app.py

import cv2
import numpy as np
import torch
import streamlit as st
import streamlit.components.v1 as components
from ultralytics import YOLO
from camera_input_live import camera_input_live

# Load YOLO fire detection model
model_path = "last.pt"
device = "cuda" if torch.cuda.is_available() else "cpu"
model = YOLO(model_path)
model.to(device)

# Streamlit app title
st.title("🔥 Live Fire Detection with Alarm 🔥")
st.subheader("Hold the camera towards potential fire sources to detect in real-time.")

# Load alarm sound from a public URL
alarm_url = "https://soundcloud.com/trending-music-in/sets/soul?utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing"  # Replace with your hosted alarm

# JavaScript to control alarm playback
js_code = f"""
<script>
    var alarm = new Audio("{alarm_url}");
    function playAlarm() {{
        alarm.loop = true;
        alarm.play();
    }}
    function stopAlarm() {{
        alarm.pause();
        alarm.currentTime = 0;
    }}
</script>
"""

# Display the JavaScript once
components.html(js_code, height=0)

# Capture live camera input
image = camera_input_live()

if image is not None:
    # Convert the image to OpenCV format
    bytes_data = image.getvalue()
    cv2_img = cv2.imdecode(np.frombuffer(bytes_data, np.uint8), cv2.IMREAD_COLOR)

    # Perform fire detection
    results = model(cv2_img)

    fire_present = False  # Flag for fire detection
    
    # Draw bounding boxes for detected fires
    for result in results:
        boxes = result.boxes
        for box in boxes:
            b = box.xyxy[0].cpu().numpy().astype(int)
            label = f'Fire {box.conf[0]:.2f}'
            cv2.rectangle(cv2_img, (b[0], b[1]), (b[2], b[3]), (0, 0, 255), 3)
            cv2.putText(cv2_img, label, (b[0], b[1] - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.9, (0, 0, 255), 2)
            fire_present = True

    # Display the annotated image
    st.image(cv2_img, channels="BGR", caption="Detected Fire", use_container_width=True)
    
    # Display logs & trigger alarm using JavaScript
    if fire_present:
        st.error("🔥 Fire Detected! 🔥")
        components.html("<script>playAlarm();</script>", height=0)
    else:
        st.success("✅ No Fire Detected")
        components.html("<script>stopAlarm();</script>", height=0)