--- /dev/null
+/*
+ * Copyright 2014 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_BUFFERITEM_H
+#define ANDROID_GUI_BUFFERITEM_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <gui/IGraphicBufferConsumer.h>
+
+#include <ui/Rect.h>
+
+#include <utils/Flattenable.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+class Fence;
+class GraphicBuffer;
+
+class BufferItem : public Flattenable<BufferItem> {
+ friend class Flattenable<BufferItem>;
+ size_t getPodSize() const;
+ 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);
+
+ public:
+ // The default value of mBuf, used to indicate this doesn't correspond to a slot.
+ enum { INVALID_BUFFER_SLOT = -1 };
+ BufferItem();
+ operator IGraphicBufferConsumer::BufferItem() const;
+
+ static const char* scalingModeName(uint32_t scalingMode);
+
+ // 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;
+
+ // mFence is a fence that will signal when the buffer is idle.
+ sp<Fence> mFence;
+
+ // mCrop is the current crop rectangle for this buffer slot.
+ Rect mCrop;
+
+ // mTransform is the current transform flags for this buffer slot.
+ // refer to NATIVE_WINDOW_TRANSFORM_* in <window.h>
+ uint32_t mTransform;
+
+ // mScalingMode is the current scaling mode for this buffer slot.
+ // refer to NATIVE_WINDOW_SCALING_* in <window.h>
+ uint32_t mScalingMode;
+
+ // mTimestamp is the current timestamp for this buffer slot. This gets
+ // to set by queueBuffer each time this slot is queued. This value
+ // is guaranteed to be monotonically increasing for each newly
+ // acquired buffer.
+ int64_t mTimestamp;
+
+ // mIsAutoTimestamp indicates whether mTimestamp was generated
+ // automatically when the buffer was queued.
+ bool mIsAutoTimestamp;
+
+ // mFrameNumber is the number of the queued frame for this slot.
+ uint64_t mFrameNumber;
+
+ // mSlot is the slot index of this buffer (default INVALID_BUFFER_SLOT).
+ int mSlot;
+
+ // mIsDroppable whether this buffer was queued with the
+ // property that it can be replaced by a new buffer for the purpose of
+ // making sure dequeueBuffer() won't block.
+ // i.e.: was the BufferQueue in "mDequeueBufferCannotBlock" when this buffer
+ // was queued.
+ bool mIsDroppable;
+
+ // Indicates whether this buffer has been seen by a consumer yet
+ bool mAcquireCalled;
+
+ // Indicates this buffer must be transformed by the inverse transform of the screen
+ // it is displayed onto. This is applied after mTransform.
+ bool mTransformToDisplayInverse;
+};
+
+} // namespace android
+
+#endif
--- /dev/null
+/*
+ * Copyright 2014 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_BUFFERQUEUECONSUMER_H
+#define ANDROID_GUI_BUFFERQUEUECONSUMER_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <gui/BufferQueueCore.h>
+#include <gui/IGraphicBufferConsumer.h>
+
+namespace android {
+
+class BufferQueueCore;
+
+class BufferQueueConsumer : public BnGraphicBufferConsumer {
+
+public:
+ BufferQueueConsumer(const sp<BufferQueueCore>& core);
+ virtual ~BufferQueueConsumer();
+
+ // acquireBuffer attempts to acquire ownership of the next pending buffer in
+ // the BufferQueue. If no buffer is pending then it returns
+ // NO_BUFFER_AVAILABLE. 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.
+ //
+ // If expectedPresent is nonzero, it indicates the time when the buffer
+ // will be displayed on screen. If the buffer's timestamp is farther in the
+ // future, the buffer won't be acquired, and PRESENT_LATER will be
+ // returned. The presentation time is in nanoseconds, and the time base
+ // is CLOCK_MONOTONIC.
+ virtual status_t acquireBuffer(BufferItem* outBuffer,
+ nsecs_t expectedPresent);
+
+ // releaseBuffer releases a buffer slot from the consumer back to the
+ // BufferQueue. 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. frameNumber is used to indentify the exact buffer returned.
+ //
+ // 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.
+ virtual status_t releaseBuffer(int slot, uint64_t frameNumber,
+ const sp<Fence>& releaseFence, EGLDisplay display,
+ EGLSyncKHR fence);
+
+ // connect connects a consumer to the BufferQueue. Only one
+ // consumer may be connected, and when that consumer disconnects the
+ // BufferQueue is placed into the "abandoned" state, causing most
+ // interactions with the BufferQueue by the producer to fail.
+ // controlledByApp indicates whether the consumer is controlled by
+ // the application.
+ //
+ // consumerListener may not be NULL.
+ virtual status_t connect(const sp<IConsumerListener>& consumerListener,
+ bool controlledByApp);
+
+ // disconnect disconnects a consumer from the BufferQueue. All
+ // buffers will be freed and the BufferQueue is placed in the "abandoned"
+ // state, causing most interactions with the BufferQueue by the producer to
+ // fail.
+ virtual status_t disconnect();
+
+ // getReleasedBuffers sets the value pointed to by outSlotMask to a bit mask
+ // indicating which buffer slots have been released by the BufferQueue
+ // but have not yet been released by the consumer.
+ //
+ // This should be called from the onBuffersReleased() callback.
+ virtual status_t getReleasedBuffers(uint32_t* outSlotMask);
+
+ // setDefaultBufferSize is used to set the size of buffers returned by
+ // dequeueBuffer when a width and height of zero is requested. Default
+ // is 1x1.
+ virtual status_t setDefaultBufferSize(uint32_t width, uint32_t height);
+
+ // 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.
+ virtual status_t setDefaultMaxBufferCount(int bufferCount);
+
+ // disableAsyncBuffer disables the extra buffer used in async mode
+ // (when both producer and consumer have set their "isControlledByApp"
+ // flag) and has dequeueBuffer() return WOULD_BLOCK instead.
+ //
+ // This can only be called before connect().
+ virtual status_t disableAsyncBuffer();
+
+ // 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 BufferQueue.
+ virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers);
+
+ // setConsumerName sets the name used in logging
+ virtual void setConsumerName(const String8& name);
+
+ // setDefaultBufferFormat allows the BufferQueue 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.
+ virtual 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.
+ virtual 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).
+ virtual status_t setTransformHint(uint32_t hint);
+
+ // dump our state in a String
+ virtual void dump(String8& result, const char* prefix) const;
+
+private:
+ sp<BufferQueueCore> mCore;
+ BufferQueueCore::SlotsType& mSlots;
+ String8 mConsumerName; // Cached from mCore. Updated on setConsumerName.
+
+}; // class BufferQueueConsumer
+
+} // namespace android
+
+#endif
--- /dev/null
+/*
+ * Copyright 2014 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_BUFFERQUEUECORE_H
+#define ANDROID_GUI_BUFFERQUEUECORE_H
+
+#include <gui/BufferSlot.h>
+
+#include <utils/Condition.h>
+#include <utils/Mutex.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <utils/StrongPointer.h>
+#include <utils/Trace.h>
+#include <utils/Vector.h>
+
+#define BQ_LOGV(x, ...) ALOGV("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define BQ_LOGD(x, ...) ALOGD("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define BQ_LOGI(x, ...) ALOGI("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define BQ_LOGW(x, ...) ALOGW("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define BQ_LOGE(x, ...) ALOGE("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+
+#define ATRACE_BUFFER_INDEX(index) \
+ if (ATRACE_ENABLED()) { \
+ char ___traceBuf[1024]; \
+ snprintf(___traceBuf, 1024, "%s: %d", \
+ mCore->mConsumerName.string(), (index)); \
+ android::ScopedTrace ___bufTracer(ATRACE_TAG, ___traceBuf); \
+ }
+
+namespace android {
+
+class BufferItem;
+class IBinder;
+class IConsumerListener;
+class IGraphicBufferAlloc;
+
+class BufferQueueCore : public virtual RefBase {
+
+ friend class BufferQueueProducer;
+ friend class BufferQueueConsumer;
+
+public:
+ // BufferQueue will keep track of at most this value of buffers. Attempts
+ // at runtime to increase the number of buffers past this will fail.
+ enum { NUM_BUFFER_SLOTS = 32 };
+
+ // Used as a placeholder slot number when the value isn't pointing to an
+ // existing buffer.
+ enum { INVALID_BUFFER_SLOT = -1 }; // TODO: Extract from IGBC::BufferItem
+
+ // 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 };
+
+ // The default API number used to indicate that no producer is connected
+ enum { NO_CONNECTED_API = 0 };
+
+ typedef BufferSlot SlotsType[NUM_BUFFER_SLOTS];
+ typedef Vector<BufferItem> Fifo;
+
+ // BufferQueueCore manages a pool of gralloc memory slots to be used by
+ // producers and consumers. allocator is used to allocate all the needed
+ // gralloc buffers.
