2012-01-22 23:26:27 +00:00
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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_GUI_BUFFERQUEUE_H
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#define ANDROID_GUI_BUFFERQUEUE_H
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2014-03-03 18:16:19 +00:00
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#include <gui/BufferQueueProducer.h>
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#include <gui/BufferQueueConsumer.h>
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2013-08-01 03:09:53 +00:00
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#include <gui/IConsumerListener.h>
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2012-01-22 23:26:27 +00:00
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2014-03-03 18:16:19 +00:00
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// These are only required to keep other parts of the framework with incomplete
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// dependencies building successfully
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#include <gui/IGraphicBufferAlloc.h>
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2012-01-22 23:26:27 +00:00
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2014-03-03 18:16:19 +00:00
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#include <binder/IBinder.h>
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2012-01-22 23:26:27 +00:00
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namespace android {
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// ----------------------------------------------------------------------------
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2013-09-12 02:35:45 +00:00
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class BufferQueue : public BnGraphicBufferProducer,
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public BnGraphicBufferConsumer,
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private IBinder::DeathRecipient {
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2012-01-22 23:26:27 +00:00
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public:
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2013-11-13 02:02:20 +00:00
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// BufferQueue will keep track of at most this value of buffers.
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// Attempts at runtime to increase the number of buffers past this will fail.
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2012-01-22 23:26:27 +00:00
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enum { NUM_BUFFER_SLOTS = 32 };
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2013-11-13 02:02:20 +00:00
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// Used as a placeholder slot# when the value isn't pointing to an existing buffer.
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enum { INVALID_BUFFER_SLOT = IGraphicBufferConsumer::BufferItem::INVALID_BUFFER_SLOT };
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// Alias to <IGraphicBufferConsumer.h> -- please scope from there in future code!
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enum {
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NO_BUFFER_AVAILABLE = IGraphicBufferConsumer::NO_BUFFER_AVAILABLE,
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PRESENT_LATER = IGraphicBufferConsumer::PRESENT_LATER,
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};
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2012-01-22 23:26:27 +00:00
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2012-08-31 01:36:22 +00:00
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// When in async mode we reserve two slots in order to guarantee that the
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// producer and consumer can run asynchronously.
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enum { MAX_MAX_ACQUIRED_BUFFERS = NUM_BUFFER_SLOTS - 2 };
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2013-08-01 03:09:53 +00:00
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// for backward source compatibility
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typedef ::android::ConsumerListener ConsumerListener;
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2012-03-15 21:01:24 +00:00
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// ProxyConsumerListener is a ConsumerListener implementation that keeps a weak
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// reference to the actual consumer object. It forwards all calls to that
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// consumer object so long as it exists.
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//
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// This class exists to avoid having a circular reference between the
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// BufferQueue object and the consumer object. The reason this can't be a weak
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// reference in the BufferQueue class is because we're planning to expose the
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// consumer side of a BufferQueue as a binder interface, which doesn't support
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// weak references.
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2013-08-01 03:09:53 +00:00
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class ProxyConsumerListener : public BnConsumerListener {
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2012-03-15 21:01:24 +00:00
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public:
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2013-08-01 03:09:53 +00:00
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ProxyConsumerListener(const wp<ConsumerListener>& consumerListener);
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2012-03-15 21:01:24 +00:00
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virtual ~ProxyConsumerListener();
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virtual void onFrameAvailable();
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virtual void onBuffersReleased();
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private:
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2013-08-01 03:09:53 +00:00
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// mConsumerListener is a weak reference to the IConsumerListener. This is
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2012-03-15 21:01:24 +00:00
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// the raison d'etre of ProxyConsumerListener.
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2013-08-01 03:09:53 +00:00
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wp<ConsumerListener> mConsumerListener;
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2012-01-22 23:26:27 +00:00
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};
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2012-08-28 01:48:37 +00:00
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// BufferQueue manages a pool of gralloc memory slots to be used by
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2013-07-17 05:56:09 +00:00
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// producers and consumers. allocator is used to allocate all the
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// needed gralloc buffers.
