| /* |
| * 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_GUI_IGRAPHICBUFFERPRODUCER_H |
| #define ANDROID_GUI_IGRAPHICBUFFERPRODUCER_H |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <utils/Errors.h> |
| #include <utils/RefBase.h> |
| |
| #include <binder/IInterface.h> |
| |
| #include <ui/Fence.h> |
| #include <ui/GraphicBuffer.h> |
| #include <ui/Rect.h> |
| #include <ui/Region.h> |
| |
| #include <gui/FrameTimestamps.h> |
| |
| #include <hidl/HybridInterface.h> |
| #include <android/hardware/graphics/bufferqueue/1.0/IGraphicBufferProducer.h> |
| |
| namespace android { |
| // ---------------------------------------------------------------------------- |
| |
| class IProducerListener; |
| class NativeHandle; |
| class Surface; |
| typedef ::android::hardware::graphics::bufferqueue::V1_0::IGraphicBufferProducer |
| HGraphicBufferProducer; |
| |
| /* |
| * This class defines the Binder IPC interface for the producer side of |
| * a queue of graphics buffers. It's used to send graphics data from one |
| * component to another. For example, a class that decodes video for |
| * playback might use this to provide frames. This is typically done |
| * indirectly, through Surface. |
| * |
| * The underlying mechanism is a BufferQueue, which implements |
| * BnGraphicBufferProducer. In normal operation, the producer calls |
| * dequeueBuffer() to get an empty buffer, fills it with data, then |
| * calls queueBuffer() to make it available to the consumer. |
| * |
| * This class was previously called ISurfaceTexture. |
| */ |
| class IGraphicBufferProducer : public IInterface |
| { |
| public: |
| DECLARE_HYBRID_META_INTERFACE(GraphicBufferProducer, HGraphicBufferProducer) |
| |
| enum { |
| // A flag returned by dequeueBuffer when the client needs to call |
| // requestBuffer immediately thereafter. |
| BUFFER_NEEDS_REALLOCATION = 0x1, |
| // A flag returned by dequeueBuffer when all mirrored slots should be |
| // released by the client. This flag should always be processed first. |
| RELEASE_ALL_BUFFERS = 0x2, |
| }; |
| |
| // requestBuffer requests a new buffer for the given index. The server (i.e. |
| // the IGraphicBufferProducer implementation) assigns the newly created |
| // buffer to the given slot index, and the client is expected to mirror the |
| // slot->buffer mapping so that it's not necessary to transfer a |
| // GraphicBuffer for every dequeue operation. |
| // |
| // The slot must be in the range of [0, NUM_BUFFER_SLOTS). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - one of the two conditions occurred: |
| // * slot was out of range (see above) |
| // * buffer specified by the slot is not dequeued |
| virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf) = 0; |
| |
| // setMaxDequeuedBufferCount sets the maximum number of buffers that can be |
| // dequeued by the producer at one time. If this method succeeds, any new |
| // buffer slots will be both unallocated and owned by the BufferQueue object |
| // (i.e. they are not owned by the producer or consumer). Calling this may |
| // also cause some buffer slots to be emptied. If the caller is caching the |
| // contents of the buffer slots, it should empty that cache after calling |
| // this method. |
| // |
| // This function should not be called with a value of maxDequeuedBuffers |
| // that is less than the number of currently dequeued buffer slots. Doing so |
| // will result in a BAD_VALUE error. |
| // |
| // The buffer count should be at least 1 (inclusive), but at most |
| // (NUM_BUFFER_SLOTS - the minimum undequeued buffer count) (exclusive). The |
| // minimum undequeued buffer count can be obtained by calling |
| // query(NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned. |
| // * BAD_VALUE - one of the below conditions occurred: |
| // * bufferCount was out of range (see above). |
| // * client would have more than the requested number of dequeued |
| // buffers after this call. |
| // * this call would cause the maxBufferCount value to be exceeded. |
| // * failure to adjust the number of available slots. |
| virtual status_t setMaxDequeuedBufferCount(int maxDequeuedBuffers) = 0; |
| |
| // Set the async flag if the producer intends to asynchronously queue |
| // buffers without blocking. Typically this is used for triple-buffering |
| // and/or when the swap interval is set to zero. |
| // |
| // Enabling async mode will internally allocate an additional buffer to |
| // allow for the asynchronous behavior. If it is not enabled queue/dequeue |