+ BufferQueueCore(const sp<IGraphicBufferAlloc>& allocator = NULL);
+ virtual ~BufferQueueCore();
+
+private:
+ void dump(String8& result, const char* prefix) const;
+
+ int getMinUndequeuedBufferCountLocked(bool async) const;
+ int getMinMaxBufferCountLocked(bool async) const;
+ int getMaxBufferCountLocked(bool async) const;
+ status_t setDefaultMaxBufferCountLocked(int count);
+ void freeBufferLocked(int slot);
+ void freeAllBuffersLocked();
+ bool stillTracking(const BufferItem* item) const;
+
+ const sp<IGraphicBufferAlloc>& mAllocator;
+ mutable Mutex mMutex;
+ bool mIsAbandoned;
+ bool mConsumerControlledByApp;
+ String8 mConsumerName;
+ sp<IConsumerListener> mConsumerListener;
+ uint32_t mConsumerUsageBits;
+ int mConnectedApi;
+ sp<IBinder> mConnectedProducerToken;
+ BufferSlot mSlots[NUM_BUFFER_SLOTS];
+ Fifo mQueue;
+ int mOverrideMaxBufferCount;
+ mutable Condition mDequeueCondition;
+ bool mUseAsyncBuffer;
+ bool mDequeueBufferCannotBlock;
+ uint32_t mDefaultBufferFormat;
+ int mDefaultWidth;
+ int mDefaultHeight;
+ int mDefaultMaxBufferCount;
+ int mMaxAcquiredBufferCount;
+ bool mBufferHasBeenQueued;
+ uint64_t mFrameCounter;
+ uint32_t mTransformHint;
+
+}; // class BufferQueueCore
+
+} // namespace android
+
+#endif
--- /dev/null
+/*
+ * Copyright 2014 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_BUFFERQUEUEPRODUCER_H
+#define ANDROID_GUI_BUFFERQUEUEPRODUCER_H
+
+#include <gui/BufferQueueCore.h>
+#include <gui/IGraphicBufferProducer.h>
+
+namespace android {
+
+class BufferSlot;
+
+class BufferQueueProducer : public BnGraphicBufferProducer,
+ private IBinder::DeathRecipient {
+
+public:
+ BufferQueueProducer(const sp<BufferQueueCore>& core);
+ virtual ~BufferQueueProducer();
+
+ // 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);
+
+ // setBufferCount updates the number of available buffer slots. If this
+ // method succeeds, buffer slots will be both unallocated and owned by
+ // the BufferQueue 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 (exclusive) 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);
+
+ // 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 outFence 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.
+ virtual status_t dequeueBuffer(int *outSlot, sp<Fence>* outFence, bool async,
+ uint32_t width, uint32_t height, uint32_t format, uint32_t usage);
+
+ // queueBuffer returns a filled buffer to the BufferQueue.
+ //
+ // 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 slot,
+ const QueueBufferInput& input, QueueBufferOutput* output);
+
+ // cancelBuffer returns a dequeued buffer to the BufferQueue, 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.
+ virtual void cancelBuffer(int slot, const sp<Fence>& fence);
+
+ // Query native window attributes. The "what" values are enumerated in
+ // window.h (e.g. NATIVE_WINDOW_FORMAT).
+ virtual int query(int what, int* outValue);
+
+ // connect attempts to connect a producer API to the BufferQueue. 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
+ // BufferQueue 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(const sp<IBinder>& token,
+ int api, bool producerControlledByApp, QueueBufferOutput* output);
+
+ // disconnect attempts to disconnect a producer API from the BufferQueue.
+ // 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 BufferQueue is not currently
+ // connected to the specified producer API.
+ virtual status_t disconnect(int api);
+
+private:
+ // This is required by the IBinder::DeathRecipient interface
+ virtual void binderDied(const wp<IBinder>& who);
+
+ sp<BufferQueueCore> mCore;
+ BufferQueueCore::SlotsType& mSlots;
+
+ // This is a cached copy of the name stored in the BufferQueueCore.
+ // It's updated during connect and dequeueBuffer (which should catch
+ // most updates).
+ String8 mConsumerName;
+
+}; // class BufferQueueProducer
+
+} // namespace android
+
+#endif
--- /dev/null
+/*
+ * Copyright 2014 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_BUFFERSLOT_H
+#define ANDROID_GUI_BUFFERSLOT_H
+
+#include <ui/Fence.h>
+#include <ui/GraphicBuffer.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+class Fence;
+
+struct BufferSlot {
+
+ BufferSlot()
+ : mEglDisplay(EGL_NO_DISPLAY),
+ mBufferState(BufferSlot::FREE),
+ mRequestBufferCalled(false),
+ mFrameNumber(0),
+ mEglFence(EGL_NO_SYNC_KHR),
+ mAcquireCalled(false),
+ mNeedsCleanupOnRelease(false) {
+ }
+
+ // mGraphicBuffer points to the buffer allocated for this slot or is NULL
+ // if no buffer has been allocated.
+ sp<GraphicBuffer> mGraphicBuffer;
+
+ // mEglDisplay is the EGLDisplay used to create EGLSyncKHR objects.
+ EGLDisplay mEglDisplay;
+
+ // 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 BufferQueue. 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 BufferQueue. 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
+ };
+
+ static const char* bufferStateName(BufferState state);
+
+ // 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;
+
+ // 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;
+};
+
+} // namespace android
+
+#endif
IGraphicBufferConsumer.cpp \
IConsumerListener.cpp \
BitTube.cpp \
+ BufferItem.cpp \
BufferItemConsumer.cpp \
BufferQueue.cpp \
+ BufferQueueConsumer.cpp \
+ BufferQueueCore.cpp \
+ BufferQueueProducer.cpp \
+ BufferSlot.cpp \
ConsumerBase.cpp \
CpuConsumer.cpp \
DisplayEventReceiver.cpp \
--- /dev/null
+/*
+ * Copyright 2014 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/BufferItem.h>
+
+#include <ui/Fence.h>
+#include <ui/GraphicBuffer.h>
+
+#include <system/window.h>
+
+namespace android {
+
+BufferItem::BufferItem() :
+ mTransform(0),
+ mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
+ mTimestamp(0),
+ mIsAutoTimestamp(false),
+ mFrameNumber(0),
+ mSlot(INVALID_BUFFER_SLOT),
+ mIsDroppable(false),
+ mAcquireCalled(false),
+ mTransformToDisplayInverse(false) {
+ mCrop.makeInvalid();
+}
+
+BufferItem::operator IGraphicBufferConsumer::BufferItem() const {
+ IGraphicBufferConsumer::BufferItem bufferItem;
+ bufferItem.mTransform = mTransform;
+ bufferItem.mScalingMode = mScalingMode;
+ bufferItem.mTimestamp = mTimestamp;
+ bufferItem.mIsAutoTimestamp = mIsAutoTimestamp;
+ bufferItem.mFrameNumber = mFrameNumber;
+ bufferItem.mBuf = mSlot;
+ bufferItem.mIsDroppable = mIsDroppable;
+ bufferItem.mAcquireCalled = mAcquireCalled;
+ bufferItem.mTransformToDisplayInverse = mTransformToDisplayInverse;
+ bufferItem.mCrop = mCrop;
+ return bufferItem;
+}
+
+size_t BufferItem::getPodSize() const {
+ size_t c = sizeof(mCrop) +
+ sizeof(mTransform) +
+ sizeof(mScalingMode) +
+ sizeof(mTimestamp) +
+ sizeof(mIsAutoTimestamp) +
+ sizeof(mFrameNumber) +
+ sizeof(mSlot) +
+ sizeof(mIsDroppable) +
+ sizeof(mAcquireCalled) +
+ sizeof(mTransformToDisplayInverse);
+ return c;
+}
+
+size_t BufferItem::getFlattenedSize() const {
+ size_t c = 0;
+ if (mGraphicBuffer != 0) {
+ c += mGraphicBuffer->getFlattenedSize();
+ FlattenableUtils::align<4>(c);
+ }
+ if (mFence != 0) {
+ c += mFence->getFlattenedSize();
+ FlattenableUtils::align<4>(c);
+ }
+ return sizeof(int32_t) + c + getPodSize();
+}
+
