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135 lines
4.9 KiB
135 lines
4.9 KiB
/*
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* Copyright 2020 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 ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSULTRASONICSARRAY_H
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#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSULTRASONICSARRAY_H
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#include <thread>
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#include <utility>
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#include <android-base/macros.h>
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#include <android/hidl/allocator/1.0/IAllocator.h>
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#include <android/hidl/memory/1.0/IMemory.h>
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#include <utils/threads.h>
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#include <android/hardware/automotive/evs/1.1/IEvsUltrasonicsArray.h>
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#include <android/hardware/automotive/evs/1.1/IEvsUltrasonicsArrayStream.h>
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#include <android/hardware/automotive/evs/1.1/types.h>
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using ::android::hardware::hidl_memory;
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using ::android::hardware::automotive::evs::V1_0::EvsResult;
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using ::android::hardware::automotive::evs::V1_1::IEvsUltrasonicsArray;
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using ::android::hardware::automotive::evs::V1_1::IEvsUltrasonicsArrayStream;
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using ::android::hardware::automotive::evs::V1_1::UltrasonicsArrayDesc;
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using ::android::hardware::automotive::evs::V1_1::UltrasonicsDataFrameDesc;
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using ::android::hidl::allocator::V1_0::IAllocator;
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using ::android::hidl::memory::V1_0::IMemory;
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namespace android {
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namespace hardware {
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namespace automotive {
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namespace evs {
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namespace V1_1 {
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namespace implementation {
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class EvsUltrasonicsArray : public IEvsUltrasonicsArray {
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public:
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// Methods from ::android::hardware::automotive::evs::V1_1::IEvsUltrasonicsArray follow.
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Return<void> getUltrasonicArrayInfo(getUltrasonicArrayInfo_cb _get_info_cb) override;
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Return<EvsResult> setMaxFramesInFlight(uint32_t bufferCount) override;
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Return<void> doneWithDataFrame(const UltrasonicsDataFrameDesc& dataFrameDesc) override;
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Return<EvsResult> startStream(const ::android::sp<IEvsUltrasonicsArrayStream>& stream) override;
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Return<void> stopStream() override;
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// Factory function to create a array.
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static sp<EvsUltrasonicsArray> Create(const char* deviceName);
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// Returns a ultrasonics array descriptor filled with sample data.
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static UltrasonicsArrayDesc GetMockArrayDesc(const char* id);
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DISALLOW_COPY_AND_ASSIGN(EvsUltrasonicsArray);
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virtual ~EvsUltrasonicsArray() override;
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void forceShutdown(); // This gets called if another caller "steals" ownership
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private:
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// Structure holding the hidl memory struct and the interface to a shared memory.
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struct SharedMemory {
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hidl_memory hidlMemory;
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sp<IMemory> pIMemory;
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SharedMemory() : hidlMemory(hidl_memory()), pIMemory(nullptr){};
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SharedMemory(hidl_memory hidlMem, sp<IMemory> pIMem)
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: hidlMemory(hidlMem), pIMemory(pIMem) {}
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bool IsValid() { return (pIMemory.get() != nullptr && hidlMemory.valid()); }
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void clear() {
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hidlMemory = hidl_memory();
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pIMemory.clear();
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}
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};
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// Struct for a data frame record.
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struct DataFrameRecord {
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SharedMemory sharedMemory;
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bool inUse;
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explicit DataFrameRecord(SharedMemory shMem) : sharedMemory(shMem), inUse(false){};
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};
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enum StreamStateValues {
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STOPPED,
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RUNNING,
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STOPPING,
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DEAD,
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};
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EvsUltrasonicsArray(const char* deviceName);
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// These three functions are expected to be called while mAccessLock is held
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bool setAvailableFrames_Locked(unsigned bufferCount);
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unsigned increaseAvailableFrames_Locked(unsigned numToAdd);
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unsigned decreaseAvailableFrames_Locked(unsigned numToRemove);
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void generateDataFrames();
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SharedMemory allocateAndMapSharedMemory();
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UltrasonicsArrayDesc mArrayDesc = {}; // The properties of this ultrasonic array.
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std::thread mCaptureThread; // The thread we'll use to synthesize frames
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sp<IEvsUltrasonicsArrayStream> mStream = nullptr; // The callback used to deliver each frame
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sp<IAllocator> mShmemAllocator = nullptr; // Shared memory allocator.
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std::mutex mAccessLock;
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std::vector<DataFrameRecord> mDataFrames GUARDED_BY(mAccessLock); // Shared memory buffers.
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unsigned mFramesAllowed GUARDED_BY(mAccessLock); // How many buffers are we currently using.
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unsigned mFramesInUse GUARDED_BY(mAccessLock); // How many buffers are currently outstanding.
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StreamStateValues mStreamState GUARDED_BY(mAccessLock);
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};
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} // namespace implementation
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} // namespace V1_1
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} // namespace evs
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} // namespace automotive
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} // namespace hardware
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} // namespace android
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#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSULTRASONICSARRAY_H
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