1 /*
2  * Copyright (C) 2018 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_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H
18 #define ANDROID_HARDWARE_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H
19 
20 #include <string>
21 #include <unordered_map>
22 #include <unordered_set>
23 #include "utils/Mutex.h"
24 #include "utils/Thread.h"
25 #include <android/hardware/camera/provider/2.4/ICameraProvider.h>
26 #include <hidl/Status.h>
27 #include <hidl/MQDescriptor.h>
28 #include "ExternalCameraUtils.h"
29 
30 namespace android {
31 namespace hardware {
32 namespace camera {
33 namespace provider {
34 namespace V2_4 {
35 namespace implementation {
36 
37 using ::android::hardware::camera::common::V1_0::CameraDeviceStatus;
38 using ::android::hardware::camera::common::V1_0::Status;
39 using ::android::hardware::camera::common::V1_0::VendorTagSection;
40 using ::android::hardware::camera::external::common::ExternalCameraConfig;
41 using ::android::hardware::camera::provider::V2_4::ICameraProvider;
42 using ::android::hardware::camera::provider::V2_4::ICameraProviderCallback;
43 using ::android::hardware::Return;
44 using ::android::hardware::Void;
45 using ::android::hardware::hidl_vec;
46 using ::android::hardware::hidl_string;
47 using ::android::sp;
48 using ::android::Mutex;
49 
50 struct ExternalCameraProvider : public ICameraProvider {
51     ExternalCameraProvider();
52     ~ExternalCameraProvider();
53 
54     // Methods from ::android::hardware::camera::provider::V2_4::ICameraProvider follow.
55     Return<Status> setCallback(const sp<ICameraProviderCallback>& callback) override;
56 
57     Return<void> getVendorTags(getVendorTags_cb _hidl_cb) override;
58 
59     Return<void> getCameraIdList(getCameraIdList_cb _hidl_cb) override;
60 
61     Return<void> isSetTorchModeSupported(isSetTorchModeSupported_cb _hidl_cb) override;
62 
63     Return<void> getCameraDeviceInterface_V1_x(
64             const hidl_string&,
65             getCameraDeviceInterface_V1_x_cb) override;
66     Return<void> getCameraDeviceInterface_V3_x(
67             const hidl_string&,
68             getCameraDeviceInterface_V3_x_cb) override;
69 
70 private:
71 
72     void addExternalCamera(const char* devName);
73 
74     void deviceAdded(const char* devName);
75 
76     void deviceRemoved(const char* devName);
77 
78     class HotplugThread : public android::Thread {
79     public:
80         HotplugThread(ExternalCameraProvider* parent);
81         ~HotplugThread();
82 
83         virtual bool threadLoop() override;
84 
85     private:
86         ExternalCameraProvider* mParent = nullptr;
87         const std::unordered_set<std::string> mInternalDevices;
88 
89         int mINotifyFD = -1;
90         int mWd = -1;
91     };
92 
93     Mutex mLock;
94     sp<ICameraProviderCallback> mCallbacks = nullptr;
95     std::unordered_map<std::string, CameraDeviceStatus> mCameraStatusMap; // camera id -> status
96     const ExternalCameraConfig mCfg;
97     HotplugThread mHotPlugThread;
98 };
99 
100 
101 
102 }  // namespace implementation
103 }  // namespace V2_4
104 }  // namespace provider
105 }  // namespace camera
106 }  // namespace hardware
107 }  // namespace android
108 
109 #endif  // ANDROID_HARDWARE_CAMERA_PROVIDER_V2_4_EXTCAMERAPROVIDER_H
110