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BufferQueue(const sp<IGraphicBufferAlloc>& allocator = NULL);
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2012-01-22 23:26:27 +00:00
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virtual ~BufferQueue();
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2013-09-12 02:35:45 +00:00
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/*
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* IBinder::DeathRecipient interface
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*/
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virtual void binderDied(const wp<IBinder>& who);
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2013-08-01 03:09:53 +00:00
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/*
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* IGraphicBufferProducer interface
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*/
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2013-04-05 00:09:03 +00:00
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// Query native window attributes. The "what" values are enumerated in
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// window.h (e.g. NATIVE_WINDOW_FORMAT).
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2012-01-30 23:51:27 +00:00
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virtual int query(int what, int* value);
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2013-04-05 00:09:03 +00:00
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// setBufferCount updates the number of available buffer slots. If this
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// method succeeds, buffer slots will be both unallocated and owned by
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// the BufferQueue object (i.e. they are not owned by the producer or
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// consumer).
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//
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// This will fail if the producer has dequeued any buffers, or if
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// bufferCount is invalid. bufferCount must generally be a value
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2013-11-19 00:58:36 +00:00
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// between the minimum undequeued buffer count (exclusive) and NUM_BUFFER_SLOTS
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2013-04-05 00:09:03 +00:00
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// (inclusive). It may also be set to zero (the default) to indicate
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// that the producer does not wish to set a value. The minimum value
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// can be obtained by calling query(NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS,
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// ...).
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//
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// This may only be called by the producer. The consumer will be told
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// to discard buffers through the onBuffersReleased callback.
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2012-01-22 23:26:27 +00:00
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virtual status_t setBufferCount(int bufferCount);
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2013-04-05 00:09:03 +00:00
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// requestBuffer returns the GraphicBuffer for slot N.
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//
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// In normal operation, this is called the first time slot N is returned
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// by dequeueBuffer. It must be called again if dequeueBuffer returns
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// flags indicating that previously-returned buffers are no longer valid.
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2012-01-22 23:26:27 +00:00
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virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf);
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2013-04-05 00:09:03 +00:00
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// dequeueBuffer gets the next buffer slot index for the producer to use.
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// If a buffer slot is available then that slot index is written to the
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// location pointed to by the buf argument and a status of OK is returned.
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// If no slot is available then a status of -EBUSY is returned and buf is
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2012-01-22 23:26:27 +00:00
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// unmodified.
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2012-06-14 22:26:33 +00:00
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//
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// The fence parameter will be updated to hold the fence associated with
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// the buffer. The contents of the buffer must not be overwritten until the
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2013-04-05 00:09:03 +00:00
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// fence signals. If the fence is Fence::NO_FENCE, the buffer may be
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// written immediately.
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2012-06-14 22:26:33 +00:00
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//
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2012-01-22 23:26:27 +00:00
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// The width and height parameters must be no greater than the minimum of
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// GL_MAX_VIEWPORT_DIMS and GL_MAX_TEXTURE_SIZE (see: glGetIntegerv).
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// An error due to invalid dimensions might not be reported until
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2013-04-05 00:09:03 +00:00
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// updateTexImage() is called. If width and height are both zero, the
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// default values specified by setDefaultBufferSize() are used instead.
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//
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// The pixel formats are enumerated in graphics.h, e.g.
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// HAL_PIXEL_FORMAT_RGBA_8888. If the format is 0, the default format
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// will be used.
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//
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// The usage argument specifies gralloc buffer usage flags. The values
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// are enumerated in gralloc.h, e.g. GRALLOC_USAGE_HW_RENDER. These
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// will be merged with the usage flags specified by setConsumerUsageBits.
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//
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// The return value may be a negative error value or a non-negative
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// collection of flags. If the flags are set, the return values are
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// valid, but additional actions must be performed.
