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 #pragma once
17 
18 #include <condition_variable>
19 #include <functional>
20 #include <mutex>
21 #include <thread>
22 #include <vector>
23 
24 #include "common/libs/fs/shared_fd.h"
25 #include "guest/hals/hwcomposer/common/screen_view.h"
26 
27 namespace cuttlefish {
28 
29 class VsocketScreenView : public ScreenView {
30  public:
31   VsocketScreenView();
32   virtual ~VsocketScreenView();
33 
34   void Broadcast(int buffer_id,
35                  const CompositionStats* stats = nullptr) override;
36   void* GetBuffer(int fb_index) override;
37 
38   int32_t x_res() const override;
39   int32_t y_res() const override;
40   int32_t dpi() const override;
41   int32_t refresh_rate() const override;
42 
43   int num_buffers() const override;
44 
45  private:
46   bool ConnectToScreenServer();
47   void GetScreenParameters();
48   void BroadcastLoop();
49 
50   std::vector<char> inner_buffer_;
51   cuttlefish::SharedFD screen_server_;
52   std::thread broadcast_thread_;
53   int current_offset_ = 0;
54   int current_seq_ = 0;
55   std::mutex mutex_;
56   std::condition_variable cond_var_;
57   bool running_ = true;
58   int32_t x_res_{720};
59   int32_t y_res_{1280};
60   int32_t dpi_{160};
61   int32_t refresh_rate_{60};
62 };
63 
64 }  // namespace cuttlefish
65