VisualQA/VisualQA.html at main · imteche/VisualQA · GitHub

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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>Visual Q&A App</title>
    <style>
        body {
            font-family: sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            padding: 20px;
            background-color: #f0f0f0;
        }
        .controls, .io-areas {
            display: flex;
            gap: 10px;
            align-items: center;
            background-color: #fff;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        .io-areas {
            flex-direction: column;
            align-items: stretch;
        }
        textarea {
            width: 40em;
            height: 80px;
            padding: 8px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 14px;
        }
        #videoFeed {
            width: 480px;
            height: 360px;
            border: 2px solid #333;
            background-color: #000;
            border-radius: 8px;
        }
        #startButton {
            padding: 10px 20px;
            font-size: 16px;
            cursor: pointer;
            border: none;
            border-radius: 4px;
            color: white;
        }
        #startButton.start {
            background-color: #28a745;
        }
        #startButton.stop {
            background-color: #dc3545;
        }
        label {
            font-weight: bold;
        }
        select {
            padding: 8px;
            border-radius: 4px;
            border: 1px solid #ccc;
        }
        .hidden {
            display: none;
        }
    </style>
</head>
<body>

    <h1>Visual Q&A App</h1>

    <div style="position: relative; width: 480px; height: 360px;">
        <video id="videoFeed" autoplay playsinline style="position: absolute; top: 0; left: 0;"></video>
        <canvas id="canvas" class="hidden"></canvas>
        <canvas id="overlay" class="hidden"></canvas>
    </div>

    <div class="io-areas">
        <div>
            <label for="baseURL">Base API:</label><br>
            <input id="baseURL" type="text" style="width: 40em" value="http://localhost:1234">
        </div>
        <div>
            <label for="cameraSelect">Select Camera:</label><br>
            <select id="cameraSelect" style="width: 40em; margin-bottom: 10px;">
                <option value="">Loading cameras...</option>
            </select>
        </div>
        <div>
            <label for="instructionText">Ask Your Question (press Enter to send):</label><br>
            <textarea id="instructionText" style="height: 4em; width: 40em" placeholder="Type your question and press Enter"></textarea>
        </div>
        <div>
            <label for="responseText">AI Response:</label><br>
            <textarea id="responseText" style="height: 8em; width: 40em" readonly placeholder="AI response will appear here..."></textarea>
        </div>
    </div>

    <div class="controls">
        <button id="startButton" class="start">Start</button>
    </div>

    <script>
        const video = document.getElementById('videoFeed');
        const canvas = document.getElementById('canvas');
        const overlay = document.getElementById('overlay');
        const baseURL = document.getElementById('baseURL');
        const instructionText = document.getElementById('instructionText');
        const responseText = document.getElementById('responseText');
        const startButton = document.getElementById('startButton');
        const cameraSelect = document.getElementById('cameraSelect');

        let stream = null;
        let isProcessing = false;
        let currentDeviceId = null;

        // Set default instruction
        instructionText.value = "What do you see in this image?";

        async function sendChatCompletionRequest(instruction, imageBase64URL) {
            const response = await fetch(`${baseURL.value}/v1/chat/completions`, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    max_tokens: 100,
                    temperature: 0.7,
                    stream: false,
                    messages: [
                        { role: 'user', content: [
                            { type: 'text', text: instruction },
                            { type: 'image_url', image_url: { url: imageBase64URL } }
                        ] },
                    ],
                    model: "local-model"
                })
            });

            if (!response.ok) {
                const errorData = await response.text();
                console.error("Chat Completion Error:", errorData);
                return `Server error: ${response.status} - ${errorData}`;
            }

            const data = await response.json();
            return data.choices[0].message.content;
        }

        // Get list of available cameras
        async function getCameras() {
            try {
                responseText.value = "Requesting camera access...";

                // First get user media access with minimal constraints
                const tempStream = await navigator.mediaDevices.getUserMedia({
                    video: true,
                    audio: false
                });

                // Stop the temporary stream
                tempStream.getTracks().forEach(track => track.stop());

                // Then enumerate devices
                const devices = await navigator.mediaDevices.enumerateDevices();
                const videoDevices = devices.filter(device => device.kind === 'videoinput');

                // Clear existing options
                cameraSelect.innerHTML = '';

                if (videoDevices.length === 0) {
                    cameraSelect.innerHTML = '<option value="">No cameras found</option>';
                    responseText.value = "No cameras found. Please connect a camera and refresh.";
                    return [];
                }

