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Diffstat (limited to 'widget/gonk/nativewindow/GonkBufferQueueJB.h')
| -rw-r--r-- | widget/gonk/nativewindow/GonkBufferQueueJB.h | 653 |
1 files changed, 0 insertions, 653 deletions
diff --git a/widget/gonk/nativewindow/GonkBufferQueueJB.h b/widget/gonk/nativewindow/GonkBufferQueueJB.h deleted file mode 100644 index df0c4599f..000000000 --- a/widget/gonk/nativewindow/GonkBufferQueueJB.h +++ /dev/null @@ -1,653 +0,0 @@ -/* - * Copyright (C) 2012 The Android Open Source Project - * Copyright (C) 2013 Mozilla Foundation - * - * 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 NATIVEWINDOW_GONKBUFFERQUEUE_JB_H -#define NATIVEWINDOW_GONKBUFFERQUEUE_JB_H - -#include <gui/IGraphicBufferAlloc.h> -#if ANDROID_VERSION == 17 -#include <gui/ISurfaceTexture.h> -#else -#include <gui/IGraphicBufferProducer.h> -#endif - -#include <ui/Fence.h> -#include <ui/GraphicBuffer.h> - -#include <utils/String8.h> -#include <utils/Vector.h> -#include <utils/threads.h> - -#include "mozilla/layers/LayersSurfaces.h" -#include "mozilla/layers/TextureClient.h" - -#if ANDROID_VERSION == 17 -#define IGraphicBufferProducer ISurfaceTexture -#endif - -namespace android { -// ---------------------------------------------------------------------------- - -#if ANDROID_VERSION == 17 -class GonkBufferQueue : public BnSurfaceTexture { -#else -class GonkBufferQueue : public BnGraphicBufferProducer { -#endif - typedef mozilla::layers::TextureClient TextureClient; - -public: - enum { MIN_UNDEQUEUED_BUFFERS = 2 }; - enum { NUM_BUFFER_SLOTS = 32 }; - enum { NO_CONNECTED_API = 0 }; - enum { INVALID_BUFFER_SLOT = -1 }; - enum { STALE_BUFFER_SLOT = 1, NO_BUFFER_AVAILABLE }; - - // When in async mode we reserve two slots in order to guarantee that the - // producer and consumer can run asynchronously. - enum { MAX_MAX_ACQUIRED_BUFFERS = NUM_BUFFER_SLOTS - 2 }; - - // ConsumerListener is the interface through which the GonkBufferQueue notifies - // the consumer of events that the consumer may wish to react to. Because - // the consumer will generally have a mutex that is locked during calls from - // the consumer to the GonkBufferQueue, these calls from the GonkBufferQueue to the - // consumer *MUST* be called only when the GonkBufferQueue mutex is NOT locked. - struct ConsumerListener : public virtual RefBase { - // onFrameAvailable is called from queueBuffer each time an additional - // frame becomes available for consumption. This means that frames that - // are queued while in asynchronous mode only trigger the callback if no - // previous frames are pending. Frames queued while in synchronous mode - // always trigger the callback. - // - // This is called without any lock held and can be called concurrently - // by multiple threads. - virtual void onFrameAvailable() = 0; - - // onBuffersReleased is called to notify the buffer consumer that the - // GonkBufferQueue has released its references to one or more GraphicBuffers - // contained in its slots. The buffer consumer should then call - // GonkBufferQueue::getReleasedBuffers to retrieve the list of buffers - // - // This is called without any lock held and can be called concurrently - // by multiple threads. - virtual void onBuffersReleased() = 0; - }; - - // ProxyConsumerListener is a ConsumerListener implementation that keeps a weak - // reference to the actual consumer object. It forwards all calls to that - // consumer object so long as it exists. - // - // This class exists to avoid having a circular reference between the - // GonkBufferQueue object and the consumer object. The reason this can't be a weak - // reference in the GonkBufferQueue class is because we're planning to expose the - // consumer side of a GonkBufferQueue as a binder interface, which doesn't support - // weak references. - class ProxyConsumerListener : public GonkBufferQueue::ConsumerListener { - public: - - ProxyConsumerListener(const wp<GonkBufferQueue::ConsumerListener>& consumerListener); - virtual ~ProxyConsumerListener(); - virtual void onFrameAvailable(); - virtual void onBuffersReleased(); - - private: - - // mConsumerListener is a weak reference to the ConsumerListener. This is - // the raison d'etre of ProxyConsumerListener. - wp<GonkBufferQueue::ConsumerListener> mConsumerListener; - }; - - - // GonkBufferQueue manages a pool of gralloc memory slots to be used by - // producers and consumers. allowSynchronousMode