| // calls may block. |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned. |
| // * BAD_VALUE - one of the following has occurred: |
| // * this call would cause the maxBufferCount value to be |
| // exceeded |
| // * failure to adjust the number of available slots. |
| virtual status_t setAsyncMode(bool async) = 0; |
| |
| // dequeueBuffer requests a new buffer slot for the client to use. Ownership |
| // of the slot is transfered to the client, meaning that the server will not |
| // use the contents of the buffer associated with that slot. |
| // |
| // The slot index returned may or may not contain a buffer (client-side). |
| // If the slot is empty the client should call requestBuffer to assign a new |
| // buffer to that slot. |
| // |
| // Once the client is done filling this buffer, it is expected to transfer |
| // buffer ownership back to the server with either cancelBuffer on |
| // the dequeued slot or to fill in the contents of its associated buffer |
| // contents and call queueBuffer. |
| // |
| // If dequeueBuffer returns the BUFFER_NEEDS_REALLOCATION flag, the client is |
| // expected to call requestBuffer immediately. |
| // |
| // If dequeueBuffer returns the RELEASE_ALL_BUFFERS flag, the client is |
| // expected to release all of the mirrored slot->buffer mappings. |
| // |
| // The fence parameter will be updated to hold the fence associated with |
| // the buffer. The contents of the buffer must not be overwritten until the |
| // fence signals. If the fence is Fence::NO_FENCE, the buffer may be written |
| // immediately. |
| // |
| // The width and height parameters must be no greater than the minimum of |
| // GL_MAX_VIEWPORT_DIMS and GL_MAX_TEXTURE_SIZE (see: glGetIntegerv). |
| // An error due to invalid dimensions might not be reported until |
| // updateTexImage() is called. If width and height are both zero, the |
| // default values specified by setDefaultBufferSize() are used instead. |
| // |
| // If the format is 0, the default format will be used. |
| // |
| // The usage argument specifies gralloc buffer usage flags. The values |
| // are enumerated in <gralloc.h>, e.g. GRALLOC_USAGE_HW_RENDER. These |
| // will be merged with the usage flags specified by |
| // IGraphicBufferConsumer::setConsumerUsageBits. |
| // |
| // This call will block until a buffer is available to be dequeued. If |
| // both the producer and consumer are controlled by the app, then this call |
| // can never block and will return WOULD_BLOCK if no buffer is available. |
| // |
| // A non-negative value with flags set (see above) will be returned upon |
| // success. |
| // |
| // Return of a negative means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - both in async mode and buffer count was less than the |
| // max numbers of buffers that can be allocated at once. |
| // * INVALID_OPERATION - cannot attach the buffer because it would cause |
| // too many buffers to be dequeued, either because |
| // the producer already has a single buffer dequeued |
| // and did not set a buffer count, or because a |
| // buffer count was set and this call would cause |
| // it to be exceeded. |
| // * WOULD_BLOCK - no buffer is currently available, and blocking is disabled |
| // since both the producer/consumer are controlled by app |
| // * NO_MEMORY - out of memory, cannot allocate the graphics buffer. |
| // * TIMED_OUT - the timeout set by setDequeueTimeout was exceeded while |
| // waiting for a buffer to become available. |
| // |
| // All other negative values are an unknown error returned downstream |
| // from the graphics allocator (typically errno). |
| virtual status_t dequeueBuffer(int* slot, sp<Fence>* fence, uint32_t w, |
| uint32_t h, PixelFormat format, uint32_t usage, |
| FrameEventHistoryDelta* outTimestamps) = 0; |
| |
| // detachBuffer attempts to remove all ownership of the buffer in the given |
| // slot from the buffer queue. If this call succeeds, the slot will be |
| // freed, and there will be no way to obtain the buffer from this interface. |
| // The freed slot will remain unallocated until either it is selected to |
| // hold a freshly allocated buffer in dequeueBuffer or a buffer is attached |
| // to the slot. The buffer must have already been dequeued, and the caller |
| // must already possesses the sp<GraphicBuffer> (i.e., must have called |
| // requestBuffer). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - the given slot number is invalid, either because it is |
