dd883c0b08
Enables -Weverything and -Werror, with just a few exceptions for warnings we can't (or shouldn't need to) work around. This is a squashed commit based on an initial change with a couple of fixes to avoid breaking certain targets. The source commits are:d723bd766900d504c06e429ba89cd2Change-Id: I034abec27bf4020d84af60d7acc1939c59986dd6
467 lines
22 KiB
C++
467 lines
22 KiB
C++
/*
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* Copyright (C) 2010 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_IGRAPHICBUFFERPRODUCER_H
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#define ANDROID_GUI_IGRAPHICBUFFERPRODUCER_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <binder/IInterface.h>
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#include <ui/Fence.h>
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#include <ui/GraphicBuffer.h>
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#include <ui/Rect.h>
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namespace android {
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// ----------------------------------------------------------------------------
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class IProducerListener;
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class NativeHandle;
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class Surface;
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/*
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* This class defines the Binder IPC interface for the producer side of
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* a queue of graphics buffers. It's used to send graphics data from one
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* component to another. For example, a class that decodes video for
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* playback might use this to provide frames. This is typically done
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* indirectly, through Surface.
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*
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* The underlying mechanism is a BufferQueue, which implements
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* BnGraphicBufferProducer. In normal operation, the producer calls
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* dequeueBuffer() to get an empty buffer, fills it with data, then
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* calls queueBuffer() to make it available to the consumer.
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*
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* This class was previously called ISurfaceTexture.
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*/
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class IGraphicBufferProducer : public IInterface
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{
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public:
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DECLARE_META_INTERFACE(GraphicBufferProducer);
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enum {
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// A flag returned by dequeueBuffer when the client needs to call
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// requestBuffer immediately thereafter.
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BUFFER_NEEDS_REALLOCATION = 0x1,
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// A flag returned by dequeueBuffer when all mirrored slots should be
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// released by the client. This flag should always be processed first.
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RELEASE_ALL_BUFFERS = 0x2,
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};
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// requestBuffer requests a new buffer for the given index. The server (i.e.
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// the IGraphicBufferProducer implementation) assigns the newly created
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// buffer to the given slot index, and the client is expected to mirror the
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// slot->buffer mapping so that it's not necessary to transfer a
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// GraphicBuffer for every dequeue operation.
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//
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// The slot must be in the range of [0, NUM_BUFFER_SLOTS).
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - one of the two conditions occurred:
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// * slot was out of range (see above)
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// * buffer specified by the slot is not dequeued
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virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf) = 0;
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// setBufferCount sets the number of buffer slots available. Calling this
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// will also cause all buffer slots to be emptied. The caller should empty
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// its mirrored copy of the buffer slots when calling this method.
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//
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// This function should not be called when there are any dequeued buffer
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// slots, doing so will result in a BAD_VALUE error returned.
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//
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// The buffer count should be at most NUM_BUFFER_SLOTS (inclusive), but at least
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// the minimum undequeued buffer count (exclusive). The minimum value
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// can be obtained by calling query(NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS).
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// In particular the range is (minUndequeudBuffers, NUM_BUFFER_SLOTS].
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//
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// The buffer count may also be set to 0 (the default), to indicate that
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// the producer does not wish to set a value.
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - one of the below conditions occurred:
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// * bufferCount was out of range (see above)
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// * client has one or more buffers dequeued
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virtual status_t setBufferCount(int bufferCount) = 0;
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// dequeueBuffer requests a new buffer slot for the client to use. Ownership
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// of the slot is transfered to the client, meaning that the server will not
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// use the contents of the buffer associated with that slot.
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//
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// The slot index returned may or may not contain a buffer (client-side).
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// If the slot is empty the client should call requestBuffer to assign a new
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// buffer to that slot.
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//
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// Once the client is done filling this buffer, it is expected to transfer
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// buffer ownership back to the server with either cancelBuffer on
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// the dequeued slot or to fill in the contents of its associated buffer
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// contents and call queueBuffer.
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//
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// If dequeueBuffer returns the BUFFER_NEEDS_REALLOCATION flag, the client is
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// expected to call requestBuffer immediately.
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//
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// If dequeueBuffer returns the RELEASE_ALL_BUFFERS flag, the client is
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// expected to release all of the mirrored slot->buffer mappings.
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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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// fence signals. If the fence is Fence::NO_FENCE, the buffer may be written
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// immediately.