specifies whether or not - // synchronous mode can be enabled by the producer. allocator is used to - // allocate all the needed gralloc buffers. - GonkBufferQueue(bool allowSynchronousMode = true, - const sp<IGraphicBufferAlloc>& allocator = NULL); - virtual ~GonkBufferQueue(); - - // Query native window attributes. The "what" values are enumerated in - // window.h (e.g. NATIVE_WINDOW_FORMAT). - virtual int query(int what, int* value); - - // setBufferCount updates the number of available buffer slots. If this - // method succeeds, buffer slots will be both unallocated and owned by - // the GonkBufferQueue object (i.e. they are not owned by the producer or - // consumer). - // - // This will fail if the producer has dequeued any buffers, or if - // bufferCount is invalid. bufferCount must generally be a value - // between the minimum undequeued buffer count and NUM_BUFFER_SLOTS - // (inclusive). It may also be set to zero (the default) to indicate - // that the producer does not wish to set a value. The minimum value - // can be obtained by calling query(NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, - // ...). - // - // This may only be called by the producer. The consumer will be told - // to discard buffers through the onBuffersReleased callback. - virtual status_t setBufferCount(int bufferCount); - - // requestBuffer returns the GraphicBuffer for slot N. - // - // In normal operation, this is called the first time slot N is returned - // by dequeueBuffer. It must be called again if dequeueBuffer returns - // flags indicating that previously-returned buffers are no longer valid. - virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf); - - // dequeueBuffer gets the next buffer slot index for the producer to use. - // If a buffer slot is available then that slot index is written to the - // location pointed to by the buf argument and a status of OK is returned. - // If no slot is available then a status of -EBUSY is returned and buf is - // unmodified. - // - // 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. - // - // The pixel formats are enumerated in graphics.h, e.g. - // HAL_PIXEL_FORMAT_RGBA_8888. 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 setConsumerUsageBits. - // - // The return value may be a negative error value or a non-negative - // collection of flags. If the flags are set, the return values are - // valid, but additional actions must be performed. - // - // If IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION is set, the - // producer must discard cached GraphicBuffer references for the slot - // returned in buf. - // If IGraphicBufferProducer::RELEASE_ALL_BUFFERS is set, the producer - // must discard cached GraphicBuffer references for all slots. - // - // In both cases, the producer will need to call requestBuffer to get a - // GraphicBuffer handle for the returned slot. -#if ANDROID_VERSION == 17 - virtual status_t dequeueBuffer(int *buf, sp<Fence>& fence, - uint32_t width, uint32_t height, uint32_t format, uint32_t usage) { - return dequeueBuffer(buf, &fence, width, height, format, usage); - } -#endif - - virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, - uint32_t width, uint32_t height, uint32_t format, uint32_t usage); - - // queueBuffer returns a filled buffer to the GonkBufferQueue. - // - // Additional data is provided in the QueueBufferInput struct. Notably, - // a timestamp must be provided for the buffer. The timestamp is in - // nanoseconds, and must be monotonically increasing. Its other semantics - // (zero point, etc) are producer-specific and should be documented by the - // producer. - // - // The caller may provide a fence that signals when all rendering - // operations have completed. Alternatively, NO_FENCE may be used, - // indicating that the buffer is ready immediately. - // - // Some values are returned in the output struct: the current settings - // for default width and height, the current transform hint, and the - // number of queued buffers. - virtual status_t queueBuffer(int buf, - const QueueBufferInput& input, QueueBufferOutput* output); - - // cancelBuffer returns a dequeued buffer to the GonkBufferQueue, but doesn't - // queue it for use by the consumer. - // - // The buffer will not be overwritten until the fence signals. The fence - // will usually be the one obtained from dequeueBuffer. -#if ANDROID_VERSION == 17 - virtual void cancelBuffer(int buf, sp<Fence> fence); -#else - virtual void cancelBuffer(int buf, const sp<Fence>& fence); -#endif - - // setSynchronousMode sets whether dequeueBuffer is synchronous or - // asynchronous. In synchronous mode, dequeueBuffer blocks until - // a buffer is available, the currently bound buffer can be dequeued and - // queued buffers will be acquired in order. In asynchronous mode, - // a queued buffer may be replaced by a subsequently queued buffer. - // - // The default mode is synchronous. - // This should be called only during initialization. - virtual status_t setSynchronousMode(bool enabled); - - // connect attempts to connect a producer API to the GonkBufferQueue. This - // must be called before any other IGraphicBufferProducer methods are - // called except for getAllocator. A consumer must already be connected. - // - // This method will fail if connect was previously called on the - // GonkBufferQueue and no corresponding disconnect call was made (i.e. if - // it's still connected to a producer). - // - // APIs are enumerated in window.h (e.g. NATIVE_WINDOW_API_CPU). - virtual status_t connect(int api, QueueBufferOutput* output); - - // disconnect attempts to disconnect a producer API from the GonkBufferQueue. - // 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. - // - // This method will fail if the the GonkBufferQueue is not currently - // connected to the specified producer API. - virtual status_t disconnect(int api); - - // dump our state in a String - virtual void dumpToString(String8& result) const; - virtual void dumpToString(String8& result, const char* prefix, char* buffer, size_t SIZE) const; - - // public facing structure for BufferSlot - struct BufferItem { - - BufferItem() - : - mTransform(0), - mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), - mTimestamp(0), - mFrameNumber(0), - mBuf(INVALID_BUFFER_SLOT) { - mCrop.makeInvalid(); - } - // mGraphicBuffer points to the buffer allocated for this slot, or is NULL - // if the buffer in this slot has been acquired in the past (see - // BufferSlot.mAcquireCalled). - sp<GraphicBuffer> mGraphicBuffer; - - // mCrop is the current crop rectangle for this buffer slot. - Rect mCrop; - - // mTransform is the current transform flags for this buffer slot. - uint32_t mTransform; - - // mScalingMode is the current scaling mode for this buffer slot. - uint32_t mScalingMode; - - // mTimestamp is the current timestamp for this buffer slot. This gets - // to set by queueBuffer each time this slot is queued. - int64_t mTimestamp; - - // mFrameNumber is the number of the queued frame for this slot. - uint64_t mFrameNumber; - - // mBuf is the slot index of this buffer - int mBuf; - - // mFence is a fence that will signal when the buffer is idle. - sp<Fence> mFence; - }; - - // The following public functions are the consumer-facing interface - - // acquireBuffer attempts to acquire ownership of the next pending buffer in - // the GonkBufferQueue. If no buffer is pending then it returns -EINVAL. If a - // buffer is successfully acquired, the information about the buffer is - // returned in BufferItem. If the buffer returned had previously been - // acquired then the BufferItem::mGraphicBuffer field of buffer is set to - // NULL and it is assumed that the consumer still holds a reference to the - // buffer. - status_t acquireBuffer(BufferItem *buffer); - - // releaseBuffer releases a buffer slot from the consumer back to the - // GonkBufferQueue. This may be done while the buffer's contents are still - // being accessed. The fence will signal when the buffer is no longer - // in use. - // - // If releaseBuffer returns STALE_BUFFER_SLOT, then the consumer must free - // any references to the just-released buffer that it might have, as if it - // had received a onBuffersReleased() call with a mask set for the released - // buffer. - // - // Note that the dependencies on EGL will be removed once we switch to using - // the Android HW Sync HAL. - status_t releaseBuffer(int buf, const sp<Fence>& releaseFence); - - // consumerConnect connects a consumer to the GonkBufferQueue. Only one - // consumer may be connected, and when that consumer disconnects the - // GonkBufferQueue is placed into the "abandoned" state, causing most - // interactions with the GonkBufferQueue by the producer to fail. - // - // consumer may not be NULL. - status_t consumerConnect(const sp<ConsumerListener>& consumer); - - // consumerDisconnect disconnects