| // out of the range [0, NUM_BUFFER_SLOTS), or because the slot |
| // it refers to is not currently dequeued and requested. |
| virtual status_t detachBuffer(int slot) = 0; |
| |
| // detachNextBuffer is equivalent to calling dequeueBuffer, requestBuffer, |
| // and detachBuffer in sequence, except for two things: |
| // |
| // 1) It is unnecessary to know the dimensions, format, or usage of the |
| // next buffer. |
| // 2) It will not block, since if it cannot find an appropriate buffer to |
| // return, it will return an error instead. |
| // |
| // Only slots that are free but still contain a GraphicBuffer will be |
| // considered, and the oldest of those will be returned. outBuffer is |
| // equivalent to outBuffer from the requestBuffer call, and outFence is |
| // equivalent to fence from the dequeueBuffer call. |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - either outBuffer or outFence were NULL. |
| // * NO_MEMORY - no slots were found that were both free and contained a |
| // GraphicBuffer. |
| virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer, |
| sp<Fence>* outFence) = 0; |
| |
| // attachBuffer attempts to transfer ownership of a buffer to the buffer |
| // queue. If this call succeeds, it will be as if this buffer was dequeued |
| // from the returned slot number. As such, this call will fail if attaching |
| // this buffer would cause too many buffers to be simultaneously dequeued. |
| // |
| // If attachBuffer returns the RELEASE_ALL_BUFFERS flag, the caller is |
| // expected to release all of the mirrored slot->buffer mappings. |
| // |
| // A non-negative value with flags set (see above) will be returned upon |
| // success. |
| // |
| // Return of a negative value means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - outSlot or buffer were NULL, invalid combination of |
| // async mode and buffer count override, or the generation |
| // number of the buffer did not match the buffer queue. |
| // * INVALID_OPERATION - cannot attach the buffer because it would cause |
| // too many buffers to be dequeued, either because |
| // the producer already has a single buffer dequeued |
| // and did not set a buffer count, or because a |
| // buffer count was set and this call would cause |
| // it to be exceeded. |
| // * WOULD_BLOCK - no buffer slot is currently available, and blocking is |
| // disabled since both the producer/consumer are |
| // controlled by the app. |
| // * TIMED_OUT - the timeout set by setDequeueTimeout was exceeded while |
| // waiting for a slot to become available. |
| virtual status_t attachBuffer(int* outSlot, |
| const sp<GraphicBuffer>& buffer) = 0; |
| |
| // queueBuffer indicates that the client has finished filling in the |
| // contents of the buffer associated with slot and transfers ownership of |
| // that slot back to the server. |
| // |
| // It is not valid to call queueBuffer on a slot that is not owned |
| // by the client or one for which a buffer associated via requestBuffer |
| // (an attempt to do so will fail with a return value of BAD_VALUE). |
| // |
| // In addition, the input must be described by the client (as documented |
| // below). Any other properties (zero point, etc) |
| // are client-dependent, and should be documented by the client. |
| // |
| // The slot must be in the range of [0, NUM_BUFFER_SLOTS). |
| // |
| // Upon success, the output will be filled with meaningful values |
| // (refer to the documentation below). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - one of the below conditions occurred: |
| // * fence was NULL |
| // * scaling mode was unknown |
| // * both in async mode and buffer count was less than the |
| // max numbers of buffers that can be allocated at once |
| // * slot index was out of range (see above). |
| // * the slot was not in the dequeued state |
| // * the slot was enqueued without requesting a buffer |
| // * crop rect is out of bounds of the buffer dimensions |
| |
| struct QueueBufferInput : public Flattenable<QueueBufferInput> { |
| friend class Flattenable<QueueBufferInput>; |
| explicit inline QueueBufferInput(const Parcel& parcel); |
| |
| // timestamp - a monotonically increasing value in nanoseconds |
| // isAutoTimestamp - if the timestamp was synthesized at queue time |
| // dataSpace - description of the contents, interpretation depends on format |
| // crop - a crop rectangle that's used as a hint to the consumer |
| // scalingMode - a set of flags from NATIVE_WINDOW_SCALING_* in <window.h> |
