| bool getTransformToDisplayInverse() const; |
| |
| // must be called from SF main thread |
| const Region& getSurfaceDamage() const; |
| |
| // Merge the given damage region into the current damage region value. |
| void mergeSurfaceDamage(const Region& damage); |
| |
| // getCurrentApi retrieves the API which queues the current buffer. |
| int getCurrentApi() const; |
| |
| // See GLConsumer::setDefaultBufferSize. |
| status_t setDefaultBufferSize(uint32_t width, uint32_t height); |
| |
| // setFilteringEnabled sets whether the transform matrix should be computed |
| // for use with bilinear filtering. |
| void setFilteringEnabled(bool enabled); |
| |
| // getCurrentBuffer returns the buffer associated with the current image. |
| // When outSlot is not nullptr, the current buffer slot index is also |
| // returned. Simiarly, when outFence is not nullptr, the current output |
| // fence is returned. |
| sp<GraphicBuffer> getCurrentBuffer(int* outSlot = nullptr, sp<Fence>* outFence = nullptr) const; |
| |
| // getCurrentCrop returns the cropping rectangle of the current buffer. |
| Rect getCurrentCrop() const; |
| |
| // getCurrentTransform returns the transform of the current buffer. |
| uint32_t getCurrentTransform() const; |
| |
| // getCurrentScalingMode returns the scaling mode of the current buffer. |
| uint32_t getCurrentScalingMode() const; |
| |
| // getCurrentFence returns the fence indicating when the current buffer is |
| // ready to be read from. |
| sp<Fence> getCurrentFence() const; |
| |
| // getCurrentFence returns the FenceTime indicating when the current |
| // buffer is ready to be read from. |
| std::shared_ptr<FenceTime> getCurrentFenceTime() const; |
| |
| // setConsumerUsageBits overrides the ConsumerBase method to OR |
| // DEFAULT_USAGE_FLAGS to usage. |
| status_t setConsumerUsageBits(uint64_t usage); |
| void onBufferAvailable(const BufferItem& item) EXCLUDES(mImagesMutex); |
| |
| protected: |
| // abandonLocked overrides the ConsumerBase method to clear |
| // mCurrentTextureImage in addition to the ConsumerBase behavior. |
| virtual void abandonLocked() EXCLUDES(mImagesMutex); |
| |
| // dumpLocked overrides the ConsumerBase method to dump BufferLayerConsumer- |
| // specific info in addition to the ConsumerBase behavior. |
| virtual void dumpLocked(String8& result, const char* prefix) const; |
| |
| // See ConsumerBase::acquireBufferLocked |
| virtual status_t acquireBufferLocked(BufferItem* item, nsecs_t presentWhen, |
| uint64_t maxFrameNumber = 0) override |
| EXCLUDES(mImagesMutex); |
| |
| bool canUseImageCrop(const Rect& crop) const; |
| |
| struct PendingRelease { |
| PendingRelease() : isPending(false), currentTexture(-1), graphicBuffer() {} |
| |
| bool isPending; |
| int currentTexture; |
| sp<GraphicBuffer> graphicBuffer; |
| }; |
| |
| // This releases the buffer in the slot referenced by mCurrentTexture, |
| // then updates state to refer to the BufferItem, which must be a |
| // newly-acquired buffer. If pendingRelease is not null, the parameters |
| // which would have been passed to releaseBufferLocked upon the successful |
| // completion of the method will instead be returned to the caller, so that |
| // it may call releaseBufferLocked itself later. |
| status_t updateAndReleaseLocked(const BufferItem& item, |
| PendingRelease* pendingRelease = nullptr) |
| EXCLUDES(mImagesMutex); |
| |
| // Binds mTexName and the current buffer to TEXTURE_EXTERNAL target. |
| // If the bind succeeds, this calls doFenceWait. |
| status_t bindTextureImageLocked(); |
| |
| private: |
| // Utility class for managing GraphicBuffer references into renderengine |
| class Image { |
| public: |
| Image(const sp<GraphicBuffer>& graphicBuffer, renderengine::RenderEngine& engine); |
| virtual ~Image(); |
| const sp<GraphicBuffer>& graphicBuffer() { return mGraphicBuffer; } |
| |
| private: |
| // mGraphicBuffer is the buffer that was used to create this image. |
| sp<GraphicBuffer> mGraphicBuffer; |
| // Back-reference into renderengine to initiate cleanup. |
| renderengine::RenderEngine& mRE; |
| DISALLOW_COPY_AND_ASSIGN(Image); |
| }; |
| |
| // freeBufferLocked frees up the given buffer slot. If the slot has been |
| // initialized this will release the reference to the GraphicBuffer in |
| // that slot. Otherwise it has no effect. |
| // |
| // This method must be called with mMutex locked. |
| virtual void freeBufferLocked(int slotIndex) EXCLUDES(mImagesMutex); |
| |
| // IConsumerListener interface |
| void onDisconnect() override; |
| void onSidebandStreamChanged() override; |
| void addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps, |
| FrameEventHistoryDelta* outDelta) override; |
| |
| // computeCurrentTransformMatrixLocked computes the transform matrix for the |
| // current texture. It uses mCurrentTransform and the current GraphicBuffer |
| // to compute this matrix and stores it in mCurrentTransformMatrix. |
