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/*
* Copyright (C) 2017 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 AAUDIO_SHARED_MEMORY_PROXY_H
#define AAUDIO_SHARED_MEMORY_PROXY_H
#include <stdint.h>
#include <cutils/ashmem.h>
#include <sys/mman.h>
#include <aaudio/AAudio.h>
namespace aaudio {
/**
* Proxy for sharing memory between two file descriptors.
*/
class SharedMemoryProxy {
public:
SharedMemoryProxy() = default;
~SharedMemoryProxy();
aaudio_result_t open(int fd, int32_t capacityInBytes);
int getFileDescriptor() const {
return mProxyFileDescriptor;
}
private:
int mOriginalFileDescriptor = -1;
int mProxyFileDescriptor = -1;
uint8_t *mOriginalSharedMemory = nullptr;
uint8_t *mProxySharedMemory = nullptr;
int32_t mSharedMemorySizeInBytes = 0;
};
} /* namespace aaudio */
#endif //AAUDIO_SHARED_MEMORY_PROXY_H