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//
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// If IGraphicBufferProducer::BUFFER_NEEDS_REALLOCATION is set, the
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// producer must discard cached GraphicBuffer references for the slot
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// returned in buf.
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// If IGraphicBufferProducer::RELEASE_ALL_BUFFERS is set, the producer
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// must discard cached GraphicBuffer references for all slots.
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//
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// In both cases, the producer will need to call requestBuffer to get a
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// GraphicBuffer handle for the returned slot.
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2013-07-19 05:10:56 +00:00
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virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
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2012-06-14 22:26:33 +00:00
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uint32_t width, uint32_t height, uint32_t format, uint32_t usage);
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2012-01-22 23:26:27 +00:00
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2013-04-05 00:09:03 +00:00
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// queueBuffer returns a filled buffer to the BufferQueue.
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//
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// Additional data is provided in the QueueBufferInput struct. Notably,
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// a timestamp must be provided for the buffer. The timestamp is in
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2012-01-22 23:26:27 +00:00
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// nanoseconds, and must be monotonically increasing. Its other semantics
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2013-04-05 00:09:03 +00:00
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// (zero point, etc) are producer-specific and should be documented by the
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// producer.
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//
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// The caller may provide a fence that signals when all rendering
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// operations have completed. Alternatively, NO_FENCE may be used,
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// indicating that the buffer is ready immediately.
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//
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// Some values are returned in the output struct: the current settings
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// for default width and height, the current transform hint, and the
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// number of queued buffers.
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2012-04-09 23:14:01 +00:00
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virtual status_t queueBuffer(int buf,
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const QueueBufferInput& input, QueueBufferOutput* output);
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2013-04-05 00:09:03 +00:00
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// cancelBuffer returns a dequeued buffer to the BufferQueue, but doesn't
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// queue it for use by the consumer.
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//
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// The buffer will not be overwritten until the fence signals. The fence
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// will usually be the one obtained from dequeueBuffer.
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2013-03-16 04:34:30 +00:00
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virtual void cancelBuffer(int buf, const sp<Fence>& fence);
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2012-01-22 23:26:27 +00:00
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2013-04-05 00:09:03 +00:00
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// connect attempts to connect a producer API to the BufferQueue. This
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// must be called before any other IGraphicBufferProducer methods are
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// called except for getAllocator. A consumer must already be connected.
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//
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// This method will fail if connect was previously called on the
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// BufferQueue and no corresponding disconnect call was made (i.e. if
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// it's still connected to a producer).
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2012-01-22 23:26:27 +00:00
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//
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2013-04-05 00:09:03 +00:00
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// APIs are enumerated in window.h (e.g. NATIVE_WINDOW_API_CPU).
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2013-09-12 02:35:45 +00:00
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virtual status_t connect(const sp<IBinder>& token,
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int api, bool producerControlledByApp, QueueBufferOutput* output);
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2012-01-22 23:26:27 +00:00
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2013-04-05 00:09:03 +00:00
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// disconnect attempts to disconnect a producer API from the BufferQueue.
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// Calling this method will cause any subsequent calls to other
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2012-12-18 17:49:45 +00:00
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// IGraphicBufferProducer methods to fail except for getAllocator and connect.
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2012-01-22 23:26:27 +00:00
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// Successfully calling connect after this will allow the other methods to
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// succeed again.
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//
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// This method will fail if the the BufferQueue is not currently
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2013-04-05 00:09:03 +00:00
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// connected to the specified producer API.
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2012-01-22 23:26:27 +00:00
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virtual status_t disconnect(int api);
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2013-08-01 03:09:53 +00:00
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/*
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* IGraphicBufferConsumer interface
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*/
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2012-01-22 23:26:27 +00:00
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2012-03-15 21:01:24 +00:00
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// acquireBuffer attempts to acquire ownership of the next pending buffer in
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2013-11-13 02:02:20 +00:00
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// the BufferQueue. If no buffer is pending then it returns NO_BUFFER_AVAILABLE. If a
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2012-03-15 21:01:24 +00:00
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// buffer is successfully acquired, the information about the buffer is
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// returned in BufferItem. If the buffer returned had previously been
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// acquired then the BufferItem::mGraphicBuffer field of buffer is set to
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// NULL and it is assumed that the consumer still holds a reference to the
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// buffer.