| // mCurrentTextureImage must not be nullptr. |
| void computeCurrentTransformMatrixLocked(); |
| |
| // doFenceWaitLocked inserts a wait command into the RenderEngine command |
| // stream to ensure that it is safe for future RenderEngine commands to |
| // access the current texture buffer. |
| status_t doFenceWaitLocked() const; |
| |
| // getCurrentCropLocked returns the cropping rectangle of the current buffer. |
| Rect getCurrentCropLocked() const; |
| |
| // The default consumer usage flags that BufferLayerConsumer always sets on its |
| // BufferQueue instance; these will be OR:d with any additional flags passed |
| // from the BufferLayerConsumer user. In particular, BufferLayerConsumer will always |
| // consume buffers as hardware textures. |
| static const uint64_t DEFAULT_USAGE_FLAGS = GraphicBuffer::USAGE_HW_TEXTURE; |
| |
| // mCurrentTextureBuffer is the buffer containing the current texture. It's |
| // possible that this buffer is not associated with any buffer slot, so we |
| // must track it separately in order to support the getCurrentBuffer method. |
| std::shared_ptr<Image> mCurrentTextureBuffer; |
| |
| // mCurrentCrop is the crop rectangle that applies to the current texture. |
| // It gets set each time updateTexImage is called. |
| Rect mCurrentCrop; |
| |
| // mCurrentTransform is the transform identifier for the current texture. It |
| // gets set each time updateTexImage is called. |
| uint32_t mCurrentTransform; |
| |
| // mCurrentScalingMode is the scaling mode for the current texture. It gets |
| // set each time updateTexImage is called. |
| uint32_t mCurrentScalingMode; |
| |
| // mCurrentFence is the fence received from BufferQueue in updateTexImage. |
| sp<Fence> mCurrentFence; |
| |
| // The FenceTime wrapper around mCurrentFence. |
| std::shared_ptr<FenceTime> mCurrentFenceTime{FenceTime::NO_FENCE}; |
| |
| // mCurrentTransformMatrix is the transform matrix for the current texture. |
| // It gets computed by computeTransformMatrix each time updateTexImage is |
| // called. |
| float mCurrentTransformMatrix[16]; |
| |
| // mCurrentTimestamp is the timestamp for the current texture. It |
| // gets set each time updateTexImage is called. |
| int64_t mCurrentTimestamp; |
| |
| // mCurrentDataSpace is the dataspace for the current texture. It |
| // gets set each time updateTexImage is called. |
| ui::Dataspace mCurrentDataSpace; |
| |
| // mCurrentHdrMetadata is the HDR metadata for the current texture. It |
| // gets set each time updateTexImage is called. |
| HdrMetadata mCurrentHdrMetadata; |
| |
| // mCurrentFrameNumber is the frame counter for the current texture. |
| // It gets set each time updateTexImage is called. |
| uint64_t mCurrentFrameNumber; |
| |
| // Indicates this buffer must be transformed by the inverse transform of the screen |
| // it is displayed onto. This is applied after BufferLayerConsumer::mCurrentTransform. |
| // This must be set/read from SurfaceFlinger's main thread. |
| bool mCurrentTransformToDisplayInverse; |
| |
| // The portion of this surface that has changed since the previous frame |
| Region mCurrentSurfaceDamage; |
| |
| int mCurrentApi; |
| |
| uint32_t mDefaultWidth, mDefaultHeight; |
| |
| // mFilteringEnabled indicates whether the transform matrix is computed for |
| // use with bilinear filtering. It defaults to true and is changed by |
| // setFilteringEnabled(). |
| bool mFilteringEnabled; |
| |
| renderengine::RenderEngine& mRE; |
| |
| // mTexName is the name of the RenderEngine texture to which streamed |
| // images will be bound when bindTexImage is called. It is set at |
| // construction time. |
| const uint32_t mTexName; |
| |
| // The layer for this BufferLayerConsumer |
| const wp<Layer> mLayer; |
| |
| wp<ContentsChangedListener> mContentsChangedListener; |
| |
| // mCurrentTexture is the buffer slot index of the buffer that is currently |
| // bound to the RenderEngine texture. It is initialized to INVALID_BUFFER_SLOT, |
| // indicating that no buffer slot is currently bound to the texture. Note, |
| // however, that a value of INVALID_BUFFER_SLOT does not necessarily mean |
| // that no buffer is bound to the texture. A call to setBufferCount will |
| // reset mCurrentTexture to INVALID_BUFFER_SLOT. |
| int mCurrentTexture; |
| |
| // Shadow buffer cache for cleaning up renderengine references. |
| std::shared_ptr<Image> mImages[BufferQueueDefs::NUM_BUFFER_SLOTS] GUARDED_BY(mImagesMutex); |
| |
| // Separate mutex guarding the shadow buffer cache. |
| // mImagesMutex can be manipulated with binder threads (e.g. onBuffersAllocated) |
| // which is contentious enough that we can't just use mMutex. |
| mutable std::mutex mImagesMutex; |
| |
| // A release that is pending on the receipt of a new release fence from |
| // presentDisplay |
| PendingRelease mPendingRelease; |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| }; // namespace android |
| |
| #endif // ANDROID_BUFFERLAYERCONSUMER_H |