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makinuh commited on Apr 14, 2025

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Create style.css

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Low-Bandwidth Connect</title>
+<script src="https://cdn.tailwindcss.com"></script>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
+<style>
+.video-container {
+position: relative;
+width: 100%;
+padding-bottom: 56.25%; /* 16:9 aspect ratio */
+background-color: #1e293b;
+border-radius: 0.5rem;
+overflow: hidden;
+}
+.video-element {
+position: absolute;
+top: 0;
+left: 0;
+width: 100%;
+height: 100%;
+object-fit: cover;
+}
+.connection-quality {
+position: absolute;
+bottom: 10px;
+right: 10px;
+background-color: rgba(0,0,0,0.5);
+color: white;
+padding: 2px 6px;
+border-radius: 4px;
+font-size: 12px;
+}
+.bandwidth-optimizer {
+transition: all 0.3s ease;
+}
+.bandwidth-optimizer:hover {
+transform: scale(1.05);
+}
+.pulse {
+animation: pulse 2s infinite;
+}
+@keyframes pulse {
+0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7); }
+70% { box-shadow: 0 0 0 10px rgba(74, 222, 128, 0); }
+100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
+}
+</style>
+</head>
+<body class="bg-gray-900 text-gray-100 min-h-screen">
+<div class="container mx-auto px-4 py-8 max-w-6xl">
+<header class="flex justify-between items-center mb-8">
+<div class="flex items-center">
+<i class="fas fa-signal text-green-400 text-2xl mr-3"></i>
+<h1 class="text-2xl font-bold bg-gradient-to-r from-green-400 to-blue-500 bg-clip-text text-transparent">
+LowBand Connect
+</h1>
+</div>
+<div class="flex items-center space-x-4">
+<div class="hidden md:flex items-center space-x-2 text-sm">
+<span class="text-gray-400">Optimized for</span>
+<span class="px-2 py-1 bg-gray-800 rounded-full text-green-400 font-medium">
+<i class="fas fa-wifi mr-1"></i> Low Bandwidth
+</span>
+</div>
+<button id="settingsBtn" class="p-2 rounded-full hover:bg-gray-800 transition">
+<i class="fas fa-cog text-gray-400"></i>
+</button>
+</div>
+</header>
+<main>
+<div class="grid grid-cols-1 lg:grid-cols-2 gap-6 mb-6">
+<!-- Local Video -->
+<div class="video-container">
+<video id="localVideo" class="video-element" autoplay muted></video>
+<div class="connection-quality hidden">
+<i class="fas fa-signal mr-1"></i>
+<span>Local</span>
+</div>
+<div class="absolute top-2 left-2 bg-gray-900 bg-opacity-70 px-2 py-1 rounded text-sm">
+You
+</div>
+</div>
+<!-- Remote Video -->
+<div class="video-container">
+<video id="remoteVideo" class="video-element" autoplay></video>
+<div class="connection-quality hidden">
+<i class="fas fa-signal mr-1"></i>
+<span>Remote</span>
+</div>
+<div class="absolute top-2 left-2 bg-gray-900 bg-opacity-70 px-2 py-1 rounded text-sm">
+Partner
+</div>
+</div>
+</div>
+<div class="flex flex-col md:flex-row justify-between items-center space-y-4 md:space-y-0">
+<div class="flex items-center space-x-2">
+<div class="text-sm bg-gray-800 px-3 py-1 rounded-full">
+<span class="text-gray-400">Connection:</span>
+<span id="connectionStatus" class="font-medium text-yellow-400">Disconnected</span>
+</div>
+<div id="bandwidthIndicator" class="text-sm bg-gray-800 px-3 py-1 rounded-full hidden">
+<span class="text-gray-400">Bandwidth:</span>
+<span id="bandwidthValue" class="font-medium">-- kbps</span>
+</div>
+</div>
+<div class="flex space-x-3">
+<button id="toggleVideoBtn" class="bg-gray-800 hover:bg-gray-700 text-white p-3 rounded-full transition">
+<i class="fas fa-video"></i>
+</button>
+<button id="toggleAudioBtn" class="bg-gray-800 hover:bg-gray-700 text-white p-3 rounded-full transition">
+<i class="fas fa-microphone"></i>
+</button>
