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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 <memory>
#include <mutex>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "host/libs/config/custom_actions.h"
#include "host/frontend/webrtc/lib/audio_sink.h"
#include "host/frontend/webrtc/lib/audio_source.h"
#include "host/frontend/webrtc/lib/camera_controller.h"
#include "host/frontend/webrtc/lib/connection_observer.h"
#include "host/frontend/webrtc/lib/local_recorder.h"
#include "host/frontend/webrtc/lib/video_sink.h"
#include "host/frontend/webrtc/lib/server_connection.h"
namespace cuttlefish {
namespace webrtc_streaming {
class ClientHandler;
struct StreamerConfig {
// The id with which to register with the operator server.
std::string device_id;
// The port on which the client files are being served
int client_files_port;
ServerConfig operator_server;
// The port ranges webrtc is allowed to use.
// [0,0] means all ports
std::pair<uint16_t, uint16_t> udp_port_range = {15550, 15558};
std::pair<uint16_t, uint16_t> tcp_port_range = {15550, 15558};
};
class OperatorObserver {
public:
virtual ~OperatorObserver() = default;
// Called when the websocket connection with the operator is established.
virtual void OnRegistered() = 0;
// Called when the websocket connection with the operator is closed.
virtual void OnClose() = 0;
// Called when an error is encountered in the connection to the operator.
virtual void OnError() = 0;
};
class Streamer {
public:
// The observer_factory will be used to create an observer for every new
// client connection. Unregister() needs to be called to stop accepting
// connections.
static std::unique_ptr<Streamer> Create(
const StreamerConfig& cfg,
std::shared_ptr<ConnectionObserverFactory> factory);
~Streamer() = default;
std::shared_ptr<VideoSink> AddDisplay(const std::string& label, int width,
int height, int dpi,
bool touch_enabled);
void SetHardwareSpec(std::string key, std::string value);
template <typename V>
void SetHardwareSpec(std::string key, V value) {
SetHardwareSpec(key, std::to_string(value));
}
std::shared_ptr<AudioSink> AddAudioStream(const std::string& label);
// Grants access to streams originating on the client side. If there are
// multiple streams (either because one client sends more than one or there
// are several clients) the audio will be mixed and provided as a single
// stream here.
std::shared_ptr<AudioSource> GetAudioSource();
CameraController* AddCamera(unsigned int port, unsigned int cid);
// Add a custom button to the control panel.
void AddCustomControlPanelButton(const std::string& command,
const std::string& title,
const std::string& icon_name);
void AddCustomControlPanelButtonWithShellCommand(
const std::string& command, const std::string& title,
const std::string& icon_name, const std::string& shell_command);
void AddCustomControlPanelButtonWithDeviceStates(
const std::string& command, const std::string& title,
const std::string& icon_name,
const std::vector<DeviceState>& device_states);
// Register with the operator.
void Register(std::weak_ptr<OperatorObserver> operator_observer);
void Unregister();
void RecordDisplays(LocalRecorder& recorder);
private:
/*
* Private Implementation idiom.
* https://en.cppreference.com/w/cpp/language/pimpl
*/
class Impl;
Streamer(std::unique_ptr<Impl> impl);
std::shared_ptr<Impl> impl_;
};
} // namespace webrtc_streaming
} // namespace cuttlefish
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