428 lines
15 KiB
JavaScript
428 lines
15 KiB
JavaScript
/**
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* 状态管理
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* 使用简单的 Observable 模式，可替换为 Redux/Vuex/Pinia
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*/
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import { mockCallSession, mockMessages } from './models.js';
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import { Signaling, WebSocketSignaling } from "../../module/signaling.js";// 信令管理
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import { RenderStreaming } from "../../module/renderstreaming.js"; // WebRTC连接管理
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import { getServerConfig, getRTCConfiguration } from "../js/config.js";//服务器配置和RTC配置
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import { showNotification } from './utils.js'; // 导入通知函数
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// 默认视频流尺寸
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const defaultStreamWidth = 1280;
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const defaultStreamHeight = 720;
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class CallStateManager {
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constructor() {
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const renderstreaming = null; // WebRTC连接管理实例
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const useWebSocket = null; // 是否使用WebSocket信令
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const connectionId = null; // 连接ID
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// 核心状态
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this.state = {
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session: {
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...mockCallSession,
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status: 'idle' // 初始状态为空闲
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},
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messages: [...mockMessages],
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isSidebarOpen: false,
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unreadCount: 0,
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localStream: null, // MediaStream 对象
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remoteStream: null // MediaStream 对象
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};
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// 监听器数组
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this.listeners = [];
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}
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// 订阅状态变化
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subscribe(callback) {
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this.listeners.push(callback);
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return () => {
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this.listeners = this.listeners.filter(cb => cb !== callback);
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};
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}
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// 通知所有监听器
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notify(changes) {
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this.listeners.forEach(cb => cb(this.state, changes));
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}
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// 初始化
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async init() {
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// 启动通话时长计时器
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this.durationInterval = setInterval(() => {
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this.state.session.duration++;
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this.notify({ type: 'DURATION_UPDATE', duration: this.state.session.duration });
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}, 1000);
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// 初始化配置
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await this.setupConfig();
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// 获取本地摄像头视频流
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await this.getLocalStream();
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// 模拟远端音频活动 (实际应由 WebRTC VAD 检测触发)
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//this.simulateRemoteActivity();
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// 模拟网络质量变化
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this.simulateNetworkChange();
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}
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async setupConfig() {
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const res = await getServerConfig();
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this.useWebSocket = res.useWebSocket;
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}
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// 获取本地摄像头视频流
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async getLocalStream() {
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try {
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console.log('Requesting camera permission...');
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// 检查浏览器是否支持getUserMedia
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if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
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console.error('getUserMedia is not supported');
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throw new Error('getUserMedia is not supported');
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}
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// 请求摄像头权限并获取媒体流
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const stream = await navigator.mediaDevices.getUserMedia({
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video: true,
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audio: true
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});
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console.log('Stream obtained successfully:', stream);
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console.log('Video tracks:', stream.getVideoTracks());
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console.log('Audio tracks:', stream.getAudioTracks());
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this.state.localStream = stream;
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this.state.session.localUser.mediaState.video = true;
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this.state.session.localUser.mediaState.audio = true;
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console.log('Local stream stored, notifying UI...');
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// 先通知视频流已获取
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this.notify({ type: 'LOCAL_STREAM_OBTAINED', stream });
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// 再通知媒体状态变化
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this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType: 'video', value: true });
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this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType: 'audio', value: true });
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// 发送媒体状态到服务器
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this.emitMediaStateChange();
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} catch (error) {
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console.error('Error getting local stream:', error);
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// 如果获取视频失败，保持视频关闭状态
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this.state.session.localUser.mediaState.video = false;
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this.state.session.localUser.mediaState.audio = false;
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// 通知媒体状态变化
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this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType: 'video', value: false });
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this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType: 'audio', value: false });
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}
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}
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// 更新本地媒体状态
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async updateLocalMedia(mediaType, value) {
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// 如果是开启视频，重新获取摄像头资源
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if (mediaType === 'video' && value) {
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if (this.state.localStream) {
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this.state.localStream = null;
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}
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//if(this.state.localStream.getVideoTracks().length==0){
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// 请求摄像头权限并获取媒体流
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this.state.localStream = await navigator.mediaDevices.getUserMedia({
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video: true,
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audio: true
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});
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// }
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await this.getLocalStream();
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} else {
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// 直接更新媒体状态
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this.state.session.localUser.mediaState[mediaType] = value;
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this.notify({ type: 'LOCAL_MEDIA_CHANGE', mediaType, value });