a consumer from the GonkBufferQueue. All - // buffers will be freed and the GonkBufferQueue is placed in the "abandoned" - // state, causing most interactions with the GonkBufferQueue by the producer to - // fail. - status_t consumerDisconnect(); - - // getReleasedBuffers sets the value pointed to by slotMask to a bit mask - // indicating which buffer slots have been released by the GonkBufferQueue - // but have not yet been released by the consumer. - // - // This should be called from the onBuffersReleased() callback. - status_t getReleasedBuffers(uint32_t* slotMask); - - // setDefaultBufferSize is used to set the size of buffers returned by - // dequeueBuffer when a width and height of zero is requested. Default - // is 1x1. - status_t setDefaultBufferSize(uint32_t w, uint32_t h); - - // setDefaultMaxBufferCount sets the default value for the maximum buffer - // count (the initial default is 2). If the producer has requested a - // buffer count using setBufferCount, the default buffer count will only - // take effect if the producer sets the count back to zero. - // - // The count must be between 2 and NUM_BUFFER_SLOTS, inclusive. - status_t setDefaultMaxBufferCount(int bufferCount); - - // setMaxAcquiredBufferCount sets the maximum number of buffers that can - // be acquired by the consumer at one time (default 1). This call will - // fail if a producer is connected to the GonkBufferQueue. - status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers); - - // isSynchronousMode returns whether the GonkBufferQueue is currently in - // synchronous mode. - bool isSynchronousMode() const; - - // setConsumerName sets the name used in logging - void setConsumerName(const String8& name); - - // setDefaultBufferFormat allows the GonkBufferQueue to create - // GraphicBuffers of a defaultFormat if no format is specified - // in dequeueBuffer. Formats are enumerated in graphics.h; the - // initial default is HAL_PIXEL_FORMAT_RGBA_8888. - status_t setDefaultBufferFormat(uint32_t defaultFormat); - - // setConsumerUsageBits will turn on additional usage bits for dequeueBuffer. - // These are merged with the bits passed to dequeueBuffer. The values are - // enumerated in gralloc.h, e.g. GRALLOC_USAGE_HW_RENDER; the default is 0. - status_t setConsumerUsageBits(uint32_t usage); - - // setTransformHint bakes in rotation to buffers so overlays can be used. - // The values are enumerated in window.h, e.g. - // NATIVE_WINDOW_TRANSFORM_ROT_90. The default is 0 (no transform). - status_t setTransformHint(uint32_t hint); - - already_AddRefed<TextureClient> getTextureClientFromBuffer(ANativeWindowBuffer* buffer); - - int getSlotFromTextureClientLocked(TextureClient* client) const; - -private: - // freeBufferLocked frees the GraphicBuffer and sync resources for the - // given slot. - //void freeBufferLocked(int index); - - // freeAllBuffersLocked frees the GraphicBuffer and sync resources for - // all slots. - //void freeAllBuffersLocked(); - void freeAllBuffersLocked(); - - // setDefaultMaxBufferCountLocked sets the maximum number of buffer slots - // that will be used if the producer does not override the buffer slot - // count. The count must be between 2 and NUM_BUFFER_SLOTS, inclusive. - // The initial default is 2. - status_t setDefaultMaxBufferCountLocked(int count); - - // getMinBufferCountLocked returns the minimum number of buffers allowed - // given the current GonkBufferQueue state. - int getMinMaxBufferCountLocked() const; - - // getMinUndequeuedBufferCountLocked returns the minimum number of buffers - // that must remain in a state other than DEQUEUED. - int getMinUndequeuedBufferCountLocked() const; - - // getMaxBufferCountLocked returns the maximum number of buffers that can - // be allocated at once. This value depends upon the following member - // variables: - // - // mSynchronousMode - // mMaxAcquiredBufferCount - // mDefaultMaxBufferCount - // mOverrideMaxBufferCount - // - // Any time one of these member variables is changed while a producer is - // connected, mDequeueCondition must be broadcast. - int getMaxBufferCountLocked() const; - - struct BufferSlot { - - BufferSlot() - : mBufferState(BufferSlot::FREE), - mRequestBufferCalled(false), - mTransform(0), - mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), - mTimestamp(0), - mFrameNumber(0), - mAcquireCalled(false), - mNeedsCleanupOnRelease(false) { - mCrop.makeInvalid(); - } - - // mGraphicBuffer