+size_t BufferItem::getFdCount() const {
+ size_t c = 0;
+ if (mGraphicBuffer != 0) {
+ c += mGraphicBuffer->getFdCount();
+ }
+ if (mFence != 0) {
+ c += mFence->getFdCount();
+ }
+ return c;
+}
+
+status_t BufferItem::flatten(
+ void*& buffer, size_t& size, int*& fds, size_t& count) const {
+
+ // make sure we have enough space
+ if (count < BufferItem::getFlattenedSize()) {
+ return NO_MEMORY;
+ }
+
+ // content flags are stored first
+ uint32_t& flags = *static_cast<uint32_t*>(buffer);
+
+ // advance the pointer
+ FlattenableUtils::advance(buffer, size, sizeof(uint32_t));
+
+ flags = 0;
+ if (mGraphicBuffer != 0) {
+ status_t err = mGraphicBuffer->flatten(buffer, size, fds, count);
+ if (err) return err;
+ size -= FlattenableUtils::align<4>(buffer);
+ flags |= 1;
+ }
+ if (mFence != 0) {
+ status_t err = mFence->flatten(buffer, size, fds, count);
+ if (err) return err;
+ size -= FlattenableUtils::align<4>(buffer);
+ flags |= 2;
+ }
+
+ // check we have enough space (in case flattening the fence/graphicbuffer lied to us)
+ if (size < getPodSize()) {
+ return NO_MEMORY;
+ }
+
+ FlattenableUtils::write(buffer, size, mCrop);
+ FlattenableUtils::write(buffer, size, mTransform);
+ FlattenableUtils::write(buffer, size, mScalingMode);
+ FlattenableUtils::write(buffer, size, mTimestamp);
+ FlattenableUtils::write(buffer, size, mIsAutoTimestamp);
+ FlattenableUtils::write(buffer, size, mFrameNumber);
+ FlattenableUtils::write(buffer, size, mSlot);
+ FlattenableUtils::write(buffer, size, mIsDroppable);
+ FlattenableUtils::write(buffer, size, mAcquireCalled);
+ FlattenableUtils::write(buffer, size, mTransformToDisplayInverse);
+
+ return NO_ERROR;
+}
+
+status_t BufferItem::unflatten(
+ void const*& buffer, size_t& size, int const*& fds, size_t& count) {
+
+ if (size < sizeof(uint32_t))
+ return NO_MEMORY;
+
+ uint32_t flags = 0;
+ FlattenableUtils::read(buffer, size, flags);
+
+ if (flags & 1) {
+ mGraphicBuffer = new GraphicBuffer();
+ status_t err = mGraphicBuffer->unflatten(buffer, size, fds, count);
+ if (err) return err;
+ size -= FlattenableUtils::align<4>(buffer);
+ }
+
+ if (flags & 2) {
+ mFence = new Fence();
+ status_t err = mFence->unflatten(buffer, size, fds, count);
+ if (err) return err;
+ size -= FlattenableUtils::align<4>(buffer);
+ }
+
+ // check we have enough space
+ if (size < getPodSize()) {
+ return NO_MEMORY;
+ }
+
+ FlattenableUtils::read(buffer, size, mCrop);
+ FlattenableUtils::read(buffer, size, mTransform);
+ FlattenableUtils::read(buffer, size, mScalingMode);
+ FlattenableUtils::read(buffer, size, mTimestamp);
+ FlattenableUtils::read(buffer, size, mIsAutoTimestamp);
+ FlattenableUtils::read(buffer, size, mFrameNumber);
+ FlattenableUtils::read(buffer, size, mSlot);
+ FlattenableUtils::read(buffer, size, mIsDroppable);
+ FlattenableUtils::read(buffer, size, mAcquireCalled);
+ FlattenableUtils::read(buffer, size, mTransformToDisplayInverse);
+
+ return NO_ERROR;
+}
+
+const char* BufferItem::scalingModeName(uint32_t scalingMode) {
+ switch (scalingMode) {
+ case NATIVE_WINDOW_SCALING_MODE_FREEZE: return "FREEZE";
+ case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: return "SCALE_TO_WINDOW";
+ case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP: return "SCALE_CROP";
+ default: return "Unknown";
+ }
+}
+
+} // namespace android
--- /dev/null
+/*
+ * Copyright 2014 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/BufferItem.h>
+#include <gui/BufferQueueConsumer.h>
+#include <gui/BufferQueueCore.h>
+#include <gui/IConsumerListener.h>
+
+namespace android {
+
+BufferQueueConsumer::BufferQueueConsumer(const sp<BufferQueueCore>& core) :
+ mCore(core),
+ mSlots(core->mSlots),
+ mConsumerName() {}
+
+BufferQueueConsumer::~BufferQueueConsumer() {}
+
+status_t BufferQueueConsumer::acquireBuffer(BufferItem* outBuffer,
+ nsecs_t expectedPresent) {
+ ATRACE_CALL();
+ Mutex::Autolock lock(mCore->mMutex);
+
+ // Check that the consumer doesn't currently have the maximum number of
+ // buffers acquired. We allow the max buffer count to be exceeded by one
+ // buffer so that the consumer can successfully set up the newly acquired
+ // buffer before releasing the old one.
+ int numAcquiredBuffers = 0;
+ for (int s = 0; s < BufferQueueCore::NUM_BUFFER_SLOTS; ++s) {
+ if (mSlots[s].mBufferState == BufferSlot::ACQUIRED) {
+ ++numAcquiredBuffers;
+ }
+ }
+ if (numAcquiredBuffers >= mCore->mMaxAcquiredBufferCount + 1) {
+ BQ_LOGE("acquireBuffer: max acquired buffer count reached: %d (max %d)",
+ numAcquiredBuffers, mCore->mMaxAcquiredBufferCount);
+ return INVALID_OPERATION;
+ }
+
+ // Check if the queue is empty.
+ // In asynchronous mode the list is guaranteed to be one buffer deep,
+ // while in synchronous mode we use the oldest buffer.
+ if (mCore->mQueue.empty()) {
+ return NO_BUFFER_AVAILABLE;
+ }
+
+ BufferQueueCore::Fifo::iterator front(mCore->mQueue.begin());
+
+ // If expectedPresent is specified, we may not want to return a buffer yet.
+ // If it's specified and there's more than one buffer queued, we may want
+ // to drop a buffer.
+ if (expectedPresent != 0) {
+ const int MAX_REASONABLE_NSEC = 1000000000ULL; // 1 second
+
+ // The 'expectedPresent' argument indicates when the buffer is expected
+ // to be presented on-screen. If the buffer's desired present time is
+ // earlier (less) than expectedPresent -- meaning it will be displayed
+ // on time or possibly late if we show it as soon as possible -- we
+ // acquire and return it. If we don't want to display it until after the
+ // expectedPresent time, we return PRESENT_LATER without acquiring it.
+ //
+ // To be safe, we don't defer acquisition if expectedPresent is more
+ // than one second in the future beyond the desired present time
+ // (i.e., we'd be holding the buffer for a long time).
+ //
+ // NOTE: Code assumes monotonic time values from the system clock
+ // are positive.
+
+ // Start by checking to see if we can drop frames. We skip this check if
+ // the timestamps are being auto-generated by Surface. If the app isn't
+ // generating timestamps explicitly, it probably doesn't want frames to
+ // be discarded based on them.
+ while (mCore->mQueue.size() > 1 && !mCore->mQueue[0].mIsAutoTimestamp) {
+ // If entry[1] is timely, drop entry[0] (and repeat). We apply an
+ // additional criterion here: we only drop the earlier buffer if our
+ // desiredPresent falls within +/- 1 second of the expected present.
+ // Otherwise, bogus desiredPresent times (e.g., 0 or a small
+ // relative timestamp), which normally mean "ignore the timestamp
+ // and acquire immediately", would cause us to drop frames.
+ //
+ // We may want to add an additional criterion: don't drop the
+ // earlier buffer if entry[1]'s fence hasn't signaled yet.
+ const BufferItem& bufferItem(mCore->mQueue[1]);
+ nsecs_t desiredPresent = bufferItem.mTimestamp;
+ if (desiredPresent < expectedPresent - MAX_REASONABLE_NSEC ||
+ desiredPresent > expectedPresent) {
+ // This buffer is set to display in the near future, or
+ // desiredPresent is garbage. Either way we don't want to drop
+ // the previous buffer just to get this on the screen sooner.
