993772a60a
This change allows producers to set a generation number on a
BufferQueue. This number will be embedded in any new GraphicBuffers
created in that BufferQueue, and attempts to attach buffers which have
a different generation number will fail.
It also plumbs the setGenerationNumber method through Surface, with the
additional effect that any buffers attached to the Surface after
setting a new generation number will automatically be updated with the
new number (as opposed to failing, as would happen on through IGBP).
Bug: 20923096
Change-Id: I32bf726b035f99c3e5834beaf76afb9f01adcbc2
(cherry picked from commit 812ed0644f)
226 lines
10 KiB
C++
226 lines
10 KiB
C++
/*
|
|
* 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/BufferQueueDefs.h>
|
|
#include <gui/IGraphicBufferProducer.h>
|
|
|
|
namespace android {
|
|
|
|
class BufferSlot;
|
|
|
|
class BufferQueueProducer : public BnGraphicBufferProducer,
|
|
private IBinder::DeathRecipient {
|
|
public:
|
|
friend class BufferQueue; // Needed to access binderDied
|
|
|
|
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// flags indicating that previously-returned buffers are no longer valid.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.
|
|
//
|
|
// 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, PixelFormat format,
|
|
uint32_t usage);
|
|
|
|
// See IGraphicBufferProducer::detachBuffer
|
|
virtual status_t detachBuffer(int slot);
|
|
|
|
// See IGraphicBufferProducer::detachNextBuffer
|
|
virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
|
|
sp<Fence>* outFence);
|
|
|
|
// See IGraphicBufferProducer::attachBuffer
|
|
virtual status_t attachBuffer(int* outSlot, const sp<GraphicBuffer>& buffer);
|
|
|
|
// 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<IProducerListener>& listener,
|
|
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);
|
|
|
|
// Attaches a sideband buffer stream to the IGraphicBufferProducer.
|
|
//
|
|
// A sideband stream is a device-specific mechanism for passing buffers
|
|
// from the producer to the consumer without using dequeueBuffer/
|
|
// queueBuffer. If a sideband stream is present, the consumer can choose
|
|
// whether to acquire buffers from the sideband stream or from the queued
|
|
// buffers.
|
|
//
|
|
// Passing NULL or a different stream handle will detach the previous
|
|
// handle if any.
|
|
virtual status_t setSidebandStream(const sp<NativeHandle>& stream);
|
|
|
|
// See IGraphicBufferProducer::allocateBuffers
|
|
virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
|
|
PixelFormat format, uint32_t usage);
|
|
|
|
// See IGraphicBufferProducer::allowAllocation
|
|
virtual status_t allowAllocation(bool allow);
|
|
|
|
// See IGraphicBufferProducer::setGenerationNumber
|
|
virtual status_t setGenerationNumber(uint32_t generationNumber);
|
|
|
|
private:
|
|
// This is required by the IBinder::DeathRecipient interface
|
|
virtual void binderDied(const wp<IBinder>& who);
|
|
|
|
// waitForFreeSlotThenRelock finds the oldest slot in the FREE state. It may
|
|
// block if there are no available slots and we are not in non-blocking
|
|
// mode (producer and consumer controlled by the application). If it blocks,
|
|
// it will release mCore->mMutex while blocked so that other operations on
|
|
// the BufferQueue may succeed.
|
|
status_t waitForFreeSlotThenRelock(const char* caller, bool async,
|
|
int* found, status_t* returnFlags) const;
|
|
|
|
sp<BufferQueueCore> mCore;
|
|
|
|
// This references mCore->mSlots. Lock mCore->mMutex while accessing.
|
|
BufferQueueDefs::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;
|
|
|
|
uint32_t mStickyTransform;
|
|
|
|
// This saves the fence from the last queueBuffer, such that the
|
|
// next queueBuffer call can throttle buffer production. The prior
|
|
// queueBuffer's fence is not nessessarily available elsewhere,
|
|
// since the previous buffer might have already been acquired.
|
|
sp<Fence> mLastQueueBufferFence;
|
|
|
|
// Take-a-ticket system for ensuring that onFrame* callbacks are called in
|
|
// the order that frames are queued. While the BufferQueue lock
|
|
// (mCore->mMutex) is held, a ticket is retained by the producer. After
|
|
// dropping the BufferQueue lock, the producer must wait on the condition
|
|
// variable until the current callback ticket matches its retained ticket.
|
|
Mutex mCallbackMutex;
|
|
int mNextCallbackTicket; // Protected by mCore->mMutex
|
|
int mCurrentCallbackTicket; // Protected by mCallbackMutex
|
|
Condition mCallbackCondition;
|
|
|
|
}; // class BufferQueueProducer
|
|
|
|
} // namespace android
|
|
|
|
#endif
|