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2013-06-28 20:52:40 +00:00
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//
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// If presentWhen is nonzero, it indicates the time when the buffer will
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// be displayed on screen. If the buffer's timestamp is farther in the
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// future, the buffer won't be acquired, and PRESENT_LATER will be
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// returned. The presentation time is in nanoseconds, and the time base
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// is CLOCK_MONOTONIC.
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2013-11-13 02:02:20 +00:00
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virtual status_t acquireBuffer(BufferItem* buffer, nsecs_t presentWhen);
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2012-01-22 23:26:27 +00:00
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// releaseBuffer releases a buffer slot from the consumer back to the
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2013-04-05 00:09:03 +00:00
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// BufferQueue. This may be done while the buffer's contents are still
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// being accessed. The fence will signal when the buffer is no longer
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2013-05-03 21:50:50 +00:00
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// in use. frameNumber is used to indentify the exact buffer returned.
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2012-03-15 21:01:24 +00:00
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//
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2012-04-17 00:54:33 +00:00
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// If releaseBuffer returns STALE_BUFFER_SLOT, then the consumer must free
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// any references to the just-released buffer that it might have, as if it
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// had received a onBuffersReleased() call with a mask set for the released
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// buffer.
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//
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2012-03-15 21:01:24 +00:00
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// Note that the dependencies on EGL will be removed once we switch to using
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// the Android HW Sync HAL.
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2013-08-01 03:09:53 +00:00
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virtual status_t releaseBuffer(int buf, uint64_t frameNumber,
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2013-05-03 21:50:50 +00:00
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EGLDisplay display, EGLSyncKHR fence,
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2012-06-14 22:26:33 +00:00
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const sp<Fence>& releaseFence);
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2012-01-22 23:26:27 +00:00
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2012-03-15 21:01:24 +00:00
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// consumerConnect connects a consumer to the BufferQueue. Only one
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// consumer may be connected, and when that consumer disconnects the
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// BufferQueue is placed into the "abandoned" state, causing most
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// interactions with the BufferQueue by the producer to fail.
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2013-07-17 05:56:09 +00:00
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// controlledByApp indicates whether the consumer is controlled by
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// the application.
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2013-04-05 00:09:03 +00:00
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//
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// consumer may not be NULL.
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2013-08-01 03:09:53 +00:00
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virtual status_t consumerConnect(const sp<IConsumerListener>& consumer, bool controlledByApp);
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2012-03-15 21:01:24 +00:00
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2012-01-22 23:26:27 +00:00
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// consumerDisconnect disconnects a consumer from the BufferQueue. All
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2012-03-15 21:01:24 +00:00
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// buffers will be freed and the BufferQueue is placed in the "abandoned"
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// state, causing most interactions with the BufferQueue by the producer to
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// fail.
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2013-08-01 03:09:53 +00:00
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virtual status_t consumerDisconnect();
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2012-01-22 23:26:27 +00:00
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2012-03-15 21:01:24 +00:00
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// getReleasedBuffers sets the value pointed to by slotMask to a bit mask
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2013-04-05 00:09:03 +00:00
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// indicating which buffer slots have been released by the BufferQueue
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2012-03-15 21:01:24 +00:00
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// but have not yet been released by the consumer.
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2013-04-05 00:09:03 +00:00
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//
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// This should be called from the onBuffersReleased() callback.
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2013-08-01 03:09:53 +00:00
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virtual status_t getReleasedBuffers(uint32_t* slotMask);
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2012-03-15 21:01:24 +00:00
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2012-01-22 23:26:27 +00:00
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// setDefaultBufferSize is used to set the size of buffers returned by
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2013-04-05 00:09:03 +00:00
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// dequeueBuffer when a width and height of zero is requested. Default
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// is 1x1.
