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_1_EVSDISPLAY_H
18 #define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSDISPLAY_H
19 
20 #include <android/hardware/automotive/evs/1.1/IEvsDisplay.h>
21 #include <android/frameworks/automotive/display/1.0/IAutomotiveDisplayProxyService.h>
22 #include <ui/GraphicBuffer.h>
23 
24 using ::android::hardware::automotive::evs::V1_1::IEvsDisplay;
25 using ::android::hardware::automotive::evs::V1_0::DisplayDesc;
26 using ::android::hardware::automotive::evs::V1_0::DisplayState;
27 using ::android::hardware::automotive::evs::V1_0::EvsResult;
28 using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
29 using android::frameworks::automotive::display::V1_0::IAutomotiveDisplayProxyService;
30 
31 namespace android {
32 namespace hardware {
33 namespace automotive {
34 namespace evs {
35 namespace V1_1 {
36 namespace implementation {
37 
38 
39 class EvsDisplay : public IEvsDisplay {
40 public:
41     // Methods from ::android::hardware::automotive::evs::V1_0::IEvsDisplay follow.
42     Return<void>         getDisplayInfo(getDisplayInfo_cb _hidl_cb)  override;
43     Return<EvsResult>    setDisplayState(DisplayState state)  override;
44     Return<DisplayState> getDisplayState()  override;
45     Return<void>         getTargetBuffer(getTargetBuffer_cb _hidl_cb)  override;
46     Return<EvsResult>    returnTargetBufferForDisplay(const BufferDesc_1_0& buffer)  override;
47 
48     // Methods from ::android::hardware::automotive::evs::V1_1::IEvsDisplay follow.
49     Return<void>         getDisplayInfo_1_1(getDisplayInfo_1_1_cb _info_cb) override;
50 
51     // Implementation details
52     EvsDisplay();
53     EvsDisplay(sp<IAutomotiveDisplayProxyService> pDisplayProxy, uint64_t displayId);
54     virtual ~EvsDisplay() override;
55 
56     void forceShutdown();   // This gets called if another caller "steals" ownership of the display
57     Return<EvsResult> returnTargetBufferForDisplayImpl(const uint32_t bufferId,
58                                                        const buffer_handle_t memHandle);
59 
60 private:
61     DisplayDesc     mInfo           = {};
62     BufferDesc_1_0  mBuffer         = {};       // A graphics buffer into which we'll store images
63 
64     bool            mFrameBusy      = false;    // A flag telling us our buffer is in use
65     DisplayState    mRequestedState = DisplayState::NOT_VISIBLE;
66 
67     std::mutex      mAccessLock;
68 
69     sp<IAutomotiveDisplayProxyService> mDisplayProxy;
70     uint64_t                           mDisplayId;
71 };
72 
73 } // namespace implementation
74 } // namespace V1_1
75 } // namespace evs
76 } // namespace automotive
77 } // namespace hardware
78 } // namespace android
79 
80 #endif  // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSDISPLAY_H
81