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//
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// The async parameter sets whether we're in asynchronous mode for this
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// dequeueBuffer() call.
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//
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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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// 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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// If the format is 0, the default format 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
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// IGraphicBufferConsumer::setConsumerUsageBits.
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//
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// This call will block until a buffer is available to be dequeued. If
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// both the producer and consumer are controlled by the app, then this call
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// can never block and will return WOULD_BLOCK if no buffer is available.
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//
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// A non-negative value with flags set (see above) will be returned upon
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// success.
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//
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// Return of a negative means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - both in async mode and buffer count was less than the
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// max numbers of buffers that can be allocated at once.
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// * INVALID_OPERATION - cannot attach the buffer because it would cause
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// too many buffers to be dequeued, either because
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// the producer already has a single buffer dequeued
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// and did not set a buffer count, or because a
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// buffer count was set and this call would cause
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// it to be exceeded.
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// * WOULD_BLOCK - no buffer is currently available, and blocking is disabled
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// since both the producer/consumer are controlled by app
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// * NO_MEMORY - out of memory, cannot allocate the graphics buffer.
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//
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// All other negative values are an unknown error returned downstream
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// from the graphics allocator (typically errno).
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virtual status_t dequeueBuffer(int* slot, sp<Fence>* fence, bool async,
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uint32_t w, uint32_t h, PixelFormat format, uint32_t usage) = 0;
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// detachBuffer attempts to remove all ownership of the buffer in the given
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// slot from the buffer queue. If this call succeeds, the slot will be
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// freed, and there will be no way to obtain the buffer from this interface.
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// The freed slot will remain unallocated until either it is selected to
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// hold a freshly allocated buffer in dequeueBuffer or a buffer is attached
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// to the slot. The buffer must have already been dequeued, and the caller
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// must already possesses the sp<GraphicBuffer> (i.e., must have called
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// requestBuffer).
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - the given slot number is invalid, either because it is
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// out of the range [0, NUM_BUFFER_SLOTS), or because the slot
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// it refers to is not currently dequeued and requested.
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virtual status_t detachBuffer(int slot) = 0;
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// detachNextBuffer is equivalent to calling dequeueBuffer, requestBuffer,
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// and detachBuffer in sequence, except for two things:
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//
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// 1) It is unnecessary to know the dimensions, format, or usage of the
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// next buffer.
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// 2) It will not block, since if it cannot find an appropriate buffer to
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// return, it will return an error instead.
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//
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// Only slots that are free but still contain a GraphicBuffer will be
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// considered, and the oldest of those will be returned. outBuffer is
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// equivalent to outBuffer from the requestBuffer call, and outFence is
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// equivalent to fence from the dequeueBuffer call.
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - either outBuffer or outFence were NULL.
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// * NO_MEMORY - no slots were found that were both free and contained a
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// GraphicBuffer.
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virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
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sp<Fence>* outFence) = 0;
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// attachBuffer attempts to transfer ownership of a buffer to the buffer
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// queue. If this call succeeds, it will be as if this buffer was dequeued
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// from the returned slot number. As such, this call will fail if attaching
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// this buffer would cause too many buffers to be simultaneously dequeued.
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//
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// If attachBuffer returns the RELEASE_ALL_BUFFERS flag, the caller is
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// expected to release all of the mirrored slot->buffer mappings.
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//
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// A non-negative value with flags set (see above) will be returned upon
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// success.
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//
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// Return of a negative value means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - outSlot or buffer were NULL or invalid combination of
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// async mode and buffer count override.
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// * INVALID_OPERATION - cannot attach the buffer because it would cause
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// too many buffers to be dequeued, either because
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// the producer already has a single buffer dequeued
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// and did not set a buffer count, or because a
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// buffer count was set and this call would cause
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// it to be exceeded.
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// * WOULD_BLOCK - no buffer slot is currently available, and blocking is
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// disabled since both the producer/consumer are
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// controlled by the app.
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virtual status_t attachBuffer(int* outSlot,
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const sp<GraphicBuffer>& buffer) = 0;
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// queueBuffer indicates that the client has finished filling in the
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// contents of the buffer associated with slot and transfers ownership of
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// that slot back to the server.
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//
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// It is not valid to call queueBuffer on a slot that is not owned
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// by the client or one for which a buffer associated via requestBuffer
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// (an attempt to do so will fail with a return value of BAD_VALUE).