+ BQ_LOGV("acquireBuffer: nodrop desire=%lld expect=%lld "
+ "(%lld) now=%lld", desiredPresent, expectedPresent,
+ desiredPresent - expectedPresent,
+ systemTime(CLOCK_MONOTONIC));
+ break;
+ }
+
+ BQ_LOGV("acquireBuffer: drop desire=%lld expect=%lld size=%d",
+ desiredPresent, expectedPresent, mCore->mQueue.size());
+ if (mCore->stillTracking(front)) {
+ // Front buffer is still in mSlots, so mark the slot as free
+ mSlots[front->mSlot].mBufferState = BufferSlot::FREE;
+ }
+ mCore->mQueue.erase(front);
+ front = mCore->mQueue.begin();
+ }
+
+ // See if the front buffer is due
+ nsecs_t desiredPresent = front->mTimestamp;
+ if (desiredPresent > expectedPresent &&
+ desiredPresent < expectedPresent + MAX_REASONABLE_NSEC) {
+ BQ_LOGV("acquireBuffer: defer desire=%lld expect=%lld "
+ "(%lld) now=%lld", desiredPresent, expectedPresent,
+ desiredPresent - expectedPresent,
+ systemTime(CLOCK_MONOTONIC));
+ return PRESENT_LATER;
+ }
+
+ BQ_LOGV("acquireBuffer: accept desire=%lld expect=%lld "
+ "(%lld) now=%lld", desiredPresent, expectedPresent,
+ desiredPresent - expectedPresent,
+ systemTime(CLOCK_MONOTONIC));
+ }
+
+ int slot = front->mSlot;
+ *outBuffer = *front;
+ ATRACE_BUFFER_INDEX(slot);
+
+ BQ_LOGV("acquireBuffer: acquiring { slot=%d/%llu buffer=%p }",
+ slot, front->mFrameNumber, front->mGraphicBuffer->handle);
+ // If the front buffer is still being tracked, update its slot state
+ if (mCore->stillTracking(front)) {
+ mSlots[slot].mAcquireCalled = true;
+ mSlots[slot].mNeedsCleanupOnRelease = false;
+ mSlots[slot].mBufferState = BufferSlot::ACQUIRED;
+ mSlots[slot].mFence = Fence::NO_FENCE;
+ }
+
+ // If the buffer has previously been acquired by the consumer, set
+ // mGraphicBuffer to NULL to avoid unnecessarily remapping this buffer
+ // on the consumer side
+ if (outBuffer->mAcquireCalled) {
+ outBuffer->mGraphicBuffer = NULL;
+ }
+
+ mCore->mQueue.erase(front);
+ // TODO: Should this call be after we free a slot while dropping buffers?
+ // Simply acquiring the next buffer doesn't enable a producer to dequeue.
+ mCore->mDequeueCondition.broadcast();
+
+ ATRACE_INT(mCore->mConsumerName.string(), mCore->mQueue.size());
+
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::releaseBuffer(int slot, uint64_t frameNumber,
+ const sp<Fence>& releaseFence, EGLDisplay eglDisplay,
+ EGLSyncKHR eglFence) {
+ ATRACE_CALL();
+ ATRACE_BUFFER_INDEX(slot);
+
+ if (slot == BufferQueueCore::INVALID_BUFFER_SLOT || releaseFence == NULL) {
+ return BAD_VALUE;
+ }
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ // If the frame number has changed because the buffer has been reallocated,
+ // we can ignore this releaseBuffer for the old buffer
+ if (frameNumber != mSlots[slot].mFrameNumber) {
+ return STALE_BUFFER_SLOT;
+ }
+
+ // Make sure this buffer hasn't been queued while acquired by the consumer
+ BufferQueueCore::Fifo::iterator current(mCore->mQueue.begin());
+ while (current != mCore->mQueue.end()) {
+ if (current->mSlot == slot) {
+ BQ_LOGE("releaseBuffer: buffer slot %d pending release is "
+ "currently queued", slot);
+ return -EINVAL;
+ }
+ ++current;
+ }
+
+ if (mSlots[slot].mBufferState == BufferSlot::ACQUIRED) {
+ mSlots[slot].mEglDisplay = eglDisplay;
+ mSlots[slot].mEglFence = eglFence;
+ mSlots[slot].mFence = releaseFence;
+ mSlots[slot].mBufferState = BufferSlot::FREE;
+ } else if (mSlots[slot].mNeedsCleanupOnRelease) {
+ BQ_LOGV("releaseBuffer: releasing a stale buffer slot %d "
+ "(state = %d)", slot, mSlots[slot].mBufferState);
+ mSlots[slot].mNeedsCleanupOnRelease = false;
+ return STALE_BUFFER_SLOT;
+ } else {
+ BQ_LOGV("releaseBuffer: attempted to release buffer slot %d "
+ "but its state was %d", slot, mSlots[slot].mBufferState);
+ return -EINVAL;
+ }
+
+ mCore->mDequeueCondition.broadcast();
+
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::connect(
+ const sp<IConsumerListener>& consumerListener, bool controlledByApp) {
+ ATRACE_CALL();
+
+ if (consumerListener == NULL) {
+ BQ_LOGE("connect(C): consumerListener may not be NULL");
+ return BAD_VALUE;
+ }
+
+ BQ_LOGV("connect(C): controlledByApp=%s",
+ controlledByApp ? "true" : "false");
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("connect(C): BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ mCore->mConsumerListener = consumerListener;
+ mCore->mConsumerControlledByApp = controlledByApp;
+
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::disconnect() {
+ ATRACE_CALL();
+
+ BQ_LOGV("disconnect(C)");
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mConsumerListener == NULL) {
+ BQ_LOGE("disconnect(C): no consumer is connected");
+ return -EINVAL;
+ }
+
+ mCore->mIsAbandoned = true;
+ mCore->mConsumerListener = NULL;
+ mCore->mQueue.clear();
+ mCore->freeAllBuffersLocked();
+ mCore->mDequeueCondition.broadcast();
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::getReleasedBuffers(uint32_t *outSlotMask) {
+ ATRACE_CALL();
+
+ if (outSlotMask == NULL) {
+ BQ_LOGE("getReleasedBuffers: outSlotMask may not be NULL");
+ return BAD_VALUE;
+ }
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("getReleasedBuffers: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ uint32_t mask = 0;
+ for (int s = 0; s < BufferQueueCore::NUM_BUFFER_SLOTS; ++s) {
+ if (!mSlots[s].mAcquireCalled) {
+ mask |= (1u << s);
+ }
+ }
+
+ // Remove from the mask queued buffers for which acquire has been called,
+ // since the consumer will not receive their buffer addresses and so must
+ // retain their cached information
+ BufferQueueCore::Fifo::iterator current(mCore->mQueue.begin());
+ while (current != mCore->mQueue.end()) {
+ if (current->mAcquireCalled) {
+ mask &= ~(1u << current->mSlot);
+ }
+ ++current;
+ }
+
+ BQ_LOGV("getReleasedBuffers: returning mask %#x", mask);
+ *outSlotMask = mask;
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::setDefaultBufferSize(uint32_t width,
+ uint32_t height) {
+ ATRACE_CALL();
+
+ if (width == 0 || height == 0) {
+ BQ_LOGV("setDefaultBufferSize: dimensions cannot be 0 (width=%u "
+ "height=%u)", width, height);
+ return BAD_VALUE;
+ }
+
+ BQ_LOGV("setDefaultBufferSize: width=%u height=%u", width, height);
+
+ Mutex::Autolock lock(mCore->mMutex);
+ mCore->mDefaultWidth = width;
+ mCore->mDefaultHeight = height;
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::setDefaultMaxBufferCount(int bufferCount) {
+ ATRACE_CALL();
+ Mutex::Autolock lock(mCore->mMutex);
+ return mCore->setDefaultMaxBufferCountLocked(bufferCount);
+}
+
+status_t BufferQueueConsumer::disableAsyncBuffer() {
+ ATRACE_CALL();
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mConsumerListener != NULL) {
+ BQ_LOGE("disableAsyncBuffer: consumer already connected");
+ return INVALID_OPERATION;
+ }
+
+ BQ_LOGV("disableAsyncBuffer");
+ mCore->mUseAsyncBuffer = false;
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::setMaxAcquiredBufferCount(
+ int maxAcquiredBuffers) {
+ ATRACE_CALL();
+
+ if (maxAcquiredBuffers < 1 ||
+ maxAcquiredBuffers > BufferQueueCore::MAX_MAX_ACQUIRED_BUFFERS) {
+ BQ_LOGE("setMaxAcquiredBufferCount: invalid count %d",
+ maxAcquiredBuffers);
+ return BAD_VALUE;
+ }
+
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mConnectedApi != BufferQueueCore::NO_CONNECTED_API) {
+ BQ_LOGE("setMaxAcquiredBufferCount: producer is already connected");
+ return INVALID_OPERATION;
+ }
+
+ BQ_LOGV("setMaxAcquiredBufferCount: %d", maxAcquiredBuffers);
+ mCore->mMaxAcquiredBufferCount = maxAcquiredBuffers;
+ return NO_ERROR;
+}
+
+void BufferQueueConsumer::setConsumerName(const String8& name) {
+ ATRACE_CALL();
+ BQ_LOGV("setConsumerName: '%s'", name.string());
+ Mutex::Autolock lock(mCore->mMutex);
+ mCore->mConsumerName = name;
+ mConsumerName = name;
+}
+
+status_t BufferQueueConsumer::setDefaultBufferFormat(uint32_t defaultFormat) {
+ ATRACE_CALL();
+ BQ_LOGV("setDefaultBufferFormat: %u", defaultFormat);
+ Mutex::Autolock lock(mCore->mMutex);
+ mCore->mDefaultBufferFormat = defaultFormat;
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::setConsumerUsageBits(uint32_t usage) {
+ ATRACE_CALL();
+ BQ_LOGV("setConsumerUsageBits: %#x", usage);
+ Mutex::Autolock lock(mCore->mMutex);
+ mCore->mConsumerUsageBits = usage;
+ return NO_ERROR;
+}
+
+status_t BufferQueueConsumer::setTransformHint(uint32_t hint) {
+ ATRACE_CALL();
+ BQ_LOGV("setTransformHint: %#x", hint);
+ Mutex::Autolock lock(mCore->mMutex);
+ mCore->mTransformHint = hint;
+ return NO_ERROR;
+}
+
+void BufferQueueConsumer::dump(String8& result, const char* prefix) const {
+ mCore->dump(result, prefix);
+}
+
+} // namespace android
--- /dev/null
+/*
+ * Copyright 2014 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.
