1 /*
2  * Copyright (C) 2020 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 #pragma once
18 
19 #include <android/hardware/automotive/sv/1.0/types.h>
20 #include <android/hardware/automotive/sv/1.0/ISurroundViewStream.h>
21 #include <android/hardware/automotive/sv/1.0/ISurroundView2dSession.h>
22 #include <hidl/MQDescriptor.h>
23 #include <hidl/Status.h>
24 
25 #include <thread>
26 
27 using namespace ::android::hardware::automotive::sv::V1_0;
28 using ::android::hardware::Return;
29 using ::android::hardware::Void;
30 using ::android::hardware::hidl_vec;
31 using ::android::sp;
32 using ::std::mutex;
33 
34 namespace android {
35 namespace hardware {
36 namespace automotive {
37 namespace sv {
38 namespace V1_0 {
39 namespace implementation {
40 
41 class SurroundView2dSession : public ISurroundView2dSession {
42 public:
43     SurroundView2dSession();
44 
45     // Methods from ::android::hardware::automotive::sv::V1_0::ISurroundViewSession.
46     Return<SvResult> startStream(
47         const sp<ISurroundViewStream>& stream) override;
48     Return<void> stopStream() override;
49     Return<void> doneWithFrames(const SvFramesDesc& svFramesDesc) override;
50 
51     // Methods from ISurroundView2dSession follow.
52     Return<void> get2dMappingInfo(get2dMappingInfo_cb _hidl_cb) override;
53     Return<SvResult> set2dConfig(const Sv2dConfig& sv2dConfig) override;
54     Return<void> get2dConfig(get2dConfig_cb _hidl_cb) override;
55     Return<void> projectCameraPoints(
56         const hidl_vec<Point2dInt>& points2dCamera,
57         const hidl_string& cameraId,
58         projectCameraPoints_cb _hidl_cb) override;
59 
60     // TODO(tanmayp): Make private and add set/get method.
61     // Stream subscribed for the session.
62     sp<ISurroundViewStream> mStream;
63 
64 private:
65     void generateFrames();
66 
67     enum StreamStateValues {
68         STOPPED,
69         RUNNING,
70         STOPPING,
71         DEAD,
72     };
73     StreamStateValues mStreamState;
74 
75     Sv2dConfig mConfig;
76 
77     std::thread mCaptureThread; // The thread we'll use to synthesize frames
78 
79     struct FramesRecord {
80         SvFramesDesc frames;
81         bool inUse = false;
82     };
83 
84     FramesRecord framesRecord;
85 
86     // Synchronization necessary to deconflict mCaptureThread from the main service thread
87     std::mutex mAccessLock;
88 
89     std::vector<std::string> mEvsCameraIds;
90 };
91 
92 }  // namespace implementation
93 }  // namespace V1_0
94 }  // namespace sv
95 }  // namespace automotive
96 }  // namespace hardware
97 }  // namespace android
98 
99