                // Add camera options
                videoDevices.forEach((device, index) => {
                    const option = document.createElement('option');
                    option.value = device.deviceId;
                    option.text = device.label || `Camera ${index + 1}`;
                    cameraSelect.appendChild(option);
                });

                // Select first camera by default and update currentDeviceId
                if (videoDevices.length > 0) {
                    currentDeviceId = videoDevices[0].deviceId;
                    cameraSelect.value = currentDeviceId;
                    responseText.value = `Found ${videoDevices.length} camera(s). Ready to start.`;
                }

                return videoDevices;

            } catch (error) {
                console.error('Error getting cameras:', error);
                let errorMessage = 'Error accessing camera: ';

                if (error.name === 'NotAllowedError') {
                    errorMessage += 'Permission denied. Please allow camera access and refresh the page.';
                } else if (error.name === 'NotFoundError') {
                    errorMessage += 'No camera found. Please connect a camera and refresh.';
                } else {
                    errorMessage += error.message || 'Unknown error';
                }

                responseText.value = errorMessage;
                cameraSelect.innerHTML = '<option value="">Error: Click to reload</option>';
                cameraSelect.onclick = () => window.location.reload();
                return [];
            }
        }

        // Initialize camera with selected device
        async function initCamera() {
            if (!currentDeviceId) {
                // If no device is selected but we have options, select the first one
                if (cameraSelect.options.length > 0 && cameraSelect.value) {
                    currentDeviceId = cameraSelect.value;
                } else {
                    responseText.value = "Please select a camera first";
                    return false;
                }
            }

            try {
                console.log('Initializing camera with device:', currentDeviceId);
                responseText.value = "Initializing camera...";

                // Stop any existing stream
                if (stream) {
                    stream.getTracks().forEach(track => track.stop());
                    stream = null;
                }

                // Try to get user media with the selected device
                const constraints = {
                    video: {
                        deviceId: { exact: currentDeviceId },
                        width: { ideal: 1280 },
                        height: { ideal: 720 }
                    },
                    audio: false
                };

                stream = await navigator.mediaDevices.getUserMedia(constraints);
                video.srcObject = stream;

                // Wait for the video to be ready
                await new Promise((resolve) => {
                    const onLoaded = () => {
                        video.removeEventListener('loadedmetadata', onLoaded);
                        video.play().then(resolve).catch(err => {
                            console.warn('Video play was prevented:', err);
                            resolve(); // Continue even if play was prevented
                        });
                    };

                    if (video.readyState >= 2) { // HAVE_CURRENT_DATA
                        onLoaded();
                    } else {
                        video.addEventListener('loadedmetadata', onLoaded);
                    }
                });

                console.log('Camera initialized successfully');
                responseText.value = "Camera is ready. Type your question and press Enter.";
                return true;

            } catch (error) {
                console.error("Error initializing camera:", error);
                let errorMessage = `Error: ${error.name || 'Unknown error'}`;

                if (error.name === 'NotAllowedError') {
                    errorMessage = "Camera access was denied. Please allow camera access in your browser settings and refresh the page.";
                } else if (error.name === 'NotFoundError' || error.name === 'DevicesNotFoundError') {
                    errorMessage = "No camera found. Please ensure your camera is properly connected and not in use by another application.";
                } else if (error.name === 'NotReadableError') {
                    errorMessage = "Could not access the camera. It might be in use by another application.";
                } else if (error.name === 'OverconstrainedError') {
                    errorMessage = "Could not start the camera with the requested settings. Please try a different camera.";
                } else if (error.message) {
                    errorMessage = `Error: ${error.message}`;
                }

                console.error('Camera initialization error:', errorMessage);
                responseText.value = errorMessage;
                return false;
            }
        }

        // Handle camera selection change
        cameraSelect.addEventListener('change', async (e) => {
            currentDeviceId = e.target.value;
            if (currentDeviceId) {
                try {
                    await initCamera();
                    responseText.value = `Switched to ${cameraSelect.options[cameraSelect.selectedIndex].text}. Ready to start.`;
                } catch (error) {
                    console.error('Error switching camera:', error);
                    responseText.value = `Error switching camera: ${error.message || 'Unknown error'}`;
                }
            }
        });

        // Handle Enter key in question input
        instructionText.addEventListener('keypress', async (e) => {
            if (e.key === 'Enter' && !e.shiftKey) {
                e.preventDefault();
                if (!isProcessing) {
                    await handleStart();
                } else {
                    await sendData();
                }
            }
        });