+<button id="callBtn" class="bg-green-600 hover:bg-green-700 text-white px-6 py-3 rounded-full font-medium flex items-center pulse">
+<i class="fas fa-phone mr-2"></i>
+<span>Start Call</span>
+</button>
+<button id="endCallBtn" class="bg-red-600 hover:bg-red-700 text-white px-6 py-3 rounded-full font-medium flex items-center hidden">
+<i class="fas fa-phone-slash mr-2"></i>
+<span>End Call</span>
+</button>
+</div>
+</div>
+<!-- Bandwidth Optimizer Panel -->
+<div id="optimizerPanel" class="mt-8 bg-gray-800 rounded-lg p-4 hidden">
+<h3 class="text-lg font-medium mb-4 flex items-center">
+<i class="fas fa-tachometer-alt mr-2 text-blue-400"></i>
+Bandwidth Optimizer
+</h3>
+<div class="grid grid-cols-1 md:grid-cols-3 gap-4">
+<div class="bandwidth-optimizer bg-gray-700 p-4 rounded-lg cursor-pointer" data-preset="low">
+<div class="flex items-center mb-2">
+<i class="fas fa-bicycle text-green-400 mr-2"></i>
+<h4 class="font-medium">Low Bandwidth</h4>
+</div>
+<p class="text-sm text-gray-400">Optimized for slow connections (64-128 kbps)</p>
+<div class="mt-3 text-xs text-gray-500">
+<span>• 160x120 resolution</span><br>
+<span>• 10fps</span><br>
+<span>• Low bitrate</span>
+</div>
+</div>
+<div class="bandwidth-optimizer bg-gray-700 p-4 rounded-lg cursor-pointer" data-preset="medium">
+<div class="flex items-center mb-2">
+<i class="fas fa-car text-yellow-400 mr-2"></i>
+<h4 class="font-medium">Medium Bandwidth</h4>
+</div>
+<p class="text-sm text-gray-400">Balanced quality and bandwidth (128-256 kbps)</p>
+<div class="mt-3 text-xs text-gray-500">
+<span>• 320x240 resolution</span><br>
+<span>• 15fps</span><br>
+<span>• Medium bitrate</span>
+</div>
+</div>
+<div class="bandwidth-optimizer bg-gray-700 p-4 rounded-lg cursor-pointer" data-preset="high">
+<div class="flex items-center mb-2">
+<i class="fas fa-rocket text-red-400 mr-2"></i>
+<h4 class="font-medium">High Bandwidth</h4>
+</div>
+<p class="text-sm text-gray-400">For better connections (256+ kbps)</p>
+<div class="mt-3 text-xs text-gray-500">
+<span>• 640x480 resolution</span><br>
+<span>• 24fps</span><br>
+<span>• High bitrate</span>
+</div>
+</div>
+</div>
+</div>
+</main>
+<!-- Settings Modal -->
+<div id="settingsModal" class="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center hidden z-50">
+<div class="bg-gray-800 rounded-lg p-6 w-full max-w-md">
+<div class="flex justify-between items-center mb-4">
+<h3 class="text-xl font-medium">
+<i class="fas fa-cog mr-2 text-blue-400"></i>
+Settings
+</h3>
+<button id="closeSettingsBtn" class="text-gray-400 hover:text-white">
+<i class="fas fa-times"></i>
+</button>
+</div>
+<div class="space-y-4">
+<div>
+<label class="block text-sm font-medium mb-1">Video Source</label>
+<select id="videoSource" class="w-full bg-gray-700 border border-gray-600 rounded px-3 py-2 text-sm">
+<option value="">Default Camera</option>
+</select>
+</div>
+<div>
+<label class="block text-sm font-medium mb-1">Audio Source</label>
+<select id="audioSource" class="w-full bg-gray-700 border border-gray-600 rounded px-3 py-2 text-sm">
+<option value="">Default Microphone</option>
+</select>
+</div>
+<div>
+<label class="flex items-center space-x-2">
+<input type="checkbox" id="enableBandwidthDetection" class="rounded bg-gray-700 border-gray-600" checked>
+<span class="text-sm">Auto-detect bandwidth</span>
+</label>
+</div>
+<div>
+<label class="block text-sm font-medium mb-1">Default Bandwidth</label>
+<select id="defaultBandwidth" class="w-full bg-gray-700 border border-gray-600 rounded px-3 py-2 text-sm">
+<option value="low">Low (64-128 kbps)</option>
+<option value="medium" selected>Medium (128-256 kbps)</option>