| // transform - a set of flags from NATIVE_WINDOW_TRANSFORM_* in <window.h> |
| // fence - a fence that the consumer must wait on before reading the buffer, |
| // set this to Fence::NO_FENCE if the buffer is ready immediately |
| // sticky - the sticky transform set in Surface (only used by the LEGACY |
| // camera mode). |
| // getFrameTimestamps - whether or not the latest frame timestamps |
| // should be retrieved from the consumer. |
| inline QueueBufferInput(int64_t _timestamp, bool _isAutoTimestamp, |
| android_dataspace _dataSpace, const Rect& _crop, |
| int _scalingMode, uint32_t _transform, const sp<Fence>& _fence, |
| uint32_t _sticky = 0, bool _getFrameTimestamps = false) |
| : timestamp(_timestamp), isAutoTimestamp(_isAutoTimestamp), |
| dataSpace(_dataSpace), crop(_crop), scalingMode(_scalingMode), |
| transform(_transform), stickyTransform(_sticky), fence(_fence), |
| surfaceDamage(), getFrameTimestamps(_getFrameTimestamps) { } |
| |
| inline void deflate(int64_t* outTimestamp, bool* outIsAutoTimestamp, |
| android_dataspace* outDataSpace, |
| Rect* outCrop, int* outScalingMode, |
| uint32_t* outTransform, sp<Fence>* outFence, |
| uint32_t* outStickyTransform = nullptr, |
| bool* outGetFrameTimestamps = nullptr) const { |
| *outTimestamp = timestamp; |
| *outIsAutoTimestamp = bool(isAutoTimestamp); |
| *outDataSpace = dataSpace; |
| *outCrop = crop; |
| *outScalingMode = scalingMode; |
| *outTransform = transform; |
| *outFence = fence; |
| if (outStickyTransform != NULL) { |
| *outStickyTransform = stickyTransform; |
| } |
| if (outGetFrameTimestamps) { |
| *outGetFrameTimestamps = getFrameTimestamps; |
| } |
| } |
| |
| // Flattenable protocol |
| static constexpr size_t minFlattenedSize(); |
| size_t getFlattenedSize() const; |
| size_t getFdCount() const; |
| status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const; |
| status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count); |
| |
| const Region& getSurfaceDamage() const { return surfaceDamage; } |
| void setSurfaceDamage(const Region& damage) { surfaceDamage = damage; } |
| |
| private: |
| int64_t timestamp{0}; |
| int isAutoTimestamp{0}; |
| android_dataspace dataSpace{HAL_DATASPACE_UNKNOWN}; |
| Rect crop; |
| int scalingMode{0}; |
| uint32_t transform{0}; |
| uint32_t stickyTransform{0}; |
| sp<Fence> fence; |
| Region surfaceDamage; |
| bool getFrameTimestamps{false}; |
| }; |
| |
| struct QueueBufferOutput : public Flattenable<QueueBufferOutput> { |
| QueueBufferOutput() = default; |
| |
| // Moveable. |
| QueueBufferOutput(QueueBufferOutput&& src) = default; |
| QueueBufferOutput& operator=(QueueBufferOutput&& src) = default; |
| // Not copyable. |
| QueueBufferOutput(const QueueBufferOutput& src) = delete; |
| QueueBufferOutput& operator=(const QueueBufferOutput& src) = delete; |
| |
| // Flattenable protocol |
| static constexpr size_t minFlattenedSize(); |
| size_t getFlattenedSize() const; |
| size_t getFdCount() const; |
| status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const; |
| status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count); |
| |
| uint32_t width{0}; |
| uint32_t height{0}; |
| uint32_t transformHint{0}; |
| uint32_t numPendingBuffers{0}; |
| uint64_t nextFrameNumber{0}; |
| FrameEventHistoryDelta frameTimestamps; |
| bool bufferReplaced{false}; |
| }; |
| |
| virtual status_t queueBuffer(int slot, const QueueBufferInput& input, |
| QueueBufferOutput* output) = 0; |
| |
| // cancelBuffer indicates that the client does not wish to fill in the |
| // buffer associated with slot and transfers ownership of the slot back to |
| // the server. |
| // |
| // The buffer is not queued for use by the consumer. |
| // |
| // The slot must be in the range of [0, NUM_BUFFER_SLOTS). |
| // |
| // The buffer will not be overwritten until the fence signals. The fence |
| // will usually be the one obtained from dequeueBuffer. |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned or the producer is not |
| // connected. |
| // * BAD_VALUE - one of the below conditions occurred: |
| // * fence was NULL |
| // * slot index was out of range (see above). |
| // * the slot was not in the dequeued state |
| virtual status_t cancelBuffer(int slot, const sp<Fence>& fence) = 0; |
| |
| // query retrieves some information for this surface |
| // 'what' tokens allowed are that of NATIVE_WINDOW_* in <window.h> |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - the buffer queue has been abandoned. |
