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113 lines
3.9 KiB
113 lines
3.9 KiB
/*
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* Copyright (C) 2016 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_0_EVSCAMERA_H
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#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSCAMERA_H
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#include <android/hardware/automotive/evs/1.0/types.h>
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#include <android/hardware/automotive/evs/1.0/IEvsCamera.h>
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#include <ui/GraphicBuffer.h>
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#include <thread>
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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_0 {
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namespace implementation {
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// From EvsEnumerator.h
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class EvsEnumerator;
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class EvsCamera : public IEvsCamera {
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public:
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// Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow.
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Return<void> getCameraInfo(getCameraInfo_cb _hidl_cb) override;
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Return <EvsResult> setMaxFramesInFlight(uint32_t bufferCount) override;
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Return <EvsResult> startVideoStream(const ::android::sp<IEvsCameraStream>& stream) override;
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Return<void> doneWithFrame(const BufferDesc& buffer) override;
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Return<void> stopVideoStream() override;
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Return <int32_t> getExtendedInfo(uint32_t opaqueIdentifier) override;
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Return <EvsResult> setExtendedInfo(uint32_t opaqueIdentifier, int32_t opaqueValue) override;
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// Implementation details
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EvsCamera(const char *id);
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virtual ~EvsCamera() override;
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void forceShutdown(); // This gets called if another caller "steals" ownership of the camera
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const CameraDesc& getDesc() { return mDescription; };
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static const char kCameraName_Backup[];
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private:
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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 generateFrames();
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void fillTestFrame(const BufferDesc& buff);
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sp<EvsEnumerator> mEnumerator; // The enumerator object that created this camera
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CameraDesc mDescription = {}; // The properties of this camera
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std::thread mCaptureThread; // The thread we'll use to synthesize frames
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uint32_t mWidth = 0; // Horizontal pixel count in the buffers
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uint32_t mHeight = 0; // Vertical pixel count in the buffers
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uint32_t mFormat = 0; // Values from android_pixel_format_t [TODO: YUV? Leave opaque?]
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uint32_t mUsage = 0; // Values from from Gralloc.h
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uint32_t mStride = 0; // Bytes per line in the buffers
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sp <IEvsCameraStream> mStream = nullptr; // The callback used to deliver each frame
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struct BufferRecord {
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buffer_handle_t handle;
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bool inUse;
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explicit BufferRecord(buffer_handle_t h) : handle(h), inUse(false) {};
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};
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std::vector <BufferRecord> mBuffers; // Graphics buffers to transfer images
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unsigned mFramesAllowed; // How many buffers are we currently using
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unsigned mFramesInUse; // How many buffers are currently outstanding
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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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StreamStateValues mStreamState;
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// Synchronization necessary to deconflict mCaptureThread from the main service thread
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std::mutex mAccessLock;
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};
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} // namespace implementation
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} // namespace V1_0
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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_0_EVSCAMERA_H
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