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