+<option value="high">High (256+ kbps)</option>
+</select>
+</div>
+</div>
+<div class="mt-6 flex justify-end space-x-3">
+<button id="saveSettingsBtn" class="px-4 py-2 bg-blue-600 hover:bg-blue-700 rounded font-medium">
+Save Settings
+</button>
+</div>
+</div>
+</div>
+<!-- Connection Modal -->
+<div id="connectionModal" class="fixed inset-0 bg-black bg-opacity-70 flex items-center justify-center hidden z-50">
+<div class="bg-gray-800 rounded-lg p-6 w-full max-w-md text-center">
+<div class="mb-4">
+<i class="fas fa-link text-blue-400 text-5xl mb-3"></i>
+<h3 class="text-xl font-medium mb-2">Establishing Connection</h3>
+<p class="text-gray-400 text-sm">Optimizing for low bandwidth...</p>
+</div>
+<div class="w-full bg-gray-700 rounded-full h-2 mb-4">
+<div id="connectionProgress" class="bg-blue-500 h-2 rounded-full" style="width: 0%"></div>
+</div>
+<button id="cancelConnectionBtn" class="px-4 py-2 bg-gray-700 hover:bg-gray-600 rounded font-medium">
+Cancel
+</button>
+</div>
+</div>
+</div>
+<script>
+// DOM Elements
+const localVideo = document.getElementById('localVideo');
+const remoteVideo = document.getElementById('remoteVideo');
+const callBtn = document.getElementById('callBtn');
+const endCallBtn = document.getElementById('endCallBtn');
+const toggleVideoBtn = document.getElementById('toggleVideoBtn');
+const toggleAudioBtn = document.getElementById('toggleAudioBtn');
+const connectionStatus = document.getElementById('connectionStatus');
+const bandwidthIndicator = document.getElementById('bandwidthIndicator');
+const bandwidthValue = document.getElementById('bandwidthValue');
+const optimizerPanel = document.getElementById('optimizerPanel');
+const settingsBtn = document.getElementById('settingsBtn');
+const settingsModal = document.getElementById('settingsModal');
+const closeSettingsBtn = document.getElementById('closeSettingsBtn');
+const saveSettingsBtn = document.getElementById('saveSettingsBtn');
+const connectionModal = document.getElementById('connectionModal');
+const connectionProgress = document.getElementById('connectionProgress');
+const cancelConnectionBtn = document.getElementById('cancelConnectionBtn');
+// State variables
+let localStream;
+let peerConnection;
+let isCallActive = false;
+let isVideoEnabled = true;
+let isAudioEnabled = true;
+let currentBandwidthPreset = 'medium';
+// Initialize the app
+async function init() {
+try {
+// Get media devices
+await getMediaDevices();
+// Set up event listeners
+setupEventListeners();
+// Show bandwidth optimizer panel
+optimizerPanel.classList.remove('hidden');
+// Set default bandwidth preset
+applyBandwidthPreset(currentBandwidthPreset);
+} catch (error) {
+console.error('Initialization error:', error);
+}
+}
+// Set up event listeners
+function setupEventListeners() {
+// Call buttons
+callBtn.addEventListener('click', startCall);
+endCallBtn.addEventListener('click', endCall);
+// Toggle buttons
+toggleVideoBtn.addEventListener('click', toggleVideo);
+toggleAudioBtn.addEventListener('click', toggleAudio);
+// Bandwidth optimizers
+document.querySelectorAll('.bandwidth-optimizer').forEach(optimizer => {
+optimizer.addEventListener('click', () => {
+const preset = optimizer.getAttribute('data-preset');
+applyBandwidthPreset(preset);
+});
+});
+// Settings
+settingsBtn.addEventListener('click', () => settingsModal.classList.remove('hidden'));
+closeSettingsBtn.addEventListener('click', () => settingsModal.classList.add('hidden'));
+saveSettingsBtn.addEventListener('click', saveSettings);
+// Connection modal
+cancelConnectionBtn.addEventListener('click', cancelConnection);
+}
+// Get media devices
+async function getMediaDevices() {
+try {
