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openpilot v0.6 release
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Vehicle Researcher
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/*
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* Copyright (C) 2013 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_IGRAPHICBUFFERCONSUMER_H
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#define ANDROID_GUI_IGRAPHICBUFFERCONSUMER_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 <utils/Timers.h>
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#include <binder/IInterface.h>
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#include <ui/PixelFormat.h>
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#include <ui/Rect.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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namespace android {
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// ----------------------------------------------------------------------------
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class BufferItem;
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class Fence;
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class GraphicBuffer;
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class IConsumerListener;
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class NativeHandle;
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class IGraphicBufferConsumer : public IInterface {
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public:
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enum {
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// Returned by releaseBuffer, after which the consumer must
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// free any references to the just-released buffer that it might have.
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STALE_BUFFER_SLOT = 1,
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// Returned by dequeueBuffer if there are no pending buffers available.
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NO_BUFFER_AVAILABLE,
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// Returned by dequeueBuffer if it's too early for the buffer to be acquired.
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PRESENT_LATER,
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};
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// acquireBuffer attempts to acquire ownership of the next pending buffer in
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// the BufferQueue. If no buffer is pending then it returns
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// NO_BUFFER_AVAILABLE. If a buffer is successfully acquired, the
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// information about the buffer is returned in BufferItem.
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//
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// 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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//
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// If presentWhen is non-zero, 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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//
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// If maxFrameNumber is non-zero, it indicates that acquireBuffer should
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// only return a buffer with a frame number less than or equal to
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// maxFrameNumber. If no such frame is available (such as when a buffer has
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// been replaced but the consumer has not received the onFrameReplaced
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// callback), then PRESENT_LATER will be returned.
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//
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// Return of NO_ERROR means the operation completed as normal.
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//
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// Return of a positive value means the operation could not be completed
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// at this time, but the user should try again later:
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// * NO_BUFFER_AVAILABLE - no buffer is pending (nothing queued by producer)
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// * PRESENT_LATER - the buffer's timestamp is farther in the future
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//
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// Return of a negative value means an error has occurred:
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// * INVALID_OPERATION - too many buffers have been acquired
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virtual status_t acquireBuffer(BufferItem* buffer, nsecs_t presentWhen,
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uint64_t maxFrameNumber = 0) = 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 acquired.
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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 - 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 acquired.
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virtual status_t detachBuffer(int slot) = 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 acquired
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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 acquired.
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//
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// If the buffer is successfully attached, its frameNumber is initialized
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// to 0. This must be passed into the releaseBuffer call or else the buffer
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// will be deallocated as stale.
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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 - outSlot or buffer were NULL, or the generation number of
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// the buffer did not match the buffer queue.
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// * INVALID_OPERATION - cannot attach the buffer because it would cause too
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// many buffers to be acquired.
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// * NO_MEMORY - no free slots available
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virtual status_t attachBuffer(int *outSlot,
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const sp<GraphicBuffer>& buffer) = 0;
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// releaseBuffer releases a buffer slot from the consumer back to the
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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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// in use. frameNumber is used to indentify the exact buffer returned.
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//
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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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// 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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//
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// Return of NO_ERROR means the operation completed as normal.
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//
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// Return of a positive value means the operation could not be completed
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// at this time, but the user should try again later:
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// * STALE_BUFFER_SLOT - see above (second paragraph)
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//
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// Return of a negative value means an error has occurred:
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// * BAD_VALUE - one of the following could've happened:
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// * the buffer slot was invalid
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// * the fence was NULL
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// * the buffer slot specified is not in the acquired state
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virtual status_t releaseBuffer(int buf, uint64_t frameNumber,
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EGLDisplay display, EGLSyncKHR fence,
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const sp<Fence>& releaseFence) = 0;
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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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// controlledByApp indicates whether the consumer is controlled by
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// the application.
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//
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// consumer may not be NULL.
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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 - a NULL consumer was provided
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virtual status_t consumerConnect(const sp<IConsumerListener>& consumer, bool controlledByApp) = 0;
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// consumerDisconnect disconnects a consumer from the BufferQueue. All
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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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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * BAD_VALUE - no consumer is currently connected
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virtual status_t consumerDisconnect() = 0;
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// getReleasedBuffers sets the value pointed to by slotMask to a bit set.
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// Each bit index with a 1 corresponds to a released buffer slot with that
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// index value. In particular, a released buffer is one that has
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// been released by the BufferQueue but have not yet been released by the consumer.
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//
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// This should be called from the onBuffersReleased() callback.
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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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virtual status_t getReleasedBuffers(uint64_t* slotMask) = 0;
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// setDefaultBufferSize is used to set the size of buffers returned by
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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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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * BAD_VALUE - either w or h was zero
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virtual status_t setDefaultBufferSize(uint32_t w, uint32_t h) = 0;
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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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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * BAD_VALUE - bufferCount was out of range (see above).
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virtual status_t setDefaultMaxBufferCount(int bufferCount) = 0;
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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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//
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// Return of a value other than NO_ERROR means an error has occurred:
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// * INVALID_OPERATION - attempting to call this after consumerConnect.
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virtual status_t disableAsyncBuffer() = 0;
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// setMaxAcquiredBufferCount sets the maximum number of buffers that can
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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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//
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// maxAcquiredBuffers must be (inclusive) between 1 and MAX_MAX_ACQUIRED_BUFFERS.
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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 - maxAcquiredBuffers was out of range (see above).
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// * INVALID_OPERATION - attempting to call this after a producer connected.
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virtual status_t setMaxAcquiredBufferCount(int maxAcquiredBuffers) = 0;
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// setConsumerName sets the name used in logging
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virtual void setConsumerName(const String8& name) = 0;
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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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// in dequeueBuffer.
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// The initial default is PIXEL_FORMAT_RGBA_8888.
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//
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// Return of a value other than NO_ERROR means an unknown error has occurred.
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virtual status_t setDefaultBufferFormat(PixelFormat defaultFormat) = 0;
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// setDefaultBufferDataSpace is a request to the producer to provide buffers
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// of the indicated dataSpace. The producer may ignore this request.
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// The initial default is HAL_DATASPACE_UNKNOWN.
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//
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// Return of a value other than NO_ERROR means an unknown error has occurred.
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virtual status_t setDefaultBufferDataSpace(
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android_dataspace defaultDataSpace) = 0;
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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.
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//
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// Return of a value other than NO_ERROR means an unknown error has occurred.
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virtual status_t setConsumerUsageBits(uint32_t usage) = 0;
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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).
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//
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// Return of a value other than NO_ERROR means an unknown error has occurred.
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virtual status_t setTransformHint(uint32_t hint) = 0;
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// Retrieve the sideband buffer stream, if any.
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virtual sp<NativeHandle> getSidebandStream() const = 0;
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// dump state into a string
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virtual void dump(String8& result, const char* prefix) const = 0;
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public:
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DECLARE_META_INTERFACE(GraphicBufferConsumer);
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};
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// ----------------------------------------------------------------------------
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class BnGraphicBufferConsumer : public BnInterface<IGraphicBufferConsumer>
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{
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public:
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virtual status_t onTransact( uint32_t code,
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const Parcel& data,
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Parcel* reply,
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uint32_t flags = 0);
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};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_GUI_IGRAPHICBUFFERCONSUMER_H
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