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_EVSDISPLAY_H
18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSDISPLAY_H
19 
20 #include <android/hardware/automotive/evs/1.0/IEvsDisplay.h>
21 #include <ui/GraphicBuffer.h>
22 
23 namespace android {
24 namespace hardware {
25 namespace automotive {
26 namespace evs {
27 namespace V1_0 {
28 namespace implementation {
29 
30 
31 class EvsDisplay : public IEvsDisplay {
32 public:
33     // Methods from ::android::hardware::automotive::evs::V1_0::IEvsDisplay follow.
34     Return<void> getDisplayInfo(getDisplayInfo_cb _hidl_cb)  override;
35     Return<EvsResult> setDisplayState(DisplayState state)  override;
36     Return<DisplayState> getDisplayState()  override;
37     Return<void> getTargetBuffer(getTargetBuffer_cb _hidl_cb)  override;
38     Return<EvsResult> returnTargetBufferForDisplay(const BufferDesc& buffer)  override;
39 
40     // Implementation details
41     EvsDisplay();
42     virtual ~EvsDisplay() override;
43 
44     void forceShutdown();   // This gets called if another caller "steals" ownership of the display
45 
46 private:
47     DisplayDesc     mInfo           = {};
48     BufferDesc      mBuffer         = {};       // A graphics buffer into which we'll store images
49 
50     bool            mFrameBusy      = false;    // A flag telling us our buffer is in use
51     DisplayState    mRequestedState = DisplayState::NOT_VISIBLE;
52 
53     std::mutex      mAccessLock;
54 };
55 
56 } // namespace implementation
57 } // namespace V1_0
58 } // namespace evs
59 } // namespace automotive
60 } // namespace hardware
61 } // namespace android
62 
63 #endif  // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_EVSDISPLAY_H
64