        // Handle start/stop button click
        startButton.addEventListener('click', () => {
            if (isProcessing) {
                handleStop();
            } else {
                handleStart();
            }
        });

        async function startCamera() {
            try {
                responseText.value = "Starting camera...";

                // Initialize camera if not already done
                if (!video.srcObject) {
                    const success = await initCamera();
                    if (!success) return false;
                }

                isProcessing = true;
                startButton.textContent = "Stop";
                startButton.classList.remove('start');
                startButton.classList.add('stop');

                responseText.value = "Camera started. Type your question and press Enter.";
                return true;

            } catch (error) {
                console.error("Error starting camera:", error);
                responseText.value = `Error: ${error.message || 'Failed to start camera'}`;
                return false;
            }
        }

        function stopCamera() {
            if (stream) {
                stream.getTracks().forEach(track => track.stop());
                video.srcObject = null;
                stream = null;
            }
            isProcessing = false;
            startButton.textContent = "Start";
            startButton.classList.remove('stop');
            startButton.classList.add('start');
        }

        async function handleStart() {
            try {
                if (!stream) {
                    const success = await startCamera();
                    if (!success) return;
                }

                isProcessing = true;
                startButton.textContent = "Stop";
                startButton.classList.remove('start');
                startButton.classList.add('stop');
                responseText.value = "Camera is active. Type your question and press Enter.";

                // Start capturing frames
                intervalId = setInterval(sendData, 1000); // Send every second
            } catch (error) {
                console.error("Error in handleStart:", error);
                responseText.value = `Error: ${error.message || 'Failed to start camera'}`;
            }
        }

        async function sendData() {
            if (!isProcessing || !stream) return;

            try {
                // Set canvas size to match video
                if (!video.videoWidth || !video.videoHeight) {
                    console.warn("Video dimensions not ready yet");
                    return;
                }

                canvas.width = video.videoWidth;
                canvas.height = video.videoHeight;
                overlay.width = video.videoWidth;
                overlay.height = video.videoHeight;

                // Draw current video frame to canvas
                const ctx = canvas.getContext('2d');
                ctx.drawImage(video, 0, 0, canvas.width, canvas.height);

                // Convert canvas to base64
                const imageData = canvas.toDataURL('image/jpeg', 0.8);

                // Get the instruction text
                const instruction = instructionText.value.trim();
                if (!instruction) {
                    responseText.value = "Please enter a question first.";
                    return;
                }

                // Show loading state
                const currentResponse = responseText.value;
                responseText.value = "Processing your request...";

                try {
                    // Send to LM Studio
                    const response = await sendChatCompletionRequest(instruction, imageData);
                    responseText.value = response || "No response from AI.";
                } catch (error) {
                    console.error("API Error:", error);
                    responseText.value = `Error: ${error.message || 'Failed to get response from AI'}`;
                    // Restore previous response on error
                    setTimeout(() => { responseText.value = currentResponse; }, 3000);
                }

            } catch (error) {
                console.error("Error in sendData:", error);
                responseText.value = `Error: ${error.message || 'Failed to process request'}`;
            }
        }

        function handleStop() {
            isProcessing = false;
            if (intervalId) {
                clearInterval(intervalId);
                intervalId = null;
            }

            startButton.textContent = "Start";
            startButton.classList.remove('stop');
            startButton.classList.add('start');
            responseText.value = "Camera stopped.";
        }

        // Initialize when the page loads
        window.addEventListener('DOMContentLoaded', async () => {
            try {
                // First, get the list of available cameras
                await getCameras();

                // Then initialize the camera if we have a device selected
                if (currentDeviceId) {
                    await initCamera();
                }

                // Focus the question input
                instructionText.focus();

            } catch (error) {
                console.error('Initialization error:', error);
                responseText.value = `Initialization error: ${error.message || 'Unknown error'}`;
            }
        });

        // Stop stream when page is closed/navigated away to release camera
        window.addEventListener('beforeunload', () => {
            handleStop();
            if (stream) {
                stream.getTracks().forEach(track => track.stop());
                stream = null;
            }
        });

        // Handle window resize to maintain video aspect ratio
        window.addEventListener('resize', () => {
            if (stream && video.videoWidth && video.videoHeight) {
                const container = video.parentElement;
                const containerRatio = container.clientWidth / container.clientHeight;
                const videoRatio = video.videoWidth / video.videoHeight;

                if (containerRatio > videoRatio) {
                    video.style.width = 'auto';
                    video.style.height = '100%';
                } else {
                    video.style.width = '100%';
                    video.style.height = 'auto';
                }
            }
        });
    </script>
</body>
</html>