+localStream = await navigator.mediaDevices.getUserMedia({
+video: true,
+audio: true
+});
+localVideo.srcObject = localStream;
+// Populate device selectors
+const devices = await navigator.mediaDevices.enumerateDevices();
+const videoSource = document.getElementById('videoSource');
+const audioSource = document.getElementById('audioSource');
+devices.forEach(device => {
+if (device.kind === 'videoinput') {
+const option = document.createElement('option');
+option.value = device.deviceId;
+option.text = device.label || `Camera ${videoSource.length + 1}`;
+videoSource.appendChild(option);
+} else if (device.kind === 'audioinput') {
+const option = document.createElement('option');
+option.value = device.deviceId;
+option.text = device.label || `Microphone ${audioSource.length + 1}`;
+audioSource.appendChild(option);
+}
+});
+} catch (error) {
+console.error('Error accessing media devices:', error);
+alert('Could not access camera or microphone. Please check permissions.');
+}
+}
+// Start a call
+async function startCall() {
+if (!localStream) {
+alert('Please allow camera and microphone access first.');
+return;
+}
+// Show connection modal
+connectionModal.classList.remove('hidden');
+simulateConnectionProgress();
+try {
+// Create peer connection
+const configuration = {
+iceServers: [
+{ urls: 'stun:stun.l.google.com:19302' },
+// Add your TURN server here for NAT traversal
+]
+};
+peerConnection = new RTCPeerConnection(configuration);
+// Set up event handlers
+peerConnection.onicecandidate = handleICECandidateEvent;
+peerConnection.oniceconnectionstatechange = handleICEConnectionStateChangeEvent;
+peerConnection.onicegatheringstatechange = handleICEGatheringStateChangeEvent;
+peerConnection.onsignalingstatechange = handleSignalingStateChangeEvent;
+peerConnection.ontrack = handleTrackEvent;
+// Add local stream tracks
+localStream.getTracks().forEach(track => {
+peerConnection.addTrack(track, localStream);
+});
+// Create offer
+const offer = await peerConnection.createOffer({
+offerToReceiveAudio: true,
+offerToReceiveVideo: true
+});
+await peerConnection.setLocalDescription(offer);
+// In a real app, you would send the offer to the other peer via signaling
+// For this demo, we'll simulate the connection
+setTimeout(() => {
+// Simulate receiving an answer
+simulateAnswer();
+// Update UI
+connectionStatus.textContent = 'Connected';
+connectionStatus.className = 'font-medium text-green-400';
+// Show bandwidth indicator
+bandwidthIndicator.classList.remove('hidden');
+updateBandwidthDisplay();
+// Toggle call buttons
+callBtn.classList.add('hidden');
+endCallBtn.classList.remove('hidden');
+// Hide connection modal
+connectionModal.classList.add('hidden');
+isCallActive = true;
+}, 2000);
+} catch (error) {
+console.error('Error starting call:', error);
+connectionModal.classList.add('hidden');
+alert('Failed to start call. Please try again.');
+}
+}
+// Simulate connection progress
+function simulateConnectionProgress() {
+let progress = 0;
+const interval = setInterval(() => {
+progress += 5;
+connectionProgress.style.width = `${progress}%`;
+if (progress >= 100) {
+clearInterval(interval);
+}
+}, 200);
+}
+// Simulate receiving an answer (for demo purposes)
+function simulateAnswer() {
+if (!peerConnection) return;
+// In a real app, you would receive this from the other peer
+const answer = {
+type: 'answer',
+sdp: `v=0
+o=- 123456789 2 IN IP4 127.0.0.1
+s=-
+t=0 0
+a=group:BUNDLE 0 1
+a=msid-semantic: WMS
+m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 110 112 113 126
+c=IN IP4 0.0.0.0
+a=rtcp:9 IN IP4 0.0.0.0
+a=ice-ufrag:xyz
+a=ice-pwd:abc
+a=fingerprint:sha-256 AA:BB:CC
+a=setup:active