+ */
+
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <gui/BufferItem.h>
+#include <gui/BufferQueueCore.h>
+#include <gui/IConsumerListener.h>
+
+template <typename T>
+static inline T max(T a, T b) { return a > b ? a : b; }
+
+namespace android {
+
+static String8 getUniqueName() {
+ static volatile int32_t counter = 0;
+ return String8::format("unnamed-%d-%d", getpid(),
+ android_atomic_inc(&counter));
+}
+
+BufferQueueCore::BufferQueueCore(const sp<IGraphicBufferAlloc>& allocator) :
+ mAllocator(allocator),
+ mMutex(),
+ mIsAbandoned(false),
+ mConsumerControlledByApp(false),
+ mConsumerName(getUniqueName()),
+ mConsumerListener(),
+ mConsumerUsageBits(0),
+ mConnectedApi(NO_CONNECTED_API),
+ mConnectedProducerToken(),
+ mSlots(),
+ mQueue(),
+ mOverrideMaxBufferCount(0),
+ mDequeueCondition(),
+ mUseAsyncBuffer(true),
+ mDequeueBufferCannotBlock(false),
+ mDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888),
+ mDefaultWidth(1),
+ mDefaultHeight(1),
+ mDefaultMaxBufferCount(2),
+ mMaxAcquiredBufferCount(1),
+ mBufferHasBeenQueued(false),
+ mFrameCounter(0),
+ mTransformHint(0) {}
+
+BufferQueueCore::~BufferQueueCore() {}
+
+void BufferQueueCore::dump(String8& result, const char* prefix) const {
+ Mutex::Autolock lock(mMutex);
+
+ String8 fifo;
+ Fifo::const_iterator current(mQueue.begin());
+ while (current != mQueue.end()) {
+ fifo.appendFormat("%02d:%p crop=[%d,%d,%d,%d], "
+ "xform=0x%02x, time=%#llx, scale=%s\n",
+ current->mSlot, current->mGraphicBuffer.get(),
+ current->mCrop.left, current->mCrop.top, current->mCrop.right,
+ current->mCrop.bottom, current->mTransform, current->mTimestamp,
+ BufferItem::scalingModeName(current->mScalingMode));
+ ++current;
+ }
+
+ result.appendFormat("%s-BufferQueue mMaxAcquiredBufferCount=%d, "
+ "mDequeueBufferCannotBlock=%d, default-size=[%dx%d], "
+ "default-format=%d, transform-hint=%02x, FIFO(%d)={%s}\n",
+ prefix, mMaxAcquiredBufferCount, mDequeueBufferCannotBlock,
+ mDefaultWidth, mDefaultHeight, mDefaultBufferFormat, mTransformHint,
+ mQueue.size(), fifo.string());
+
+ // Trim the free buffers so as to not spam the dump
+ int maxBufferCount = 0;
+ for (int s = NUM_BUFFER_SLOTS - 1; s >= 0; --s) {
+ const BufferSlot& slot(mSlots[s]);
+ if (slot.mBufferState != BufferSlot::FREE ||
+ slot.mGraphicBuffer != NULL) {
+ maxBufferCount = s + 1;
+ break;
+ }
+ }
+
+ for (int s = 0; s < maxBufferCount; ++s) {
+ const BufferSlot& slot(mSlots[s]);
+ const sp<GraphicBuffer>& buffer(slot.mGraphicBuffer);
+ result.appendFormat("%s%s[%02d:%p] state=%-8s", prefix,
+ (slot.mBufferState == BufferSlot::ACQUIRED) ? ">" : " ",
+ s, buffer.get(),
+ BufferSlot::bufferStateName(slot.mBufferState));
+
+ if (buffer != NULL) {
+ result.appendFormat(", %p [%4ux%4u:%4u,%3X]", buffer->handle,
+ buffer->width, buffer->height, buffer->stride,
+ buffer->format);
+ }
+
+ result.append("\n");
+ }
+}
+
+int BufferQueueCore::getMinUndequeuedBufferCountLocked(bool async) const {
+ // If dequeueBuffer is allowed to error out, we don't have to add an
+ // extra buffer.
+ if (!mUseAsyncBuffer) {
+ return mMaxAcquiredBufferCount;
+ }
+
+ if (mDequeueBufferCannotBlock || async) {
+ return mMaxAcquiredBufferCount + 1;
+ }
+
+ return mMaxAcquiredBufferCount;
+}
+
+int BufferQueueCore::getMinMaxBufferCountLocked(bool async) const {
+ return getMinUndequeuedBufferCountLocked(async) + 1;
+}
+
+int BufferQueueCore::getMaxBufferCountLocked(bool async) const {
+ int minMaxBufferCount = getMinMaxBufferCountLocked(async);
+
+ int maxBufferCount = max(mDefaultMaxBufferCount, minMaxBufferCount);
+ if (mOverrideMaxBufferCount != 0) {
+ assert(mOverrideMaxBufferCount >= minMaxBufferCount);
+ maxBufferCount = mOverrideMaxBufferCount;
+ }
+
+ // Any buffers that are dequeued by the producer or sitting in the queue
+ // waiting to be consumed need to have their slots preserved. Such buffers
+ // will temporarily keep the max buffer count up until the slots no longer
+ // need to be preserved.
+ for (int s = maxBufferCount; s < NUM_BUFFER_SLOTS; ++s) {
+ BufferSlot::BufferState state = mSlots[s].mBufferState;
+ if (state == BufferSlot::QUEUED || state == BufferSlot::DEQUEUED) {
+ maxBufferCount = s + 1;
+ }
+ }
+
+ return maxBufferCount;
+}
+
+status_t BufferQueueCore::setDefaultMaxBufferCountLocked(int count) {
+ const int minBufferCount = mUseAsyncBuffer ? 2 : 1;
+ if (count < minBufferCount || count > NUM_BUFFER_SLOTS) {
+ BQ_LOGV("setDefaultMaxBufferCount: invalid count %d, should be in "
+ "[%d, %d]", minBufferCount, NUM_BUFFER_SLOTS);
+ return BAD_VALUE;
+ }
+
+ BQ_LOGV("setDefaultMaxBufferCount: setting count to %d", count);
+ mDefaultMaxBufferCount = count;
+ mDequeueCondition.broadcast();
+
+ return NO_ERROR;
+}
+
+void BufferQueueCore::freeBufferLocked(int slot) {
+ BQ_LOGV("freeBufferLocked: slot %d", slot);
+ mSlots[slot].mGraphicBuffer.clear();
+ if (mSlots[slot].mBufferState == BufferSlot::ACQUIRED) {
+ mSlots[slot].mNeedsCleanupOnRelease = true;
+ }
+ mSlots[slot].mBufferState = BufferSlot::FREE;
+ mSlots[slot].mFrameNumber = 0;
+ mSlots[slot].mAcquireCalled = false;
+
+ // Destroy fence as BufferQueue now takes ownership
+ if (mSlots[slot].mEglFence != EGL_NO_SYNC_KHR) {
+ eglDestroySyncKHR(mSlots[slot].mEglDisplay, mSlots[slot].mEglFence);
+ mSlots[slot].mEglFence = EGL_NO_SYNC_KHR;
+ }
+ mSlots[slot].mFence = Fence::NO_FENCE;
+}
+
+void BufferQueueCore::freeAllBuffersLocked() {
+ mBufferHasBeenQueued = false;
+ for (int s = 0; s < NUM_BUFFER_SLOTS; ++s) {
+ freeBufferLocked(s);
+ }
+}
+
+bool BufferQueueCore::stillTracking(const BufferItem* item) const {
+ const BufferSlot& slot = mSlots[item->mSlot];
+
+ BQ_LOGV("stillTracking: item { slot=%d/%llu buffer=%p } "
+ "slot { slot=%d/%llu buffer=%p }",
+ item->mSlot, item->mFrameNumber,
+ (item->mGraphicBuffer.get() ? item->mGraphicBuffer->handle : 0),
+ item->mSlot, slot.mFrameNumber,
+ (slot.mGraphicBuffer.get() ? slot.mGraphicBuffer->handle : 0));
+
+ // Compare item with its original buffer slot. We can check the slot as
+ // the buffer would not be moved to a different slot by the producer.
