2013-08-01 03:09:53 +00:00
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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_ICONSUMERLISTENER_H
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#define ANDROID_GUI_ICONSUMERLISTENER_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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namespace android {
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// ----------------------------------------------------------------------------
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2014-11-04 19:37:46 +00:00
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class BufferItem;
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2013-08-01 03:09:53 +00:00
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// ConsumerListener is the interface through which the BufferQueue notifies
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// the consumer of events that the consumer may wish to react to. Because
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// the consumer will generally have a mutex that is locked during calls from
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// the consumer to the BufferQueue, these calls from the BufferQueue to the
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// consumer *MUST* be called only when the BufferQueue mutex is NOT locked.
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class ConsumerListener : public virtual RefBase {
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public:
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ConsumerListener() { }
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virtual ~ConsumerListener() { }
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// onFrameAvailable is called from queueBuffer each time an additional
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// frame becomes available for consumption. This means that frames that
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// are queued while in asynchronous mode only trigger the callback if no
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// previous frames are pending. Frames queued while in synchronous mode
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2014-11-04 19:37:46 +00:00
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// always trigger the callback. The item passed to the callback will contain
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// all of the information about the queued frame except for its
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// GraphicBuffer pointer, which will always be null.
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//
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// This is called without any lock held and can be called concurrently
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// by multiple threads.
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virtual void onFrameAvailable(const BufferItem& item) = 0; /* Asynchronous */
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// onFrameReplaced is called from queueBuffer if the frame being queued is
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// replacing an existing slot in the queue. Any call to queueBuffer that
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// doesn't call onFrameAvailable will call this callback instead. The item
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// passed to the callback will contain all of the information about the
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// queued frame except for its GraphicBuffer pointer, which will always be
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// null.
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2013-08-01 03:09:53 +00:00
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//
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// This is called without any lock held and can be called concurrently
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// by multiple threads.
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2014-11-08 00:49:48 +00:00
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virtual void onFrameReplaced(const BufferItem& /* item */) {} /* Asynchronous */
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2013-08-01 03:09:53 +00:00
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// onBuffersReleased is called to notify the buffer consumer that the
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// BufferQueue has released its references to one or more GraphicBuffers
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// contained in its slots. The buffer consumer should then call
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// BufferQueue::getReleasedBuffers to retrieve the list of buffers
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//
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// This is called without any lock held and can be called concurrently
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// by multiple threads.
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virtual void onBuffersReleased() = 0; /* Asynchronous */
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2014-03-03 23:42:54 +00:00
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// onSidebandStreamChanged is called to notify the buffer consumer that the
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// BufferQueue's sideband buffer stream has changed. This is called when a
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// stream is first attached and when it is either detached or replaced by a
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// different stream.
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virtual void onSidebandStreamChanged() = 0; /* Asynchronous */
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2013-08-01 03:09:53 +00:00
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};
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class IConsumerListener : public ConsumerListener, public IInterface
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{
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public:
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DECLARE_META_INTERFACE(ConsumerListener);
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};
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// ----------------------------------------------------------------------------
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class BnConsumerListener : public BnInterface<IConsumerListener>
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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_ICONSUMERLISTENER_H
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