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//
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// In addition, the input must be described by the client (as documented
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// below). Any other properties (zero point, etc)
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// are client-dependent, and should be documented by the client.
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//
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// The slot must be in the range of [0, NUM_BUFFER_SLOTS).
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//
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// Upon success, the output will be filled with meaningful values
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// (refer to the documentation below).
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - one of the below conditions occurred:
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// * fence was NULL
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// * scaling mode was unknown
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// * both in async mode and buffer count was less than the
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// max numbers of buffers that can be allocated at once
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// * slot index was out of range (see above).
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// * the slot was not in the dequeued state
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// * the slot was enqueued without requesting a buffer
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// * crop rect is out of bounds of the buffer dimensions
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struct QueueBufferInput : public Flattenable<QueueBufferInput> {
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friend class Flattenable<QueueBufferInput>;
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inline QueueBufferInput(const Parcel& parcel);
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// timestamp - a monotonically increasing value in nanoseconds
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// isAutoTimestamp - if the timestamp was synthesized at queue time
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// crop - a crop rectangle that's used as a hint to the consumer
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// scalingMode - a set of flags from NATIVE_WINDOW_SCALING_* in <window.h>
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// transform - a set of flags from NATIVE_WINDOW_TRANSFORM_* in <window.h>
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// async - if the buffer is queued in asynchronous mode
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// fence - a fence that the consumer must wait on before reading the buffer,
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// set this to Fence::NO_FENCE if the buffer is ready immediately
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// sticky - the sticky transform set in Surface (only used by the LEGACY
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// camera mode).
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inline QueueBufferInput(int64_t timestamp, bool isAutoTimestamp,
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const Rect& crop, int scalingMode, uint32_t transform, bool async,
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const sp<Fence>& fence, uint32_t sticky = 0)
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: timestamp(timestamp), isAutoTimestamp(isAutoTimestamp), crop(crop),
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scalingMode(scalingMode), transform(transform), stickyTransform(sticky),
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async(async), fence(fence) { }
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inline void deflate(int64_t* outTimestamp, bool* outIsAutoTimestamp,
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Rect* outCrop, int* outScalingMode, uint32_t* outTransform,
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bool* outAsync, sp<Fence>* outFence,
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uint32_t* outStickyTransform = NULL) const {
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*outTimestamp = timestamp;
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*outIsAutoTimestamp = bool(isAutoTimestamp);
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*outCrop = crop;
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*outScalingMode = scalingMode;
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*outTransform = transform;
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*outAsync = bool(async);
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*outFence = fence;
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if (outStickyTransform != NULL) {
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*outStickyTransform = stickyTransform;
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}
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}
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// Flattenable protocol
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size_t getFlattenedSize() const;
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size_t getFdCount() const;
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status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const;
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status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count);
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private:
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int64_t timestamp;
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int isAutoTimestamp;
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Rect crop;
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int scalingMode;
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uint32_t transform;
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uint32_t stickyTransform;
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int async;
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sp<Fence> fence;
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};
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// QueueBufferOutput must be a POD structure
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struct __attribute__ ((__packed__)) QueueBufferOutput {
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inline QueueBufferOutput() { }
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// outWidth - filled with default width applied to the buffer
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// outHeight - filled with default height applied to the buffer
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// outTransformHint - filled with default transform applied to the buffer
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// outNumPendingBuffers - num buffers queued that haven't yet been acquired
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// (counting the currently queued buffer)
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inline void deflate(uint32_t* outWidth,
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uint32_t* outHeight,
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uint32_t* outTransformHint,
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uint32_t* outNumPendingBuffers) const {
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*outWidth = width;
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*outHeight = height;
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*outTransformHint = transformHint;
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*outNumPendingBuffers = numPendingBuffers;
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}
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inline void inflate(uint32_t inWidth, uint32_t inHeight,
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uint32_t inTransformHint, uint32_t inNumPendingBuffers) {
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width = inWidth;
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height = inHeight;
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transformHint = inTransformHint;
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numPendingBuffers = inNumPendingBuffers;
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}
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private:
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uint32_t width;
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uint32_t height;
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uint32_t transformHint;
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uint32_t numPendingBuffers;
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};
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virtual status_t queueBuffer(int slot,
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const QueueBufferInput& input, QueueBufferOutput* output) = 0;
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// cancelBuffer indicates that the client does not wish to fill in the
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// buffer associated with slot and transfers ownership of the slot back to
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// the server.