+ return (slot.mGraphicBuffer != NULL) &&
+ (item->mGraphicBuffer->handle == slot.mGraphicBuffer->handle);
+}
+
+} // namespace android
--- /dev/null
+/*
+ * Copyright 2014 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.
+ */
+
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <gui/BufferItem.h>
+#include <gui/BufferQueueCore.h>
+#include <gui/BufferQueueProducer.h>
+#include <gui/IConsumerListener.h>
+#include <gui/IGraphicBufferAlloc.h>
+
+#include <utils/Log.h>
+#include <utils/Trace.h>
+
+namespace android {
+
+BufferQueueProducer::BufferQueueProducer(const sp<BufferQueueCore>& core) :
+ mCore(core),
+ mSlots(core->mSlots),
+ mConsumerName() {}
+
+BufferQueueProducer::~BufferQueueProducer() {}
+
+status_t BufferQueueProducer::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
+ ATRACE_CALL();
+ BQ_LOGV("requestBuffer: slot %d", slot);
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("requestBuffer: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ if (slot < 0 || slot >= BufferQueueCore::NUM_BUFFER_SLOTS) {
+ BQ_LOGE("requestBuffer: slot index %d out of range [0, %d)",
+ slot, BufferQueueCore::NUM_BUFFER_SLOTS);
+ return BAD_VALUE;
+ } else if (mSlots[slot].mBufferState != BufferSlot::DEQUEUED) {
+ BQ_LOGE("requestBuffer: slot %d is not owned by the producer "
+ "(state = %d)", slot, mSlots[slot].mBufferState);
+ return BAD_VALUE;
+ }
+
+ mSlots[slot].mRequestBufferCalled = true;
+ *buf = mSlots[slot].mGraphicBuffer;
+ return NO_ERROR;
+}
+
+status_t BufferQueueProducer::setBufferCount(int bufferCount) {
+ ATRACE_CALL();
+ BQ_LOGV("setBufferCount: count = %d", bufferCount);
+
+ sp<IConsumerListener> listener;
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("setBufferCount: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ if (bufferCount > BufferQueueCore::NUM_BUFFER_SLOTS) {
+ BQ_LOGE("setBufferCount: bufferCount %d too large (max %d)",
+ bufferCount, BufferQueueCore::NUM_BUFFER_SLOTS);
+ return BAD_VALUE;
+ }
+
+ // There must be no dequeued buffers when changing the buffer count.
+ for (int s = 0; s < BufferQueueCore::NUM_BUFFER_SLOTS; ++s) {
+ if (mSlots[s].mBufferState == BufferSlot::DEQUEUED) {
+ BQ_LOGE("setBufferCount: buffer owned by producer");
+ return -EINVAL;
+ }
+ }
+
+ if (bufferCount == 0) {
+ mCore->mOverrideMaxBufferCount = 0;
+ mCore->mDequeueCondition.broadcast();
+ return NO_ERROR;
+ }
+
+ const int minBufferSlots = mCore->getMinMaxBufferCountLocked(false);
+ if (bufferCount < minBufferSlots) {
+ BQ_LOGE("setBufferCount: requested buffer count %d is less than "
+ "minimum %d", bufferCount, minBufferSlots);
+ return BAD_VALUE;
+ }
+
+ // Here we are guaranteed that the producer doesn't have any dequeued
+ // buffers and will release all of its buffer references. We don't
+ // clear the queue, however, so that currently queued buffers still
+ // get displayed.
+ mCore->freeAllBuffersLocked();
+ mCore->mOverrideMaxBufferCount = bufferCount;
+ mCore->mDequeueCondition.broadcast();
+ listener = mCore->mConsumerListener;
+ } // Autolock scope
+
+ // Call back without lock held
+ if (listener != NULL) {
+ listener->onBuffersReleased();
+ }
+
+ return NO_ERROR;
+}
+
+status_t BufferQueueProducer::dequeueBuffer(int *outSlot,
+ sp<android::Fence> *outFence, bool async,
+ uint32_t width, uint32_t height, uint32_t format, uint32_t usage) {
+ ATRACE_CALL();
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+ mConsumerName = mCore->mConsumerName;
+ } // Autolock scope
+
+ BQ_LOGV("dequeueBuffer: async=%s w=%u h=%u format=%#x, usage=%#x",
+ async ? "true" : "false", width, height, format, usage);
+
+ if ((width && !height) || (!width && height)) {
+ BQ_LOGE("dequeueBuffer: invalid size: w=%u h=%u", width, height);
+ return BAD_VALUE;
+ }
+
+ status_t returnFlags = NO_ERROR;
+ EGLDisplay eglDisplay = EGL_NO_DISPLAY;
+ EGLSyncKHR eglFence = EGL_NO_SYNC_KHR;
+
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (format == 0) {
+ format = mCore->mDefaultBufferFormat;
+ }
+
+ // Enable the usage bits the consumer requested
+ usage |= mCore->mConsumerUsageBits;
+
+ int found = -1;
+ bool tryAgain = true;
+ while (tryAgain) {
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("dequeueBuffer: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ const int maxBufferCount = mCore->getMaxBufferCountLocked(async);
+ if (async && mCore->mOverrideMaxBufferCount) {
+ // FIXME: Some drivers are manually setting the buffer count
+ // (which they shouldn't), so we do this extra test here to
+ // handle that case. This is TEMPORARY until we get this fixed.
+ if (mCore->mOverrideMaxBufferCount < maxBufferCount) {
+ BQ_LOGE("dequeueBuffer: async mode is invalid with "
+ "buffer count override");
+ return BAD_VALUE;
+ }
+ }
+
+ // Free up any buffers that are in slots beyond the max buffer count
+ for (int s = maxBufferCount; s < BufferQueueCore::NUM_BUFFER_SLOTS; ++s) {
+ assert(mSlots[s].mBufferState == BufferSlot::FREE);
+ if (mSlots[s].mGraphicBuffer != NULL) {
+ mCore->freeBufferLocked(s);
+ returnFlags |= RELEASE_ALL_BUFFERS;
+ }
+ }
+
+ // Look for a free buffer to give to the client
+ found = BufferQueueCore::INVALID_BUFFER_SLOT;
+ int dequeuedCount = 0;
+ int acquiredCount = 0;
+ for (int s = 0; s < maxBufferCount; ++s) {
+ switch (mSlots[s].mBufferState) {
+ case BufferSlot::DEQUEUED:
+ ++dequeuedCount;
+ break;
+ case BufferSlot::ACQUIRED:
+ ++acquiredCount;
+ break;
+ case BufferSlot::FREE:
+ // We return the oldest of the free buffers to avoid
+ // stalling the producer if possible, since the consumer
+ // may still have pending reads of in-flight buffers
+ if (found == BufferQueueCore::INVALID_BUFFER_SLOT ||
+ mSlots[s].mFrameNumber < mSlots[found].mFrameNumber) {
+ found = s;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ // Producers are not allowed to dequeue more than one buffer if they
+ // did not set a buffer count
+ if (!mCore->mOverrideMaxBufferCount && dequeuedCount) {
+ BQ_LOGE("dequeueBuffer: can't dequeue multiple buffers "
+ "without setting the buffer count");
+ return -EINVAL;
+ }
+
+ // See whether a buffer has been queued since the last
+ // setBufferCount so we know whether to perform the min undequeued
+ // buffers check below
+ if (mCore->mBufferHasBeenQueued) {
+ // Make sure the producer is not trying to dequeue more buffers
+ // than allowed
+ const int newUndequeuedCount =
+ maxBufferCount - (dequeuedCount + 1);
+ const int minUndequeuedCount =
+ mCore->getMinUndequeuedBufferCountLocked(async);
+ if (newUndequeuedCount < minUndequeuedCount) {
+ BQ_LOGE("dequeueBuffer: min undequeued buffer count (%d) "
+ "exceeded (dequeued=%d undequeued=%d)",
+ minUndequeuedCount, dequeuedCount,
+ newUndequeuedCount);
+ return -EBUSY;
+ }
+ }
+
+ // If no buffer is found, wait for a buffer to be released or for
+ // the max buffer count to change
+ tryAgain = (found == BufferQueueCore::INVALID_BUFFER_SLOT);
+ if (tryAgain) {
+ // Return an error if we're in non-blocking mode (producer and
+ // consumer are controlled by the application).
