rustrtc 0.3.47

A high-performance implementation of WebRTC
Documentation 
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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>RustRTC Audio Saver</title>
    <style>
        body {
            font-family: sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
        }

        button {
            padding: 10px 20px;
            font-size: 16px;
        }
    </style>
</head>

<body>
    <h1>RustRTC Audio Saver</h1>
    <p>Click "Start Recording" to send microphone audio to the server. The server will save it as
        <code>output.ulaw</code>.</p>
    <p>To play back the saved file: <code>ffplay -f mulaw -ar 8000 output.ulaw</code></p>

    <div id="status">Status: Idle</div>
    <br>
    <button id="start-btn">Start Recording</button>
    <button id="stop-btn" disabled>Stop</button>

    <script>
        const statusDiv = document.getElementById('status');
        const startBtn = document.getElementById('start-btn');
        const stopBtn = document.getElementById('stop-btn');

        let pc = null;
        let stream = null;

        startBtn.onclick = async () => {
            try {
                startBtn.disabled = true;
                statusDiv.textContent = "Status: Requesting Microphone...";

                stream = await navigator.mediaDevices.getUserMedia({ audio: true, video: false });

                statusDiv.textContent = "Status: Connecting...";
                pc = new RTCPeerConnection();

                stream.getTracks().forEach(track => pc.addTrack(track, stream));

                pc.onicecandidate = e => {
                    if (e.candidate) {
                        console.log("New candidate", e.candidate);
                    }
                };

                pc.onconnectionstatechange = () => {
                    statusDiv.textContent = "Status: " + pc.connectionState;
                    if (pc.connectionState === 'connected') {
                        stopBtn.disabled = false;
                    }
                };

                const offer = await pc.createOffer();
                await pc.setLocalDescription(offer);

                // Wait for ICE gathering
                await new Promise(resolve => {
                    if (pc.iceGatheringState === 'complete') {
                        resolve();
                    } else {
                        const checkIce = () => {
                            if (pc.iceGatheringState === 'complete') {
                                pc.removeEventListener('icegatheringstatechange', checkIce);
                                resolve();
                            }
                        };
                        pc.addEventListener('icegatheringstatechange', checkIce);
                    }
                });

                const response = await fetch('/offer', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({ sdp: pc.localDescription.sdp })
                });

                const answer = await response.json();
                await pc.setRemoteDescription(new RTCSessionDescription({ type: 'answer', sdp: answer.sdp }));

            } catch (e) {
                console.error(e);
                statusDiv.textContent = "Error: " + e.message;
                startBtn.disabled = false;
            }
        };

        stopBtn.onclick = () => {
            if (pc) {
                pc.close();
                pc = null;
            }
            if (stream) {
                stream.getTracks().forEach(t => t.stop());
                stream = null;
            }
            statusDiv.textContent = "Status: Stopped";
            startBtn.disabled = false;
            stopBtn.disabled = true;
        };
    </script>
</body>

</html>