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//
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// The buffer is not queued 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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virtual void cancelBuffer(int slot, const sp<Fence>& fence) = 0;
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// query retrieves some information for this surface
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// 'what' tokens allowed are that of NATIVE_WINDOW_* in <window.h>
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - the buffer queue has been abandoned.
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// * BAD_VALUE - what was out of range
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virtual int query(int what, int* value) = 0;
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// connect attempts to connect a client API to the IGraphicBufferProducer.
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// This must be called before any other IGraphicBufferProducer methods are
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// called except for getAllocator. A consumer must be already connected.
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//
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// This method will fail if the connect was previously called on the
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// IGraphicBufferProducer and no corresponding disconnect call was made.
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//
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// The listener is an optional binder callback object that can be used if
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// the producer wants to be notified when the consumer releases a buffer
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// back to the BufferQueue. It is also used to detect the death of the
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// producer. If only the latter functionality is desired, there is a
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// DummyProducerListener class in IProducerListener.h that can be used.
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//
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// The api should be one of the NATIVE_WINDOW_API_* values in <window.h>
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//
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// The producerControlledByApp should be set to true if the producer is hosted
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// by an untrusted process (typically app_process-forked processes). If both
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// the producer and the consumer are app-controlled then all buffer queues
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// will operate in async mode regardless of the async flag.
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//
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// Upon success, the output will be filled with meaningful data
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// (refer to QueueBufferOutput documentation above).
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * NO_INIT - one of the following occurred:
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// * the buffer queue was abandoned
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// * no consumer has yet connected
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// * BAD_VALUE - one of the following has occurred:
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// * the producer is already connected
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// * api was out of range (see above).
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// * output was NULL.
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// * DEAD_OBJECT - the token is hosted by an already-dead process
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//
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// Additional negative errors may be returned by the internals, they
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// should be treated as opaque fatal unrecoverable errors.
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virtual status_t connect(const sp<IProducerListener>& listener,
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int api, bool producerControlledByApp, QueueBufferOutput* output) = 0;
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// disconnect attempts to disconnect a client API from the
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// IGraphicBufferProducer. Calling this method will cause any subsequent
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// calls to other IGraphicBufferProducer methods to fail except for
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// getAllocator and connect. Successfully calling connect after this will
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// allow the other methods to succeed again.
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//
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// This method will fail if the the IGraphicBufferProducer is not currently
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// connected to the specified client API.
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//
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// The api should be one of the NATIVE_WINDOW_API_* values in <window.h>
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//
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// Disconnecting from an abandoned IGraphicBufferProducer is legal and
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// is considered a no-op.
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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * BAD_VALUE - one of the following has occurred:
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// * the api specified does not match the one that was connected
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// * api was out of range (see above).
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// * DEAD_OBJECT - the token is hosted by an already-dead process
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virtual status_t disconnect(int api) = 0;
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// Attaches a sideband buffer stream to the IGraphicBufferProducer.
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//
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// A sideband stream is a device-specific mechanism for passing buffers
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// from the producer to the consumer without using dequeueBuffer/
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// queueBuffer. If a sideband stream is present, the consumer can choose
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// whether to acquire buffers from the sideband stream or from the queued
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// buffers.
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//
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// Passing NULL or a different stream handle will detach the previous
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// handle if any.
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virtual status_t setSidebandStream(const sp<NativeHandle>& stream) = 0;
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// Allocates buffers based on the given dimensions/format.
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//
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// This function will allocate up to the maximum number of buffers
|
|
// permitted by the current BufferQueue configuration. It will use the
|
|
// given format, dimensions, and usage bits, which are interpreted in the
|
|
// same way as for dequeueBuffer, and the async flag must be set the same
|
|
// way as for dequeueBuffer to ensure that the correct number of buffers are
|
|
// allocated. This is most useful to avoid an allocation delay during
|
|
// dequeueBuffer. If there are already the maximum number of buffers
|
|
// allocated, this function has no effect.
|
|
virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
|
|
PixelFormat format, uint32_t usage) = 0;
|
|
};
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|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
class BnGraphicBufferProducer : public BnInterface<IGraphicBufferProducer>
|
|
{
|
|
public:
|
|
virtual status_t onTransact( uint32_t code,
|
|
const Parcel& data,
|
|
Parcel* reply,
|
|
uint32_t flags = 0);
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
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|
}; // namespace android
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|
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#endif // ANDROID_GUI_IGRAPHICBUFFERPRODUCER_H
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