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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <functional>
#include <json/json.h>
#include "common/libs/utils/result.h"
namespace cuttlefish {
namespace webrtc_streaming {
// The ConnectionObserver is the boundary between device specific code and
// general WebRTC streaming code. Device specific code should be left to
// implementations of this class while code that could be shared between any
// device using this streaming library should remain in the library.
// For example:
// - Parsing JSON messages to obtain input events is common to all android
// devices and should stay in the library.
// - Sending input events to the device by writing to a socket is cuttlefish
// specific and should be done in the ConnectionObserver implementation. Other
// devices could choose to send those events over ADB for example. A good rule
// of thumb is: if it was encoded client side in cf_webrtc.js it should be
// decoded in the library.
class ConnectionObserver {
public:
ConnectionObserver() = default;
virtual ~ConnectionObserver() = default;
virtual void OnConnected() = 0;
virtual Result<void> OnTouchEvent(const std::string& device_label, int x,
int y, bool down) = 0;
virtual Result<void> OnMultiTouchEvent(const std::string& label,
Json::Value id, Json::Value slot,
Json::Value x, Json::Value y,
bool down, int size) = 0;
virtual Result<void> OnKeyboardEvent(uint16_t keycode, bool down) = 0;
virtual Result<void> OnWheelEvent(int pixels) = 0;
virtual void OnAdbChannelOpen(
std::function<bool(const uint8_t*, size_t)> adb_message_sender) = 0;
virtual void OnAdbMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnControlChannelOpen(
std::function<bool(const Json::Value)> control_message_sender) = 0;
virtual Result<void> OnLidStateChange(bool lid_open) = 0;
virtual void OnHingeAngleChange(int hinge_angle) = 0;
virtual Result<void> OnPowerButton(bool button_down) = 0;
virtual Result<void> OnBackButton(bool button_down) = 0;
virtual Result<void> OnHomeButton(bool button_down) = 0;
virtual Result<void> OnMenuButton(bool button_down) = 0;
virtual Result<void> OnVolumeDownButton(bool button_down) = 0;
virtual Result<void> OnVolumeUpButton(bool button_down) = 0;
virtual void OnCustomActionButton(const std::string& command,
const std::string& button_state) = 0;
virtual void OnCameraControlMsg(const Json::Value& msg) = 0;
virtual void OnDisplayControlMsg(const Json::Value& msg) = 0;
virtual void OnBluetoothChannelOpen(
std::function<bool(const uint8_t*, size_t)> bluetooth_message_sender) = 0;
virtual void OnBluetoothMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnSensorsChannelOpen(
std::function<bool(const uint8_t*, size_t)> sensors_message_sender) = 0;
virtual void OnSensorsMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnSensorsChannelClosed() = 0;
virtual void OnLightsChannelOpen(
std::function<bool(const Json::Value&)> lights_message_sender) = 0;
virtual void OnLightsChannelClosed() = 0;
virtual void OnLocationChannelOpen(
std::function<bool(const uint8_t*, size_t)> location_message_sender) = 0;
virtual void OnLocationMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnKmlLocationsChannelOpen(
std::function<bool(const uint8_t*, size_t)>
kml_locations_message_sender) = 0;
virtual void OnGpxLocationsChannelOpen(
std::function<bool(const uint8_t*, size_t)>
gpx_locations_message_sender) = 0;
virtual void OnKmlLocationsMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnGpxLocationsMessage(const uint8_t* msg, size_t size) = 0;
virtual void OnCameraData(const std::vector<char>& data) = 0;
};
class ConnectionObserverFactory {
public:
virtual ~ConnectionObserverFactory() = default;
// Called when a new connection is requested
virtual std::shared_ptr<ConnectionObserver> CreateObserver() = 0;
};
} // namespace webrtc_streaming
} // namespace cuttlefish
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