1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSCAMERAENUMERATOR_H
18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSCAMERAENUMERATOR_H
19 
20 #include <android/hardware/automotive/evs/1.0/IEvsEnumerator.h>
21 #include <android/hardware/automotive/evs/1.0/IEvsCamera.h>
22 
23 #include <list>
24 
25 
26 namespace android {
27 namespace hardware {
28 namespace automotive {
29 namespace evs {
30 namespace V1_0 {
31 namespace implementation {
32 
33 
34 class EvsCamera;    // from EvsCamera.h
35 class EvsDisplay;   // from EvsDisplay.h
36 
37 
38 class EvsEnumerator : public IEvsEnumerator {
39 public:
40     // Methods from ::android::hardware::automotive::evs::V1_0::IEvsEnumerator follow.
41     Return<void> getCameraList(getCameraList_cb _hidl_cb)  override;
42     Return<sp<IEvsCamera>> openCamera(const hidl_string& cameraId) override;
43     Return<void> closeCamera(const ::android::sp<IEvsCamera>& carCamera)  override;
44     Return<sp<IEvsDisplay>> openDisplay()  override;
45     Return<void> closeDisplay(const ::android::sp<IEvsDisplay>& display)  override;
46     Return<DisplayState> getDisplayState()  override;
47 
48     // Implementation details
49     EvsEnumerator();
50 
51 private:
52     // NOTE:  All members values are static so that all clients operate on the same state
53     //        That is to say, this is effectively a singleton despite the fact that HIDL
54     //        constructs a new instance for each client.
55     struct CameraRecord {
56         CameraDesc          desc;
57         wp<EvsCamera>       activeInstance;
58 
CameraRecordCameraRecord59         CameraRecord(const char *cameraId) : desc() { desc.cameraId = cameraId; }
60     };
61     static std::list<CameraRecord> sCameraList;
62 
63     static wp<EvsDisplay>          sActiveDisplay; // Weak pointer. Object destructs if client dies.
64 };
65 
66 } // namespace implementation
67 } // namespace V1_0
68 } // namespace evs
69 } // namespace automotive
70 } // namespace hardware
71 } // namespace android
72 
73 #endif  // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSCAMERAENUMERATOR_H
74