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// 发送媒体状态到服务器
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this.emitMediaStateChange();
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}
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// 如果是关闭视频，释放摄像头资源
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if (mediaType === 'video' && !value && this.state.localStream) {
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this.state.localStream.getTracks().forEach(track => {
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if (track.kind === 'video') {
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track.stop();
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}
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});
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}
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// 如果是音频状态变化，控制本地音频轨道
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if (mediaType === 'audio' && this.state.localStream) {
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this.state.localStream.getTracks().forEach(track => {
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if (track.kind === 'audio') {
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track.enabled = value;
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}
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});
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}
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}
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/**
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* 设置WebRTC连接
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* @async
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* @returns {Promise<void>}
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*/
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async setUp(connectionId) {
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//TODO
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this.connectionId = connectionId; // 获取连接ID
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// 设置状态为连接中
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this.state.session.status = 'connecting';
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this.notify({ type: 'CALL_STATUS_CHANGE', status: 'connecting' });
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// 确保本地流已经初始化
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if (!this.state.localStream) {
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console.log('Local stream not available, waiting for initialization...');
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// 等待localStream初始化
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await new Promise((resolve) => {
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const checkStream = () => {
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if (this.state.localStream) {
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resolve();
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} else {
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setTimeout(checkStream, 100);
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}
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};
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checkStream();
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});
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}
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// 创建信令实例
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const signaling = this.useWebSocket ? new WebSocketSignaling() : new Signaling();
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const config = getRTCConfiguration(); // 获取RTC配置
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// 优化RTC配置，确保支持高分辨率
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config.peerConnectionOptions = {
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optional: [
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{ googCpuOveruseDetection: false }, // 禁用CPU过度使用检测
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{ googScreencastMinBitrate: 3000 } // 设置最小比特率
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]
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};
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this.renderstreaming = new RenderStreaming(signaling, config); // 创建WebRTC连接管理实例
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// 连接建立回调
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this.renderstreaming.onConnect = () => {
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// 连接建立后，更新状态为ongoing
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this.state.session.status = 'ongoing';
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this.notify({ type: 'CALL_STATUS_CHANGE', status: 'ongoing' });
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if (this.state.localStream) {
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const tracks = this.state.localStream.getTracks(); // 获取本地媒体轨道
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for (const track of tracks) {
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this.renderstreaming.addTransceiver(track, { direction: 'sendonly' }); // 添加发送轨道
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}
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this.setCodecPreferences(); // 设置编解码器偏好
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this.showStatsMessage(); // 显示统计信息
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} else {
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console.error('Local stream is not available');
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showNotification('本地视频流不可用', 'error');
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}
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};
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// 连接断开回调
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this.renderstreaming.onDisconnect = () => {
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this.hangUp(); // 挂断连接
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};
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// 轨道事件回调
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this.renderstreaming.onTrackEvent = (data) => {
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const direction = data.transceiver.direction;
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if (direction == "sendrecv" || direction == "recvonly") {
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if (this.state.remoteStream == null) {
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this.state.remoteStream = new MediaStream();
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}
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this.state.remoteStream.addTrack(data.track);
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// 通知UI远程流已更新
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this.notify({ type: 'REMOTE_STREAM_OBTAINED', stream: this.state.remoteStream });
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}
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};
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// 启动WebRTC连接
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await this.renderstreaming.start();
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await this.renderstreaming.createConnection(connectionId);
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}
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/**
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* 挂断WebRTC连接
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* @async
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* @returns {Promise<void>}
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*/
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async hangUp() {
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this.clearStatsMessage(); // 清除统计信息
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this.messageDiv.style.display = 'block';
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this.messageDiv.innerText = `Disconnect peer on ${this.connectionId}.`;
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// 删除连接并停止WebRTC
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await this.renderstreaming.deleteConnection();
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await this.renderstreaming.stop();
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this.renderstreaming = null;
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this.remoteVideo.srcObject = null; // 清除远程视频源
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this.connectionId = null;
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// 启用编解码器选择
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if (this.supportsSetCodecPreferences) {
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this.codecPreferences.disabled = false;
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}
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}
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/**
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* 设置编解码器偏好
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*/
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setCodecPreferences() {
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/** @type {RTCRtpCodecCapability[] | null} */
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let selectedCodecs = null;
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if (this.supportsSetCodecPreferences) {
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const preferredCodec = this.codecPreferences.options[this.codecPreferences.selectedIndex];
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if (preferredCodec.value !== '') {
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const [mimeType, sdpFmtpLine] = preferredCodec.value.split(' ');
