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/*
* Copyright (C) 2013 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_RS_GRALLOC_CONSUMER_H
#define ANDROID_RS_GRALLOC_CONSUMER_H
#include <gui/ConsumerBase.h>
#include <ui/GraphicBuffer.h>
#include <utils/String8.h>
#include <utils/Vector.h>
#include <utils/threads.h>
// ---------------------------------------------------------------------------
namespace android {
namespace renderscript {
class Allocation;
/**
* CpuConsumer is a BufferQueue consumer endpoint that allows direct CPU
* access to the underlying gralloc buffers provided by BufferQueue. Multiple
* buffers may be acquired by it at once, to be used concurrently by the
* CpuConsumer owner. Sets gralloc usage flags to be software-read-only.
* This queue is synchronous by default.
*/
class GrallocConsumer : public ConsumerBase
{
public:
typedef ConsumerBase::FrameAvailableListener FrameAvailableListener;
GrallocConsumer(Allocation *, const sp<IGraphicBufferConsumer>& bq);
virtual ~GrallocConsumer();
status_t lockNextBuffer();
status_t unlockBuffer();
private:
status_t releaseAcquiredBufferLocked();
Allocation *mAlloc;
// Tracking for buffers acquired by the user
struct AcquiredBuffer {
// Need to track the original mSlot index and the buffer itself because
// the mSlot entry may be freed/reused before the acquired buffer is
// released.
int mSlot;
sp<GraphicBuffer> mGraphicBuffer;
void *mBufferPointer;
AcquiredBuffer() :
mSlot(BufferQueue::INVALID_BUFFER_SLOT),
mBufferPointer(NULL) {
}
};
AcquiredBuffer mAcquiredBuffer;
};
} // namespace renderscript
} // namespace android
#endif // ANDROID_RS_GRALLOC_CONSUMER_H
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