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fastrtc
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talk-to-gemini

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File size: 15,581 Bytes

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Gemini Voice Chat</title>
    <style>
        :root {
            --color-accent: #6366f1;
            --color-background: #0f172a;
            --color-surface: #1e293b;
            --color-text: #e2e8f0;
            --boxSize: 8px;
            --gutter: 4px;
        }

        body {
            margin: 0;
            padding: 0;
            background-color: var(--color-background);
            color: var(--color-text);
            font-family: system-ui, -apple-system, sans-serif;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .container {
            width: 90%;
            max-width: 800px;
            background-color: var(--color-surface);
            padding: 2rem;
            border-radius: 1rem;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
        }

        .wave-container {
            position: relative;
            display: flex;
            min-height: 100px;
            max-height: 128px;
            justify-content: center;
            align-items: center;
            margin: 2rem 0;
        }

        .box-container {
            display: flex;
            justify-content: space-between;
            height: 64px;
            width: 100%;
        }

        .box {
            height: 100%;
            width: var(--boxSize);
            background: var(--color-accent);
            border-radius: 8px;
            transition: transform 0.05s ease;
        }

        .controls {
            display: grid;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .input-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        label {
            font-size: 0.875rem;
            font-weight: 500;
        }

        input,
        select {
            padding: 0.75rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background-color: var(--color-background);
            color: var(--color-text);
            font-size: 1rem;
        }

        button {
            padding: 1rem 2rem;
            border-radius: 0.5rem;
            border: none;
            background-color: var(--color-accent);
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        button:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        .icon-with-spinner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            min-width: 180px;
        }

        .spinner {
            width: 20px;
            height: 20px;
            border: 2px solid white;
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            flex-shrink: 0;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .pulse-container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            min-width: 180px;
        }

        .pulse-circle {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: white;
            opacity: 0.2;
            flex-shrink: 0;
            transform: translateX(-0%) scale(var(--audio-level, 1));
            transition: transform 0.1s ease;
        }

        /* Add styles for toast notifications */
        .toast {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            padding: 16px 24px;
            border-radius: 4px;
            font-size: 14px;
            z-index: 1000;
            display: none;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }

        .toast.error {
            background-color: #f44336;
            color: white;
        }

        .toast.warning {
            background-color: #ffd700;
            color: black;
        }
    </style>
</head>


<body>
    <!-- Add toast element after body opening tag -->
    <div id="error-toast" class="toast"></div>
    <div style="text-align: center">
        <h1>Gemini Voice Chat</h1>
        <p>Speak with Gemini using real-time audio streaming</p>
        <p>
            Get a Gemini API key
            <a href="https://ai.google.dev/gemini-api/docs/api-key">here</a>
        </p>
    </div>
    <div class="container">
        <div class="controls">
            <div class="input-group">
                <label for="api-key">API Key</label>
                <input type="password" id="api-key" placeholder="Enter your API key">
            </div>
            <div class="input-group">
                <label for="voice">Voice</label>
                <select id="voice">
                    <option value="Puck">Puck</option>
                    <option value="Charon">Charon</option>
                    <option value="Kore">Kore</option>
                    <option value="Fenrir">Fenrir</option>
                    <option value="Aoede">Aoede</option>
                </select>
            </div>
        </div>

        <div class="wave-container">
            <div class="box-container">
                <!-- Boxes will be dynamically added here -->
            </div>
        </div>

        <button id="start-button">Start Recording</button>
    </div>

    <audio id="audio-output"></audio>

    <script>
        let peerConnection;
        let audioContext;
        let dataChannel;
        let isRecording = false;
        let webrtc_id;

        const startButton = document.getElementById('start-button');
        const apiKeyInput = document.getElementById('api-key');
        const voiceSelect = document.getElementById('voice');
        const audioOutput = document.getElementById('audio-output');
        const boxContainer = document.querySelector('.box-container');

        const numBars = 32;
        for (let i = 0; i < numBars; i++) {
            const box = document.createElement('div');
            box.className = 'box';
            boxContainer.appendChild(box);
        }

        function updateButtonState() {
            if (peerConnection && (peerConnection.connectionState === 'connecting' || peerConnection.connectionState === 'new')) {
                startButton.innerHTML = `
                    <div class="icon-with-spinner">
                        <div class="spinner"></div>
                        <span>Connecting...</span>
                    </div>
                `;
            } else if (peerConnection && peerConnection.connectionState === 'connected') {
                startButton.innerHTML = `
                    <div class="pulse-container">
                        <div class="pulse-circle"></div>
                        <span>Stop Recording</span>
                    </div>
                `;
            } else {
                startButton.innerHTML = 'Start Recording';
            }
        }

        function showError(message) {
            const toast = document.getElementById('error-toast');
            toast.textContent = message;
            toast.className = 'toast error';
            toast.style.display = 'block';

            // Hide toast after 5 seconds
            setTimeout(() => {
                toast.style.display = 'none';
            }, 5000);
        }

        async function setupWebRTC() {
            const config = __RTC_CONFIGURATION__;
            peerConnection = new RTCPeerConnection(config);
            webrtc_id = Math.random().toString(36).substring(7);

            const timeoutId = setTimeout(() => {
                const toast = document.getElementById('error-toast');
                toast.textContent = "Connection is taking longer than usual. Are you on a VPN?";
                toast.className = 'toast warning';
                toast.style.display = 'block';