+ // However, the consumer is allowed to briefly acquire an extra
+ // buffer (which could cause us to have to wait here), which is
+ // okay, since it is only used to implement an atomic acquire +
+ // release (e.g., in GLConsumer::updateTexImage())
+ if (mCore->mDequeueBufferCannotBlock &&
+ (acquiredCount <= mCore->mMaxAcquiredBufferCount)) {
+ return WOULD_BLOCK;
+ }
+ mCore->mDequeueCondition.wait(mCore->mMutex);
+ }
+ } // while (tryAgain)
+
+ // This should not happen
+ if (found == BufferQueueCore::INVALID_BUFFER_SLOT) {
+ BQ_LOGE("dequeueBuffer: no available buffer slots");
+ return -EBUSY;
+ }
+
+ *outSlot = found;
+ ATRACE_BUFFER_INDEX(found);
+
+ const bool useDefaultSize = !width && !height;
+ if (useDefaultSize) {
+ width = mCore->mDefaultWidth;
+ height = mCore->mDefaultHeight;
+ }
+
+ mSlots[found].mBufferState = BufferSlot::DEQUEUED;
+
+ const sp<GraphicBuffer>& buffer(mSlots[found].mGraphicBuffer);
+ if ((buffer == NULL) ||
+ (static_cast<uint32_t>(buffer->width) != width) ||
+ (static_cast<uint32_t>(buffer->height) != height) ||
+ (static_cast<uint32_t>(buffer->format) != format) ||
+ ((static_cast<uint32_t>(buffer->usage) & usage) != usage))
+ {
+ mSlots[found].mAcquireCalled = false;
+ mSlots[found].mGraphicBuffer = NULL;
+ mSlots[found].mRequestBufferCalled = false;
+ mSlots[found].mEglDisplay = EGL_NO_DISPLAY;
+ mSlots[found].mEglFence = EGL_NO_SYNC_KHR;
+ mSlots[found].mFence = Fence::NO_FENCE;
+
+ returnFlags |= BUFFER_NEEDS_REALLOCATION;
+ }
+
+ if (CC_UNLIKELY(mSlots[found].mFence == NULL)) {
+ BQ_LOGE("dequeueBuffer: about to return a NULL fence - "
+ "slot=%d w=%d h=%d format=%u",
+ found, buffer->width, buffer->height, buffer->format);
+ }
+
+ eglDisplay = mSlots[found].mEglDisplay;
+ eglFence = mSlots[found].mEglFence;
+ *outFence = mSlots[found].mFence;
+ mSlots[found].mEglFence = EGL_NO_SYNC_KHR;
+ mSlots[found].mFence = Fence::NO_FENCE;
+ } // Autolock scope
+
+ if (returnFlags & BUFFER_NEEDS_REALLOCATION) {
+ status_t error;
+ sp<GraphicBuffer> graphicBuffer(mCore->mAllocator->createGraphicBuffer(
+ width, height, format, usage, &error));
+ if (graphicBuffer == NULL) {
+ BQ_LOGE("dequeueBuffer: createGraphicBuffer failed");
+ return error;
+ }
+
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("dequeueBuffer: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ mSlots[*outSlot].mFrameNumber = ~0;
+ mSlots[*outSlot].mGraphicBuffer = graphicBuffer;
+ } // Autolock scope
+ }
+
+ if (eglFence != EGL_NO_SYNC_KHR) {
+ EGLint result = eglClientWaitSyncKHR(eglDisplay, eglFence, 0,
+ 1000000000);
+ // If something goes wrong, log the error, but return the buffer without
+ // synchronizing access to it. It's too late at this point to abort the
+ // dequeue operation.
+ if (result == EGL_FALSE) {
+ BQ_LOGE("dequeueBuffer: error %#x waiting for fence",
+ eglGetError());
+ } else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
+ BQ_LOGE("dequeueBuffer: timeout waiting for fence");
+ }
+ eglDestroySyncKHR(eglDisplay, eglFence);
+ }
+
+ BQ_LOGV("dequeueBuffer: returning slot=%d/%llu buf=%p flags=%#x", *outSlot,
+ mSlots[*outSlot].mFrameNumber,
+ mSlots[*outSlot].mGraphicBuffer->handle, returnFlags);
+
+ return returnFlags;
+}
+
+status_t BufferQueueProducer::queueBuffer(int slot,
+ const QueueBufferInput &input, QueueBufferOutput *output) {
+ ATRACE_CALL();
+ ATRACE_BUFFER_INDEX(slot);
+
+ int64_t timestamp;
+ bool isAutoTimestamp;
+ Rect crop;
+ int scalingMode;
+ uint32_t transform;
+ bool async;
+ sp<Fence> fence;
+ input.deflate(×tamp, &isAutoTimestamp, &crop, &scalingMode, &transform,
+ &async, &fence);
+
+ if (fence == NULL) {
+ BQ_LOGE("queueBuffer: fence is NULL");
+ return BAD_VALUE;
+ }
+
+ switch (scalingMode) {
+ case NATIVE_WINDOW_SCALING_MODE_FREEZE:
+ case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
+ case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
+ case NATIVE_WINDOW_SCALING_MODE_NO_SCALE_CROP:
+ break;
+ default:
+ BQ_LOGE("queueBuffer: unknown scaling mode %d", scalingMode);
+ return -EINVAL;
+ }
+
+ sp<IConsumerListener> listener;
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("queueBuffer: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ const int maxBufferCount = mCore->getMaxBufferCountLocked(async);
+ if (async && mCore->mOverrideMaxBufferCount) {
+ // FIXME: Some drivers are manually setting the buffer count
+ // (which they shouldn't), so we do this extra test here to
+ // handle that case. This is TEMPORARY until we get this fixed.
+ if (mCore->mOverrideMaxBufferCount < maxBufferCount) {
+ BQ_LOGE("queueBuffer: async mode is invalid with "
+ "buffer count override");
+ return BAD_VALUE;
+ }
+ }
+
+ if (slot < 0 || slot >= maxBufferCount) {
+ BQ_LOGE("queueBuffer: slot index %d out of range [0, %d)",
+ slot, maxBufferCount);
+ return -EINVAL;
+ } else if (mSlots[slot].mBufferState != BufferSlot::DEQUEUED) {
+ BQ_LOGE("queueBuffer: slot %d is not owned by the producer "
+ "(state = %d)", slot, mSlots[slot].mBufferState);
+ return -EINVAL;
+ } else if (!mSlots[slot].mRequestBufferCalled) {
+ BQ_LOGE("queueBuffer: slot %d was queued without requesting "
+ "a buffer", slot);
+ return -EINVAL;
+ }
+
+ BQ_LOGV("queueBuffer: slot=%d/%llu time=%llu crop=[%d,%d,%d,%d] "
+ "transform=%#x scale=%s",
+ slot, mCore->mFrameCounter + 1, timestamp,
+ crop.left, crop.top, crop.right, crop.bottom,
+ transform, BufferItem::scalingModeName(scalingMode));
+
+ const sp<GraphicBuffer>& graphicBuffer(mSlots[slot].mGraphicBuffer);
+ Rect bufferRect(graphicBuffer->getWidth(), graphicBuffer->getHeight());
+ Rect croppedRect;
+ crop.intersect(bufferRect, &croppedRect);
+ if (croppedRect != crop) {
+ BQ_LOGE("queueBuffer: crop rect is not contained within the "
+ "buffer in slot %d", slot);
+ return -EINVAL;
+ }
+
+ mSlots[slot].mFence = fence;
+ mSlots[slot].mBufferState = BufferSlot::QUEUED;
+ ++mCore->mFrameCounter;
+ mSlots[slot].mFrameNumber = mCore->mFrameCounter;
+
+ BufferItem item;
+ item.mAcquireCalled = mSlots[slot].mAcquireCalled;
+ item.mGraphicBuffer = mSlots[slot].mGraphicBuffer;
+ item.mCrop = crop;
+ item.mTransform = transform & ~NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
+ item.mTransformToDisplayInverse =
+ bool(transform & NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY);
+ item.mScalingMode = scalingMode;
+ item.mTimestamp = timestamp;
+ item.mIsAutoTimestamp = isAutoTimestamp;
+ item.mFrameNumber = mCore->mFrameCounter;
+ item.mSlot = slot;
+ item.mFence = fence;
+ item.mIsDroppable = mCore->mDequeueBufferCannotBlock || async;
+
+ if (mCore->mQueue.empty()) {
+ // When the queue is empty, we can ignore mDequeueBufferCannotBlock
+ // and simply queue this buffer
+ mCore->mQueue.push_back(item);
+ listener = mCore->mConsumerListener;
+ } else {
+ // When the queue is not empty, we need to look at the front buffer
+ // state to see if we need to replace it
+ BufferQueueCore::Fifo::iterator front(mCore->mQueue.begin());
+ if (front->mIsDroppable) {
+ // If the front queued buffer is still being tracked, we first
+ // mark it as freed
+ if (mCore->stillTracking(front)) {
+ mSlots[front->mSlot].mBufferState = BufferSlot::FREE;
+ // Reset the frame number of the freed buffer so that it is
+ // the first in line to be dequeued again
+ mSlots[front->mSlot].mFrameNumber = 0;
