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/*
* Copyright (C) 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 GRAPHIC_BUFFER_LISTENER_H_
#define GRAPHIC_BUFFER_LISTENER_H_
#include <gui/BufferQueue.h>
namespace android {
struct AMessage;
struct GraphicBufferListener : public BufferQueue::ConsumerListener {
public:
GraphicBufferListener() {};
status_t init(
const sp<AMessage> ¬ify,
size_t bufferWidth, size_t bufferHeight, size_t bufferCount);
virtual void onFrameAvailable(const BufferItem& item);
virtual void onBuffersReleased();
virtual void onSidebandStreamChanged();
// Returns the handle to the producer side of the BufferQueue. Buffers
// queued on this will be received by GraphicBufferListener.
sp<IGraphicBufferProducer> getIGraphicBufferProducer() const {
return mProducer;
}
BufferItem getBufferItem();
sp<GraphicBuffer> getBuffer(BufferItem item);
status_t releaseBuffer(BufferItem item);
enum {
kWhatFrameAvailable = 'frav',
};
private:
sp<AMessage> mNotify;
size_t mNumFramesAvailable;
mutable Mutex mMutex;
// Our BufferQueue interfaces. mProducer is passed to the producer through
// getIGraphicBufferProducer, and mConsumer is used internally to retrieve
// the buffers queued by the producer.
sp<IGraphicBufferProducer> mProducer;
sp<IGraphicBufferConsumer> mConsumer;
// Cache of GraphicBuffers from the buffer queue.
sp<GraphicBuffer> mBufferSlot[BufferQueue::NUM_BUFFER_SLOTS];
};
} // namespace android
#endif // GRAPHIC_BUFFER_LISTENER_H
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