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 <functional> 20 21 #include <json/json.h> 22 23 namespace cuttlefish { 24 namespace webrtc_streaming { 25 26 // The ConnectionObserver is the boundary between device specific code and 27 // general WebRTC streaming code. Device specific code should be left to 28 // implementations of this class while code that could be shared between any 29 // device using this streaming library should remain in the library. 30 // For example: 31 // - Parsing JSON messages to obtain input events is common to all android 32 // devices and should stay in the library. 33 // - Sending input events to the device by writing to a socket is cuttlefish 34 // specific and should be done in the ConnectionObserver implementation. Other 35 // devices could choose to send those events over ADB for example. A good rule 36 // of thumb is: if it was encoded client side in cf_webrtc.js it should be 37 // decoded in the library. 38 class ConnectionObserver { 39 public: 40 ConnectionObserver() = default; 41 virtual ~ConnectionObserver() = default; 42 43 virtual void OnConnected() = 0; 44 45 virtual void OnTouchEvent(const std::string& display_label, int x, int y, 46 bool down) = 0; 47 virtual void OnMultiTouchEvent(const std::string& label, Json::Value id, 48 Json::Value slot, Json::Value x, Json::Value y, 49 bool down, int size) = 0; 50 51 virtual void OnKeyboardEvent(uint16_t keycode, bool down) = 0; 52 53 virtual void OnAdbChannelOpen( 54 std::function<bool(const uint8_t*, size_t)> adb_message_sender) = 0; 55 virtual void OnAdbMessage(const uint8_t* msg, size_t size) = 0; 56 57 virtual void OnControlChannelOpen( 58 std::function<bool(const Json::Value)> control_message_sender) = 0; 59 virtual void OnLidStateChange(bool lid_open) = 0; 60 virtual void OnHingeAngleChange(int hinge_angle) = 0; 61 virtual void OnPowerButton(bool button_down) = 0; 62 virtual void OnBackButton(bool button_down) = 0; 63 virtual void OnHomeButton(bool button_down) = 0; 64 virtual void OnMenuButton(bool button_down) = 0; 65 virtual void OnVolumeDownButton(bool button_down) = 0; 66 virtual void OnVolumeUpButton(bool button_down) = 0; 67 virtual void OnCustomActionButton(const std::string& command, 68 const std::string& button_state) = 0; 69 70 virtual void OnCameraControlMsg(const Json::Value& msg) = 0; 71 72 virtual void OnBluetoothChannelOpen( 73 std::function<bool(const uint8_t*, size_t)> bluetooth_message_sender) = 0; 74 virtual void OnBluetoothMessage(const uint8_t* msg, size_t size) = 0; 75 virtual void OnLocationChannelOpen( 76 std::function<bool(const uint8_t*, size_t)> location_message_sender) = 0; 77 virtual void OnLocationMessage(const uint8_t* msg, size_t size) = 0; 78 79 virtual void OnKmlLocationsChannelOpen( 80 std::function<bool(const uint8_t*, size_t)> 81 kml_locations_message_sender) = 0; 82 83 virtual void OnGpxLocationsChannelOpen( 84 std::function<bool(const uint8_t*, size_t)> 85 gpx_locations_message_sender) = 0; 86 virtual void OnKmlLocationsMessage(const uint8_t* msg, size_t size) = 0; 87 virtual void OnGpxLocationsMessage(const uint8_t* msg, size_t size) = 0; 88 89 virtual void OnCameraData(const std::vector<char>& data) = 0; 90 }; 91 92 class ConnectionObserverFactory { 93 public: 94 virtual ~ConnectionObserverFactory() = default; 95 // Called when a new connection is requested 96 virtual std::shared_ptr<ConnectionObserver> CreateObserver() = 0; 97 }; 98 99 } // namespace webrtc_streaming 100 } // namespace cuttlefish 101