| // * BAD_VALUE - what was out of range |
| virtual int query(int what, int* value) = 0; |
| |
| // connect attempts to connect a client API to the IGraphicBufferProducer. |
| // This must be called before any other IGraphicBufferProducer methods are |
| // called except for getAllocator. A consumer must be already connected. |
| // |
| // This method will fail if the connect was previously called on the |
| // IGraphicBufferProducer and no corresponding disconnect call was made. |
| // |
| // The listener is an optional binder callback object that can be used if |
| // the producer wants to be notified when the consumer releases a buffer |
| // back to the BufferQueue. It is also used to detect the death of the |
| // producer. If only the latter functionality is desired, there is a |
| // DummyProducerListener class in IProducerListener.h that can be used. |
| // |
| // The api should be one of the NATIVE_WINDOW_API_* values in <window.h> |
| // |
| // The producerControlledByApp should be set to true if the producer is hosted |
| // by an untrusted process (typically app_process-forked processes). If both |
| // the producer and the consumer are app-controlled then all buffer queues |
| // will operate in async mode regardless of the async flag. |
| // |
| // Upon success, the output will be filled with meaningful data |
| // (refer to QueueBufferOutput documentation above). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * NO_INIT - one of the following occurred: |
| // * the buffer queue was abandoned |
| // * no consumer has yet connected |
| // * BAD_VALUE - one of the following has occurred: |
| // * the producer is already connected |
| // * api was out of range (see above). |
| // * output was NULL. |
| // * Failure to adjust the number of available slots. This can |
| // happen because of trying to allocate/deallocate the async |
| // buffer in response to the value of producerControlledByApp. |
| // * DEAD_OBJECT - the token is hosted by an already-dead process |
| // |
| // Additional negative errors may be returned by the internals, they |
| // should be treated as opaque fatal unrecoverable errors. |
| virtual status_t connect(const sp<IProducerListener>& listener, |
| int api, bool producerControlledByApp, QueueBufferOutput* output) = 0; |
| |
| enum class DisconnectMode { |
| // Disconnect only the specified API. |
| Api, |
| // Disconnect any API originally connected from the process calling disconnect. |
| AllLocal |
| }; |
| |
| // disconnect attempts to disconnect a client API from the |
| // IGraphicBufferProducer. Calling this method will cause any subsequent |
| // calls to other IGraphicBufferProducer methods to fail except for |
| // getAllocator and connect. Successfully calling connect after this will |
| // allow the other methods to succeed again. |
| // |
| // The api should be one of the NATIVE_WINDOW_API_* values in <window.h> |
| // |
| // Alternatively if mode is AllLocal, then the API value is ignored, and any API |
| // connected from the same PID calling disconnect will be disconnected. |
| // |
| // Disconnecting from an abandoned IGraphicBufferProducer is legal and |
| // is considered a no-op. |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * BAD_VALUE - one of the following has occurred: |
| // * the api specified does not match the one that was connected |
| // * api was out of range (see above). |
| // * DEAD_OBJECT - the token is hosted by an already-dead process |
| virtual status_t disconnect(int api, DisconnectMode mode = DisconnectMode::Api) = 0; |
| |
| // Attaches a sideband buffer stream to the IGraphicBufferProducer. |
| // |
| // A sideband stream is a device-specific mechanism for passing buffers |
| // from the producer to the consumer without using dequeueBuffer/ |
| // queueBuffer. If a sideband stream is present, the consumer can choose |
| // whether to acquire buffers from the sideband stream or from the queued |
| // buffers. |
| // |
| // Passing NULL or a different stream handle will detach the previous |
| // handle if any. |
| virtual status_t setSidebandStream(const sp<NativeHandle>& stream) = 0; |
| |
| // Allocates buffers based on the given dimensions/format. |
| // |
| // This function will allocate up to the maximum number of buffers |
| // permitted by the current BufferQueue configuration. It will use the |
| // given format, dimensions, and usage bits, which are interpreted in the |
| // same way as for dequeueBuffer, and the async flag must be set the same |