                // Hide warning after 5 seconds
                setTimeout(() => {
                    toast.style.display = 'none';
                }, 5000);
            }, 5000);

            try {
                const stream = await navigator.mediaDevices.getUserMedia({ audio: true });
                stream.getTracks().forEach(track => peerConnection.addTrack(track, stream));

                // Update audio visualization setup
                audioContext = new AudioContext();
                analyser_input = audioContext.createAnalyser();
                const source = audioContext.createMediaStreamSource(stream);
                source.connect(analyser_input);
                analyser_input.fftSize = 64;
                dataArray_input = new Uint8Array(analyser_input.frequencyBinCount);

                function updateAudioLevel() {
                    analyser_input.getByteFrequencyData(dataArray_input);
                    const average = Array.from(dataArray_input).reduce((a, b) => a + b, 0) / dataArray_input.length;
                    const audioLevel = average / 255;

                    const pulseCircle = document.querySelector('.pulse-circle');
                    if (pulseCircle) {
                        console.log("audioLevel", audioLevel);
                        pulseCircle.style.setProperty('--audio-level', 1 + audioLevel);
                    }

                    animationId = requestAnimationFrame(updateAudioLevel);
                }
                updateAudioLevel();

                // Add connection state change listener
                peerConnection.addEventListener('connectionstatechange', () => {
                    console.log('connectionstatechange', peerConnection.connectionState);
                    if (peerConnection.connectionState === 'connected') {
                        clearTimeout(timeoutId);
                        const toast = document.getElementById('error-toast');
                        toast.style.display = 'none';
                    }
                    updateButtonState();
                });

                // Handle incoming audio
                peerConnection.addEventListener('track', (evt) => {
                    if (audioOutput && audioOutput.srcObject !== evt.streams[0]) {
                        audioOutput.srcObject = evt.streams[0];
                        audioOutput.play();

                        // Set up audio visualization on the output stream
                        audioContext = new AudioContext();
                        analyser = audioContext.createAnalyser();
                        const source = audioContext.createMediaStreamSource(evt.streams[0]);
                        source.connect(analyser);
                        analyser.fftSize = 2048;
                        dataArray = new Uint8Array(analyser.frequencyBinCount);
                        updateVisualization();
                    }
                });

                // Create data channel for messages
                dataChannel = peerConnection.createDataChannel('text');
                dataChannel.onmessage = (event) => {
                    const eventJson = JSON.parse(event.data);
                    if (eventJson.type === "error") {
                        showError(eventJson.message);
                    } else if (eventJson.type === "send_input") {
                        fetch('/input_hook', {
                            method: 'POST',
                            headers: {
                                'Content-Type': 'application/json',
                            },
                            body: JSON.stringify({
                                webrtc_id: webrtc_id,
                                api_key: apiKeyInput.value,
                                voice_name: voiceSelect.value
                            })
                        });
                    }
                };

                // Create and send offer
                const offer = await peerConnection.createOffer();
                await peerConnection.setLocalDescription(offer);

                await new Promise((resolve) => {
                    if (peerConnection.iceGatheringState === "complete") {
                        resolve();
                    } else {
                        const checkState = () => {
                            if (peerConnection.iceGatheringState === "complete") {
                                peerConnection.removeEventListener("icegatheringstatechange", checkState);
                                resolve();
                            }
                        };
                        peerConnection.addEventListener("icegatheringstatechange", checkState);
                    }
                });

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

                const serverResponse = await response.json();

                if (serverResponse.status === 'failed') {
                    showError(serverResponse.meta.error === 'concurrency_limit_reached'
                        ? `Too many connections. Maximum limit is ${serverResponse.meta.limit}`
                        : serverResponse.meta.error);
                    stop();
                    startButton.textContent = 'Start Recording';
                    return;
                }

                await peerConnection.setRemoteDescription(serverResponse);
            } catch (err) {
                clearTimeout(timeoutId);
                console.error('Error setting up WebRTC:', err);
                showError('Failed to establish connection. Please try again.');
                stop();
                startButton.textContent = 'Start Recording';
            }
        }

        function updateVisualization() {
            if (!analyser) return;

            analyser.getByteFrequencyData(dataArray);
            const bars = document.querySelectorAll('.box');

            for (let i = 0; i < bars.length; i++) {
                const barHeight = (dataArray[i] / 255) * 2;
                bars[i].style.transform = `scaleY(${Math.max(0.1, barHeight)})`;
            }

            animationId = requestAnimationFrame(updateVisualization);
        }

        function stopWebRTC() {
            if (peerConnection) {
                peerConnection.close();
            }
            if (animationId) {
                cancelAnimationFrame(animationId);
            }
            if (audioContext) {
                audioContext.close();
            }
            updateButtonState();
        }

        startButton.addEventListener('click', () => {
            if (!isRecording) {
                setupWebRTC();
                startButton.classList.add('recording');
            } else {
                stopWebRTC();
                startButton.classList.remove('recording');
            }
            isRecording = !isRecording;
        });
    </script>
</body>

</html>