+ }
+ // Overwrite the droppable buffer with the incoming one
+ *front = item;
+ } else {
+ mCore->mQueue.push_back(item);
+ listener = mCore->mConsumerListener;
+ }
+ }
+
+ mCore->mBufferHasBeenQueued = true;
+ mCore->mDequeueCondition.broadcast();
+
+ output->inflate(mCore->mDefaultWidth, mCore->mDefaultHeight,
+ mCore->mTransformHint, mCore->mQueue.size());
+
+ ATRACE_INT(mCore->mConsumerName.string(), mCore->mQueue.size());
+ } // Autolock scope
+
+ // Call back without lock held
+ if (listener != NULL) {
+ listener->onFrameAvailable();
+ }
+
+ return NO_ERROR;
+}
+
+void BufferQueueProducer::cancelBuffer(int slot, const sp<Fence>& fence) {
+ ATRACE_CALL();
+ BQ_LOGV("cancelBuffer: slot %d", slot);
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("cancelBuffer: BufferQueue has been abandoned");
+ return;
+ }
+
+ if (slot < 0 || slot >= BufferQueueCore::NUM_BUFFER_SLOTS) {
+ BQ_LOGE("cancelBuffer: slot index %d out of range [0, %d)",
+ slot, BufferQueueCore::NUM_BUFFER_SLOTS);
+ return;
+ } else if (mSlots[slot].mBufferState != BufferSlot::DEQUEUED) {
+ BQ_LOGE("cancelBuffer: slot %d is not owned by the producer "
+ "(state = %d)", slot, mSlots[slot].mBufferState);
+ return;
+ } else if (fence == NULL) {
+ BQ_LOGE("cancelBuffer: fence is NULL");
+ return;
+ }
+
+ mSlots[slot].mBufferState = BufferSlot::FREE;
+ mSlots[slot].mFrameNumber = 0;
+ mSlots[slot].mFence = fence;
+ mCore->mDequeueCondition.broadcast();
+}
+
+int BufferQueueProducer::query(int what, int *outValue) {
+ ATRACE_CALL();
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (outValue == NULL) {
+ BQ_LOGE("query: outValue was NULL");
+ return BAD_VALUE;
+ }
+
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("query: BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ int value;
+ switch (what) {
+ case NATIVE_WINDOW_WIDTH:
+ value = mCore->mDefaultWidth;
+ break;
+ case NATIVE_WINDOW_HEIGHT:
+ value = mCore->mDefaultHeight;
+ break;
+ case NATIVE_WINDOW_FORMAT:
+ value = mCore->mDefaultBufferFormat;
+ break;
+ case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
+ value = mCore->getMinUndequeuedBufferCountLocked(false);
+ break;
+ case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND:
+ value = (mCore->mQueue.size() > 1);
+ break;
+ case NATIVE_WINDOW_CONSUMER_USAGE_BITS:
+ value = mCore->mConsumerUsageBits;
+ break;
+ default:
+ return BAD_VALUE;
+ }
+
+ BQ_LOGV("query: %d? %d", what, value);
+ *outValue = value;
+ return NO_ERROR;
+}
+
+status_t BufferQueueProducer::connect(const sp<android::IBinder> &token,
+ int api, bool producerControlledByApp, QueueBufferOutput *output) {
+ ATRACE_CALL();
+ Mutex::Autolock lock(mCore->mMutex);
+ mConsumerName = mCore->mConsumerName;
+ BQ_LOGV("connect(P): api=%d producerControlledByApp=%s", api,
+ producerControlledByApp ? "true" : "false");
+
+ // If we disconnect and reconnect quickly, we can be in a state where our
+ // slots are empty but we have many buffers in the queue. This can cause us
+ // to run out of memory if we outrun the consumer. Wait here if it looks
+ // like we have too many buffers queued up.
+ while (true) {
+ if (mCore->mIsAbandoned) {
+ BQ_LOGE("connect(P): BufferQueue has been abandoned");
+ return NO_INIT;
+ }
+
+ if (mCore->mConsumerListener == NULL) {
+ BQ_LOGE("connect(P): BufferQueue has no consumer");
+ return NO_INIT;
+ }
+
+ if (output == NULL) {
+ BQ_LOGE("connect(P): output was NULL");
+ return BAD_VALUE;
+ }
+
+ if (mCore->mConnectedApi != BufferQueueCore::NO_CONNECTED_API) {
+ BQ_LOGE("connect(P): already connected (cur=%d req=%d)",
+ mCore->mConnectedApi, api);
+ return BAD_VALUE;
+ }
+
+ size_t maxBufferCount = mCore->getMaxBufferCountLocked(false);
+ if (mCore->mQueue.size() <= maxBufferCount) {
+ // The queue size seems small enough to proceed
+ // TODO: Make this bound tighter?
+ break;
+ }
+
+ BQ_LOGV("connect(P): queue size is %d, waiting", mCore->mQueue.size());
+ mCore->mDequeueCondition.wait(mCore->mMutex);
+ }
+
+ int status = NO_ERROR;
+ switch (api) {
+ case NATIVE_WINDOW_API_EGL:
+ case NATIVE_WINDOW_API_CPU:
+ case NATIVE_WINDOW_API_MEDIA:
+ case NATIVE_WINDOW_API_CAMERA:
+ mCore->mConnectedApi = api;
+ output->inflate(mCore->mDefaultWidth, mCore->mDefaultHeight,
+ mCore->mTransformHint, mCore->mQueue.size());
+
+ // Set up a death notification so that we can disconnect
+ // automatically if the remote producer dies
+ if (token != NULL && token->remoteBinder() != NULL) {
+ status = token->linkToDeath(
+ static_cast<IBinder::DeathRecipient*>(this));
+ if (status == NO_ERROR) {
+ mCore->mConnectedProducerToken = token;
+ } else {
+ BQ_LOGE("connect(P): linkToDeath failed: %s (%d)",
+ strerror(-status), status);
+ }
+ }
+ break;
+ default:
+ BQ_LOGE("connect(P): unknown API %d", api);
+ status = BAD_VALUE;
+ break;
+ }
+
+ mCore->mBufferHasBeenQueued = false;
+ mCore->mDequeueBufferCannotBlock =
+ mCore->mConsumerControlledByApp && producerControlledByApp;
+
+ return status;
+}
+
+status_t BufferQueueProducer::disconnect(int api) {
+ ATRACE_CALL();
+ BQ_LOGV("disconnect(P): api %d", api);
+
+ int status = NO_ERROR;
+ sp<IConsumerListener> listener;
+ { // Autolock scope
+ Mutex::Autolock lock(mCore->mMutex);
+
+ if (mCore->mIsAbandoned) {
+ // It's not really an error to disconnect after the surface has
+ // been abandoned; it should just be a no-op.
+ return NO_ERROR;
+ }
+
+ switch (api) {
+ case NATIVE_WINDOW_API_EGL:
+ case NATIVE_WINDOW_API_CPU:
+ case NATIVE_WINDOW_API_MEDIA:
+ case NATIVE_WINDOW_API_CAMERA:
+ if (mCore->mConnectedApi == api) {
+ mCore->freeAllBuffersLocked();
+
+ // Remove our death notification callback if we have one
+ sp<IBinder> token = mCore->mConnectedProducerToken;
+ if (token != NULL) {
+ // This can fail if we're here because of the death
+ // notification, but we just ignore it
+ token->unlinkToDeath(
+ static_cast<IBinder::DeathRecipient*>(this));
+ }
+ mCore->mConnectedProducerToken = NULL;
+ mCore->mConnectedApi = BufferQueueCore::NO_CONNECTED_API;
+ mCore->mDequeueCondition.broadcast();
+ listener = mCore->mConsumerListener;
+ } else {
+ BQ_LOGE("disconnect(P): connected to another API "
+ "(cur=%d req=%d)", mCore->mConnectedApi, api);
+ status = -EINVAL;
+ }
+ break;
+ default:
+ BQ_LOGE("disconnect(P): unknown API %d", api);
+ status = -EINVAL;
+ break;
+ }
+ } // Autolock scope
+
+ // Call back without lock held
+ if (listener != NULL) {
+ listener->onBuffersReleased();
+ }
+
+ return status;
+}
+
+void BufferQueueProducer::binderDied(const wp<android::IBinder>& /* who */) {
+ // If we're here, it means that a producer we were connected to died.
+ // We're guaranteed that we are still connected to it because we remove
+ // this callback upon disconnect. It's therefore safe to read mConnectedApi
+ // without synchronization here.
+ int api = mCore->mConnectedApi;
+ disconnect(api);
+}
+
+} // namespace android
--- /dev/null
+#include <gui/BufferSlot.h>
+
+namespace android {
+
+const char* BufferSlot::bufferStateName(BufferState state) {
+ switch (state) {
+ case BufferSlot::DEQUEUED: return "DEQUEUED";
+ case BufferSlot::QUEUED: return "QUEUED";
+ case BufferSlot::FREE: return "FREE";
+ case BufferSlot::ACQUIRED: return "ACQUIRED";
+ default: return "Unknown";
+ }
+}
+
+} // namespace android
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