| // way as for dequeueBuffer to ensure that the correct number of buffers are |
| // allocated. This is most useful to avoid an allocation delay during |
| // dequeueBuffer. If there are already the maximum number of buffers |
| // allocated, this function has no effect. |
| virtual void allocateBuffers(uint32_t width, uint32_t height, |
| PixelFormat format, uint32_t usage) = 0; |
| |
| // Sets whether dequeueBuffer is allowed to allocate new buffers. |
| // |
| // Normally dequeueBuffer does not discriminate between free slots which |
| // already have an allocated buffer and those which do not, and will |
| // allocate a new buffer if the slot doesn't have a buffer or if the slot's |
| // buffer doesn't match the requested size, format, or usage. This method |
| // allows the producer to restrict the eligible slots to those which already |
| // have an allocated buffer of the correct size, format, and usage. If no |
| // eligible slot is available, dequeueBuffer will block or return an error |
| // as usual. |
| virtual status_t allowAllocation(bool allow) = 0; |
| |
| // Sets the current generation number of the BufferQueue. |
| // |
| // This generation number will be inserted into any buffers allocated by the |
| // BufferQueue, and any attempts to attach a buffer with a different |
| // generation number will fail. Buffers already in the queue are not |
| // affected and will retain their current generation number. The generation |
| // number defaults to 0. |
| virtual status_t setGenerationNumber(uint32_t generationNumber) = 0; |
| |
| // Returns the name of the connected consumer. |
| virtual String8 getConsumerName() const = 0; |
| |
| // Used to enable/disable shared buffer mode. |
| // |
| // When shared buffer mode is enabled the first buffer that is queued or |
| // dequeued will be cached and returned to all subsequent calls to |
| // dequeueBuffer and acquireBuffer. This allows the producer and consumer to |
| // simultaneously access the same buffer. |
| virtual status_t setSharedBufferMode(bool sharedBufferMode) = 0; |
| |
| // Used to enable/disable auto-refresh. |
| // |
| // Auto refresh has no effect outside of shared buffer mode. In shared |
| // buffer mode, when enabled, it indicates to the consumer that it should |
| // attempt to acquire buffers even if it is not aware of any being |
| // available. |
| virtual status_t setAutoRefresh(bool autoRefresh) = 0; |
| |
| // Sets how long dequeueBuffer will wait for a buffer to become available |
| // before returning an error (TIMED_OUT). |
| // |
| // This timeout also affects the attachBuffer call, which will block if |
| // there is not a free slot available into which the attached buffer can be |
| // placed. |
| // |
| // By default, the BufferQueue will wait forever, which is indicated by a |
| // timeout of -1. If set (to a value other than -1), this will disable |
| // non-blocking mode and its corresponding spare buffer (which is used to |
| // ensure a buffer is always available). |
| // |
| // Return of a value other than NO_ERROR means an error has occurred: |
| // * BAD_VALUE - Failure to adjust the number of available slots. This can |
| // happen because of trying to allocate/deallocate the async |
| // buffer. |
| virtual status_t setDequeueTimeout(nsecs_t timeout) = 0; |
| |
| // Returns the last queued buffer along with a fence which must signal |
| // before the contents of the buffer are read. If there are no buffers in |
| // the queue, outBuffer will be populated with nullptr and outFence will be |
| // populated with Fence::NO_FENCE |
| // |
| // outTransformMatrix is not modified if outBuffer is null. |
| // |
| // Returns NO_ERROR or the status of the Binder transaction |
| virtual status_t getLastQueuedBuffer(sp<GraphicBuffer>* outBuffer, |
| sp<Fence>* outFence, float outTransformMatrix[16]) = 0; |
| |
| // Gets the frame events that haven't already been retrieved. |
| virtual void getFrameTimestamps(FrameEventHistoryDelta* /*outDelta*/) {} |
| |
| // Returns a unique id for this BufferQueue |
| virtual status_t getUniqueId(uint64_t* outId) const = 0; |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| |
| class BnGraphicBufferProducer : public BnInterface<IGraphicBufferProducer> |
| { |
| public: |
| virtual status_t onTransact( uint32_t code, |
| const Parcel& data, |
| Parcel* reply, |
| uint32_t flags = 0); |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| }; // namespace android |
| |
| #endif // ANDROID_GUI_IGRAPHICBUFFERPRODUCER_H |