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const { codecs } = RTCRtpSender.getCapabilities('video');
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const selectedCodecIndex = codecs.findIndex(c => c.mimeType === mimeType && c.sdpFmtpLine === sdpFmtpLine);
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const selectCodec = codecs[selectedCodecIndex];
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selectedCodecs = [selectCodec];
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}
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}
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if (selectedCodecs == null) {
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return;
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}
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// 获取视频收发器并设置编解码器偏好
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const transceivers = this.renderstreaming.getTransceivers().filter(t => t.receiver.track.kind == "video");
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if (transceivers && transceivers.length > 0) {
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transceivers.forEach(t => t.setCodecPreferences(selectedCodecs));
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}
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}
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// 更新远端媒体状态 (由 WebSocket 消息触发)
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updateRemoteMedia(mediaState) {
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this.state.session.remoteUser.mediaState = {
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...this.state.session.remoteUser.mediaState,
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...mediaState
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};
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this.notify({ type: 'REMOTE_MEDIA_CHANGE', mediaState });
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}
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// 添加消息
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addMessage(message) {
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this.state.messages.push(message);
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// 如果侧边栏关闭且不是自己发的，增加未读
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if (!this.state.isSidebarOpen && !message.isSelf) {
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this.state.unreadCount++;
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}
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this.notify({ type: 'NEW_MESSAGE', message, unreadCount: this.state.unreadCount });
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}
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// 切换侧边栏
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toggleSidebar() {
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this.state.isSidebarOpen = !this.state.isSidebarOpen;
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if (this.state.isSidebarOpen) {
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this.state.unreadCount = 0;
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}
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this.notify({ type: 'SIDEBAR_TOGGLE', isOpen: this.state.isSidebarOpen });
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}
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// 结束通话
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endCall() {
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clearInterval(this.durationInterval);
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this.state.session.status = 'ended';
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this.notify({ type: 'CALL_ENDED' });
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// 发送结束通话请求到服务器
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// [API_CALL: POST /api/call/:callId/leave]
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// [WEBSOCKET_EMIT: leave-call]
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}
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// 加入通话
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async joinCall(connectionId) {
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this.state.session.status = 'connecting';
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this.notify({ type: 'CALL_STATUS_CHANGE', status: 'connecting' });
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showNotification(`正在加入通话 (${connectionId})`);
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// 初始化
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await this.init();
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// 保存连接ID
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this.connectionId = connectionId;
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}
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// 创建通话
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async createCall() {
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this.state.session.status = 'connecting';
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this.notify({ type: 'CALL_STATUS_CHANGE', status: 'connecting' });
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showNotification('正在创建通话...');
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// 初始化
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await this.init();
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}
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// 模拟远端活动 (开发测试用)
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simulateRemoteActivity() {
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setInterval(() => {
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if (Math.random() > 0.7) {
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const isSpeaking = Math.random() > 0.5;
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this.updateRemoteMedia({ isSpeaking });
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}
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}, 800);
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}
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// 模拟网络质量变化 (开发测试用)
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simulateNetworkChange() {
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const qualities = ['excellent', 'good', 'fair', 'poor'];
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setInterval(() => {
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if (Math.random() > 0.8) {
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const quality = qualities[Math.floor(Math.random() * qualities.length)];
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this.state.session.remoteUser.networkQuality = quality;
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this.notify({ type: 'NETWORK_CHANGE', quality });
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}
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}, 5000);
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}
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// 发送媒体状态到服务器
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emitMediaStateChange() {
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const payload = {
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userId: this.state.session.localUser.id,
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...this.state.session.localUser.mediaState
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};
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console.log('[WebSocket Emit] media-state-changed:', payload);
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// socket.emit('media-state-changed', payload);
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}
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// 显示统计信息
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showStatsMessage() {
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console.log('Showing stats message');
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// 这里可以添加显示统计信息的逻辑
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}
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// 清除统计信息
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clearStatsMessage() {
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console.log('Clearing stats message');
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// 这里可以添加清除统计信息的逻辑
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}
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// Getters
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getState() { return this.state; }
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getLocalUser() { return this.state.session.localUser; }
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getRemoteUser() { return this.state.session.remoteUser; }
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getMessages() { return this.state.messages; }
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getConnectionId() { return this.connectionId; }
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}
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// 创建单例实例
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const store = new CallStateManager();
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// 页面卸载前清理
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window.addEventListener('beforeunload', async () => {
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if (!store.renderstreaming)
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return;
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await store.renderstreaming.stop(); // 停止WebRTC连接
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}, true);
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export default store;
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