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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 <media/NdkImage.h>
#include <media/NdkImageReader.h>
// ---------------------------------------------------------------------------
namespace android {
namespace renderscript {
class Allocation;
class Context;
/**
* 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:
GrallocConsumer(const Context *, Allocation *, uint32_t numAlloc);
virtual ~GrallocConsumer();
ANativeWindow* getNativeWindow();
media_status_t lockNextBuffer(uint32_t idx = 0);
media_status_t unlockBuffer(uint32_t idx = 0);
uint32_t getNextAvailableIdx(Allocation *a);
bool releaseIdx(uint32_t idx);
bool isActive();
uint32_t mNumAlloc;
static void onFrameAvailable(void* obj, AImageReader* reader);
private:
media_status_t releaseAcquiredBufferLocked(uint32_t idx);
// Boolean array to check if a position has been occupied or not.
bool *isIdxUsed;
Allocation **mAlloc;
const Context *mCtx;
AImageReader* mImgReader;
ANativeWindow* mNativeWindow;
AImageReader_ImageListener mReaderCb;
// Tracking for buffers acquired by the user
struct AcquiredBuffer {
AImage *mImg;
uint8_t *mBufferPointer;
AcquiredBuffer() :
mImg(nullptr),
mBufferPointer(nullptr) {
}
};
AcquiredBuffer *mAcquiredBuffer;
};
} // namespace renderscript
} // namespace android
#endif // ANDROID_RS_GRALLOC_CONSUMER_H
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