points to the buffer allocated for this slot or is NULL - // if no buffer has been allocated. - sp<GraphicBuffer> mGraphicBuffer; - - // mTextureClient is a thin abstraction over remotely allocated GraphicBuffer. - RefPtr<TextureClient> mTextureClient; - - // BufferState represents the different states in which a buffer slot - // can be. All slots are initially FREE. - enum BufferState { - // FREE indicates that the buffer is available to be dequeued - // by the producer. The buffer may be in use by the consumer for - // a finite time, so the buffer must not be modified until the - // associated fence is signaled. - // - // The slot is "owned" by GonkBufferQueue. It transitions to DEQUEUED - // when dequeueBuffer is called. - FREE = 0, - - // DEQUEUED indicates that the buffer has been dequeued by the - // producer, but has not yet been queued or canceled. The - // producer may modify the buffer's contents as soon as the - // associated ready fence is signaled. - // - // The slot is "owned" by the producer. It can transition to - // QUEUED (via queueBuffer) or back to FREE (via cancelBuffer). - DEQUEUED = 1, - - // QUEUED indicates that the buffer has been filled by the - // producer and queued for use by the consumer. The buffer - // contents may continue to be modified for a finite time, so - // the contents must not be accessed until the associated fence - // is signaled. - // - // The slot is "owned" by GonkBufferQueue. It can transition to - // ACQUIRED (via acquireBuffer) or to FREE (if another buffer is - // queued in asynchronous mode). - QUEUED = 2, - - // ACQUIRED indicates that the buffer has been acquired by the - // consumer. As with QUEUED, the contents must not be accessed - // by the consumer until the fence is signaled. - // - // The slot is "owned" by the consumer. It transitions to FREE - // when releaseBuffer is called. - ACQUIRED = 3 - }; - - // mBufferState is the current state of this buffer slot. - BufferState mBufferState; - - // mRequestBufferCalled is used for validating that the producer did - // call requestBuffer() when told to do so. Technically this is not - // needed but useful for debugging and catching producer bugs. - bool mRequestBufferCalled; - - // mCrop is the current crop rectangle for this buffer slot. - Rect mCrop; - - // mTransform is the current transform flags for this buffer slot. - // (example: NATIVE_WINDOW_TRANSFORM_ROT_90) - uint32_t mTransform; - - // mScalingMode is the current scaling mode for this buffer slot. - // (example: NATIVE_WINDOW_SCALING_MODE_FREEZE) - uint32_t mScalingMode; - - // mTimestamp is the current timestamp for this buffer slot. This gets - // to set by queueBuffer each time this slot is queued. - int64_t mTimestamp; - - // mFrameNumber is the number of the queued frame for this slot. This - // is used to dequeue buffers in LRU order (useful because buffers - // may be released before their release fence is signaled). - uint64_t mFrameNumber; - - // mEglFence is the EGL sync object that must signal before the buffer - // associated with this buffer slot may be dequeued. It is initialized - // to EGL_NO_SYNC_KHR when the buffer is created and may be set to a - // new sync object in releaseBuffer. (This is deprecated in favor of - // mFence, below.) - //EGLSyncKHR mEglFence; - - // mFence is a fence which will signal when work initiated by the - // previous owner of the buffer is finished. When the buffer is FREE, - // the fence indicates when the consumer has finished reading - // from the buffer, or when the producer has finished writing if it - // called cancelBuffer after queueing some writes. When the buffer is - // QUEUED, it indicates when the producer has finished filling the - // buffer. When the buffer is DEQUEUED or ACQUIRED, the fence has been - // passed to the consumer or producer along with ownership of the - // buffer, and mFence is set to NO_FENCE. - sp<Fence> mFence; - - // Indicates whether this buffer has been seen by a consumer yet - bool mAcquireCalled; - - // Indicates whether this buffer needs to be cleaned up by the - // consumer. This is set when a buffer in ACQUIRED state is freed. - // It causes releaseBuffer to return STALE_BUFFER_SLOT. - bool mNeedsCleanupOnRelease; - }; - - // mSlots is the array of buffer slots that must be mirrored on the - // producer side. This allows buffer ownership to be transferred between - // the producer and consumer without sending a