+a=mid:0
+a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
+a=sendrecv
+a=rtpmap:111 opus/48000/2
+a=fmtp:111 minptime=10;useinbandfec=1
+a=rtpmap:103 ISAC/16000
+a=rtpmap:104 ISAC/32000
+a=rtpmap:9 G722/8000
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:106 CN/32000
+a=rtpmap:105 CN/16000
+a=rtpmap:13 CN/8000
+a=rtpmap:110 telephone-event/48000
+a=rtpmap:112 telephone-event/32000
+a=rtpmap:113 telephone-event/16000
+a=rtpmap:126 telephone-event/8000
+a=maxptime:60
+a=ssrc:12345678 cname:audio
+m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102
+c=IN IP4 0.0.0.0
+a=rtcp:9 IN IP4 0.0.0.0
+a=ice-ufrag:xyz
+a=ice-pwd:abc
+a=fingerprint:sha-256 AA:BB:CC
+a=setup:active
+a=mid:1
+a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
+a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
+a=extmap:4 urn:3gpp:video-orientation
+a=sendrecv
+a=rtpmap:96 VP8/90000
+a=rtcp-fb:96 goog-remb
+a=rtcp-fb:96 transport-cc
+a=rtcp-fb:96 ccm fir
+a=rtcp-fb:96 nack
+a=rtcp-fb:96 nack pli
+a=rtpmap:97 rtx/90000
+a=fmtp:97 apt=96
+a=rtpmap:98 VP9/90000
+a=rtcp-fb:98 goog-remb
+a=rtcp-fb:98 transport-cc
+a=rtcp-fb:98 ccm fir
+a=rtcp-fb:98 nack
+a=rtcp-fb:98 nack pli
+a=rtpmap:99 rtx/90000
+a=fmtp:99 apt=98
+a=rtpmap:100 H264/90000
+a=rtcp-fb:100 goog-remb
+a=rtcp-fb:100 transport-cc
+a=rtcp-fb:100 ccm fir
+a=rtcp-fb:100 nack
+a=rtcp-fb:100 nack pli
+a=fmtp:100 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f
+a=rtpmap:101 rtx/90000
+a=fmtp:101 apt=100
+a=rtpmap:102 H264/90000
+a=rtcp-fb:102 goog-remb
+a=rtcp-fb:102 transport-cc
+a=rtcp-fb:102 ccm fir
+a=rtcp-fb:102 nack
+a=rtcp-fb:102 nack pli
+a=fmtp:102 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42001f
+a=ssrc-group:FID 12345678 12345679
+a=ssrc:12345678 cname:video
+a=ssrc:12345679 cname:video`
+};
+peerConnection.setRemoteDescription(new RTCSessionDescription(answer));
+}
+// End the call
+function endCall() {
+if (peerConnection) {
+peerConnection.close();
+peerConnection = null;
+}
+if (remoteVideo.srcObject) {
+remoteVideo.srcObject.getTracks().forEach(track => track.stop());
+remoteVideo.srcObject = null;
+}
+// Update UI
+connectionStatus.textContent = 'Disconnected';
+connectionStatus.className = 'font-medium text-yellow-400';
+// Hide bandwidth indicator
+bandwidthIndicator.classList.add('hidden');
+// Toggle call buttons
+callBtn.classList.remove('hidden');
+endCallBtn.classList.add('hidden');
+isCallActive = false;
+}
+// Cancel connection attempt
+function cancelConnection() {
+if (peerConnection) {
+peerConnection.close();
+peerConnection = null;
+}
+connectionModal.classList.add('hidden');
+}
+// Toggle video
+function toggleVideo() {
+if (!localStream) return;
+const videoTrack = localStream.getVideoTracks()[0];
+if (videoTrack) {
+isVideoEnabled = !videoTrack.enabled;
+videoTrack.enabled = isVideoEnabled;
+toggleVideoBtn.innerHTML = isVideoEnabled ? '<i class="fas fa-video"></i>' : '<i class="fas fa-video-slash"></i>';
+toggleVideoBtn.classList.toggle('bg-gray-800');
+toggleVideoBtn.classList.toggle('bg-red-600');
+// Update connection if active
+if (isCallActive) {
+updateBandwidthSettings();
+}
+}
+}
+// Toggle audio
+function toggleAudio() {
+if (!localStream) return;
+const audioTrack = localStream.getAudioTracks()[0];
+if (audioTrack) {
+isAudioEnabled = !audioTrack.enabled;
+audioTrack.enabled = isAudioEnabled;
+toggleAudioBtn.innerHTML = isAudioEnabled ? '<i class="fas fa-microphone"></i>' : '<i class="fas fa-microphone-slash"></i>';
+toggleAudioBtn.classList.toggle('bg-gray-800');
+toggleAudioBtn.classList.toggle('bg-red-600');
+}
+}
+// Apply bandwidth preset
+function applyBandwidthPreset(preset) {