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2013-08-01 03:09:53 +00:00
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virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h);
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2012-01-22 23:26:27 +00:00
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2013-04-05 00:09:03 +00:00
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// setDefaultMaxBufferCount sets the default value for the maximum buffer
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// count (the initial default is 2). If the producer has requested a
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// buffer count using setBufferCount, the default buffer count will only
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// take effect if the producer sets the count back to zero.
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//
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// The count must be between 2 and NUM_BUFFER_SLOTS, inclusive.
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2013-08-01 03:09:53 +00:00
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virtual status_t setDefaultMaxBufferCount(int bufferCount);
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2012-01-22 23:26:27 +00:00
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2013-07-24 00:28:53 +00:00
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// disableAsyncBuffer disables the extra buffer used in async mode
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// (when both producer and consumer have set their "isControlledByApp"
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// flag) and has dequeueBuffer() return WOULD_BLOCK instead.
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//
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// This can only be called before consumerConnect().
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2013-08-01 03:09:53 +00:00
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virtual status_t disableAsyncBuffer();
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2013-07-24 00:28:53 +00:00
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2012-08-28 01:48:37 +00:00
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// setMaxAcquiredBufferCount sets the maximum number of buffers that can
|
2013-04-05 00:09:03 +00:00
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// be acquired by the consumer at one time (default 1). This call will
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// fail if a producer is connected to the BufferQueue.
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2013-08-01 03:09:53 +00:00
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virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers);
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2012-08-28 01:48:37 +00:00
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2012-01-22 23:26:27 +00:00
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// setConsumerName sets the name used in logging
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2013-08-01 03:09:53 +00:00
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virtual void setConsumerName(const String8& name);
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2012-01-22 23:26:27 +00:00
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2012-02-23 22:35:13 +00:00
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// setDefaultBufferFormat allows the BufferQueue to create
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// GraphicBuffers of a defaultFormat if no format is specified
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2013-04-05 00:09:03 +00:00
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// in dequeueBuffer. Formats are enumerated in graphics.h; the
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// initial default is HAL_PIXEL_FORMAT_RGBA_8888.
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2013-08-01 03:09:53 +00:00
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virtual status_t setDefaultBufferFormat(uint32_t defaultFormat);
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2012-02-23 22:35:13 +00:00
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2013-04-05 00:09:03 +00:00
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// setConsumerUsageBits will turn on additional usage bits for dequeueBuffer.
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// These are merged with the bits passed to dequeueBuffer. The values are
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// enumerated in gralloc.h, e.g. GRALLOC_USAGE_HW_RENDER; the default is 0.
|
2013-08-01 03:09:53 +00:00
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virtual status_t setConsumerUsageBits(uint32_t usage);
|
2012-02-23 22:35:13 +00:00
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|
2013-04-05 00:09:03 +00:00
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|
// setTransformHint bakes in rotation to buffers so overlays can be used.
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// The values are enumerated in window.h, e.g.
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// NATIVE_WINDOW_TRANSFORM_ROT_90. The default is 0 (no transform).
|
2013-08-01 03:09:53 +00:00
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|
virtual status_t setTransformHint(uint32_t hint);
|
2012-01-22 23:26:27 +00:00
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|
2013-08-02 08:40:18 +00:00
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|
// dump our state in a String
|
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|
virtual void dump(String8& result, const char* prefix) const;
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|
2012-01-22 23:26:27 +00:00
|
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|
private:
|
2014-03-03 18:16:19 +00:00
|
|
|
sp<BufferQueueProducer> mProducer;
|
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|
|
sp<BufferQueueConsumer> mConsumer;
|
2012-01-22 23:26:27 +00:00
|
|
|
};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_GUI_BUFFERQUEUE_H
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