GraphicBuffer over binder. - // The entire array is initialized to NULL at construction time, and - // buffers are allocated for a slot when requestBuffer is called with - // that slot's index. - BufferSlot mSlots[NUM_BUFFER_SLOTS]; - - // mDefaultWidth holds the default width of allocated buffers. It is used - // in dequeueBuffer() if a width and height of zero is specified. - uint32_t mDefaultWidth; - - // mDefaultHeight holds the default height of allocated buffers. It is used - // in dequeueBuffer() if a width and height of zero is specified. - uint32_t mDefaultHeight; - - // mMaxAcquiredBufferCount is the number of buffers that the consumer may - // acquire at one time. It defaults to 1 and can be changed by the - // consumer via the setMaxAcquiredBufferCount method, but this may only be - // done when no producer is connected to the GonkBufferQueue. - // - // This value is used to derive the value returned for the - // MIN_UNDEQUEUED_BUFFERS query by the producer. - int mMaxAcquiredBufferCount; - - // mDefaultMaxBufferCount is the default limit on the number of buffers - // that will be allocated at one time. This default limit is set by the - // consumer. The limit (as opposed to the default limit) may be - // overridden by the producer. - int mDefaultMaxBufferCount; - - // mOverrideMaxBufferCount is the limit on the number of buffers that will - // be allocated at one time. This value is set by the image producer by - // calling setBufferCount. The default is zero, which means the producer - // doesn't care about the number of buffers in the pool. In that case - // mDefaultMaxBufferCount is used as the limit. - int mOverrideMaxBufferCount; - - // mGraphicBufferAlloc is the connection to SurfaceFlinger that is used to - // allocate new GraphicBuffer objects. - sp<IGraphicBufferAlloc> mGraphicBufferAlloc; - - // mConsumerListener is used to notify the connected consumer of - // asynchronous events that it may wish to react to. It is initially set - // to NULL and is written by consumerConnect and consumerDisconnect. - sp<ConsumerListener> mConsumerListener; - - // mSynchronousMode whether we're in synchronous mode or not - bool mSynchronousMode; - - // mAllowSynchronousMode whether we allow synchronous mode or not. Set - // when the GonkBufferQueue is created (by the consumer). - const bool mAllowSynchronousMode; - - // mConnectedApi indicates the producer API that is currently connected - // to this GonkBufferQueue. It defaults to NO_CONNECTED_API (= 0), and gets - // updated by the connect and disconnect methods. - int mConnectedApi; - - // mDequeueCondition condition used for dequeueBuffer in synchronous mode - mutable Condition mDequeueCondition; - - // mQueue is a FIFO of queued buffers used in synchronous mode - typedef Vector<int> Fifo; - Fifo mQueue; - - // mAbandoned indicates that the GonkBufferQueue will no longer be used to - // consume image buffers pushed to it using the IGraphicBufferProducer - // interface. It is initialized to false, and set to true in the - // consumerDisconnect method. A GonkBufferQueue that has been abandoned will - // return the NO_INIT error from all IGraphicBufferProducer methods - // capable of returning an error. - bool mAbandoned; - - // mConsumerName is a string used to identify the GonkBufferQueue in log - // messages. It is set by the setConsumerName method. - String8 mConsumerName; - - // mMutex is the mutex used to prevent concurrent access to the member - // variables of GonkBufferQueue objects. It must be locked whenever the - // member variables are accessed. - mutable Mutex mMutex; - - // mFrameCounter is the free running counter, incremented on every - // successful queueBuffer call. - uint64_t mFrameCounter; - - // mBufferHasBeenQueued is true once a buffer has been queued. It is - // reset when something causes all buffers to be freed (e.g. changing the - // buffer count). - bool mBufferHasBeenQueued; - - // mDefaultBufferFormat can be set so it will override - // the buffer format when it isn't specified in dequeueBuffer - uint32_t mDefaultBufferFormat; - - // mConsumerUsageBits contains flags the consumer wants for GraphicBuffers - uint32_t mConsumerUsageBits; - - // mTransformHint is used to optimize for screen rotations - uint32_t mTransformHint; - -}; - -// ---------------------------------------------------------------------------- -}; // namespace android - -#endif // ANDROID_GUI_BUFFERQUEUE_H |