+currentBandwidthPreset = preset;
+// Update UI
+document.querySelectorAll('.bandwidth-optimizer').forEach(opt => {
+opt.classList.remove('border-2', 'border-green-400');
+if (opt.getAttribute('data-preset') === preset) {
+opt.classList.add('border-2', 'border-green-400');
+}
+});
+// Update connection if active
+if (isCallActive) {
+updateBandwidthSettings();
+}
+// Update bandwidth display
+updateBandwidthDisplay();
+}
+// Update bandwidth settings for the connection
+function updateBandwidthSettings() {
+if (!peerConnection || !isCallActive) return;
+const senders = peerConnection.getSenders();
+senders.forEach(sender => {
+if (sender.track.kind === 'video') {
+const parameters = sender.getParameters();
+if (!parameters.encodings) {
+parameters.encodings = [{}];
+}
+// Apply bandwidth constraints based on preset
+switch (currentBandwidthPreset) {
+case 'low':
+parameters.encodings[0].maxBitrate = 128000; // 128 kbps
+break;
+case 'medium':
+parameters.encodings[0].maxBitrate = 256000; // 256 kbps
+break;
+case 'high':
+parameters.encodings[0].maxBitrate = 512000; // 512 kbps
+break;
+}
+// Apply resolution scaling based on preset
+if (sender.track.kind === 'video') {
+const constraints = {};
+switch (currentBandwidthPreset) {
+case 'low':
+constraints.width = { ideal: 160 };
+constraints.height = { ideal: 120 };
+constraints.frameRate = { ideal: 10 };
+break;
+case 'medium':
+constraints.width = { ideal: 320 };
+constraints.height = { ideal: 240 };
+constraints.frameRate = { ideal: 15 };
+break;
+case 'high':
+constraints.width = { ideal: 640 };
+constraints.height = { ideal: 480 };
+constraints.frameRate = { ideal: 24 };
+break;
+}
+sender.track.applyConstraints(constraints);
+}
+sender.setParameters(parameters);
+}
+});
+updateBandwidthDisplay();
+}
+// Update bandwidth display
+function updateBandwidthDisplay() {
+let bandwidthText = '';
+switch (currentBandwidthPreset) {
+case 'low':
+bandwidthText = '64-128 kbps';
+break;
+case 'medium':
+bandwidthText = '128-256 kbps';
+break;
+case 'high':
+bandwidthText = '256-512 kbps';
+break;
+}
+bandwidthValue.textContent = bandwidthText;
+}
+// Save settings
+function saveSettings() {
+const videoSource = document.getElementById('videoSource').value;
+const audioSource = document.getElementById('audioSource').value;
+const enableBandwidthDetection = document.getElementById('enableBandwidthDetection').checked;
+const defaultBandwidth = document.getElementById('defaultBandwidth').value;
+// In a real app, you would save these settings to localStorage or a server
+console.log('Settings saved:', {
+videoSource,
+audioSource,
+enableBandwidthDetection,
+defaultBandwidth
+});
+// Apply default bandwidth if changed
+if (defaultBandwidth !== currentBandwidthPreset) {
+applyBandwidthPreset(defaultBandwidth);
+}
+// Close settings modal
+settingsModal.classList.add('hidden');
+alert('Settings saved successfully!');
+}
+// WebRTC event handlers
+function handleICECandidateEvent(event) {
+if (event.candidate) {
+// In a real app, you would send the candidate to the other peer
+console.log('ICE candidate:', event.candidate);
+}
+}
+function handleICEConnectionStateChangeEvent() {
+if (peerConnection) {
+console.log('ICE connection state:', peerConnection.iceConnectionState);
+}
+}
+function handleICEGatheringStateChangeEvent() {
+if (peerConnection) {
+console.log('ICE gathering state:', peerConnection.iceGatheringState);
+}
+}
+function handleSignalingStateChangeEvent() {
+if (peerConnection) {
+console.log('Signaling state:', peerConnection.signalingState);
+}
+}
+function handleTrackEvent(event) {
+if (event.streams && event.streams[0]) {
+remoteVideo.srcObject = event.streams[0];
+}
+}