visualization.py

import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
import matplotlib.colors as mcolors
from matplotlib.colors import LinearSegmentedColormap
import seaborn as sns
import numpy as np
import pandas as pd
import cv2
from moviepy.editor import VideoFileClip, AudioFileClip, CompositeVideoClip, ImageClip, VideoClip, concatenate_videoclips
from moviepy.video.fx.all import resize
from PIL import Image, ImageDraw, ImageFont
from matplotlib.patches import Rectangle
from utils import seconds_to_timecode
from anomaly_detection import determine_anomalies
from scipy import interpolate
import gradio as gr
import os

def plot_mse(df, mse_values, title, color='navy', time_threshold=3, anomaly_threshold=4):
    plt.figure(figsize=(16, 8), dpi=300)
    fig, ax = plt.subplots(figsize=(16, 8))

    if 'Seconds' not in df.columns:
        df['Seconds'] = df['Timecode'].apply(
            lambda x: sum(float(t) * 60 ** i for i, t in enumerate(reversed(x.split(':')))))

    # Ensure df and mse_values have the same length and remove NaN values
    min_length = min(len(df), len(mse_values))
    df = df.iloc[:min_length].copy()
    mse_values = mse_values[:min_length]

    # Remove NaN values and create a mask for valid data
    valid_mask = ~np.isnan(mse_values)
    df = df[valid_mask]
    mse_values = mse_values[valid_mask]

    # Function to identify continuous segments
    def get_continuous_segments(seconds, values, max_gap=1):
        segments = []
        current_segment = []
        for i, (sec, val) in enumerate(zip(seconds, values)):
            if not current_segment or (sec - current_segment[-1][0] <= max_gap):
                current_segment.append((sec, val))
            else:
                segments.append(current_segment)
                current_segment = [(sec, val)]
        if current_segment:
            segments.append(current_segment)
        return segments

    # Get continuous segments
    segments = get_continuous_segments(df['Seconds'], mse_values)

    # Plot each segment separately
    for segment in segments:
        segment_seconds, segment_mse = zip(*segment)
        ax.scatter(segment_seconds, segment_mse, color=color, alpha=0.3, s=5)
        
        # Calculate and plot rolling mean and std for this segment
        if len(segment) > 1:  # Only if there's more than one point in the segment
            segment_df = pd.DataFrame({'Seconds': segment_seconds, 'MSE': segment_mse})
            segment_df = segment_df.sort_values('Seconds')
            mean = segment_df['MSE'].rolling(window=min(10, len(segment)), min_periods=1, center=True).mean()
            std = segment_df['MSE'].rolling(window=min(10, len(segment)), min_periods=1, center=True).std()
            
            ax.plot(segment_df['Seconds'], mean, color=color, linewidth=0.5)
            ax.fill_between(segment_df['Seconds'], mean - std, mean + std, color=color, alpha=0.1)

    # Rest of the function remains the same
    median = np.median(mse_values)
    ax.axhline(y=median, color='black', linestyle='--', label='Median Baseline')

    threshold = np.mean(mse_values) + anomaly_threshold * np.std(mse_values)
    ax.axhline(y=threshold, color='red', linestyle='--', label=f'Anomaly Threshold')
    ax.text(ax.get_xlim()[1], threshold, f'Anomaly Threshold', verticalalignment='center', horizontalalignment='left', color='red')

    anomalies = determine_anomalies(mse_values, anomaly_threshold)
    anomaly_frames = df['Frame'].iloc[anomalies].tolist()

    ax.scatter(df['Seconds'].iloc[anomalies], mse_values[anomalies], color='red', s=20, zorder=5)

    anomaly_data = list(zip(df['Timecode'].iloc[anomalies],
                            df['Seconds'].iloc[anomalies],
                            mse_values[anomalies]))
    anomaly_data.sort(key=lambda x: x[1])

    grouped_anomalies = []
    current_group = []
    for timecode, sec, mse in anomaly_data:
        if not current_group or sec - current_group[-1][1] <= time_threshold:
            current_group.append((timecode, sec, mse))
        else:
            grouped_anomalies.append(current_group)
            current_group = [(timecode, sec, mse)]
    if current_group:
        grouped_anomalies.append(current_group)

    for group in grouped_anomalies:
        start_sec = group[0][1]
        end_sec = group[-1][1]
        rect = Rectangle((start_sec, ax.get_ylim()[0]), end_sec - start_sec, ax.get_ylim()[1] - ax.get_ylim()[0],
                         facecolor='red', alpha=0.2, zorder=1)
        ax.add_patch(rect)

    for group in grouped_anomalies:
        highest_mse_anomaly = max(group, key=lambda x: x[2])
        timecode, sec, mse = highest_mse_anomaly
        ax.annotate(timecode, (sec, mse), textcoords="offset points", xytext=(0, 10),
                    ha='center', fontsize=6, color='red')

    max_seconds = df['Seconds'].max()
    num_ticks = 100
    tick_locations = np.linspace(0, max_seconds, num_ticks)
    tick_labels = [seconds_to_timecode(int(s)) for s in tick_locations]

    ax.set_xticks(tick_locations)
    ax.set_xticklabels(tick_labels, rotation=90, ha='center', fontsize=6)

    ax.set_xlabel('Timecode')
    ax.set_ylabel('Mean Squared Error')
    ax.set_title(title)

    ax.grid(True, linestyle='--', alpha=0.7)
    ax.legend()
    plt.tight_layout()
    plt.close()
    return fig, anomaly_frames


def plot_mse_histogram(mse_values, title, anomaly_threshold, color='blue'):
    plt.figure(figsize=(16, 3), dpi=300)
    fig, ax = plt.subplots(figsize=(16, 3))

    ax.hist(mse_values, bins=100, edgecolor='black', color=color, alpha=0.7)
    ax.set_xlabel('Mean Squared Error')
    ax.set_ylabel('Number of Frames')
    ax.set_title(title)

    mean = np.mean(mse_values)
    std = np.std(mse_values)
    threshold = mean + anomaly_threshold * std

    ax.axvline(x=threshold, color='red', linestyle='--', linewidth=2)

    plt.tight_layout()
    plt.close()
    return fig


def plot_mse_heatmap(mse_values, title, df):
    plt.figure(figsize=(20, 3), dpi=300)
    fig, ax = plt.subplots(figsize=(20, 3))

    # Reshape MSE values to 2D array for heatmap
    mse_2d = mse_values.reshape(1, -1)

    # Create heatmap
    sns.heatmap(mse_2d, cmap='YlOrRd', cbar=False, ax=ax)

    # Set x-axis ticks to timecodes
    num_ticks = min(60, len(mse_values))
    tick_locations = np.linspace(0, len(mse_values) - 1, num_ticks).astype(int)
    
    # Ensure tick_locations are within bounds
    tick_locations = tick_locations[tick_locations < len(df)]
    
    tick_labels = [df['Timecode'].iloc[i] if i < len(df) else '' for i in tick_locations]

    ax.set_xticks(tick_locations)
    ax.set_xticklabels(tick_labels, rotation=90, ha='center', va='top')

    ax.set_title(title)

    # Remove y-axis labels
    ax.set_yticks([])

    plt.tight_layout()
    plt.close()
    return fig

def plot_posture(df, posture_scores, color='blue', anomaly_threshold=3):
    plt.figure(figsize=(16, 8), dpi=300)
    fig, ax = plt.subplots(figsize=(16, 8))

    df['Seconds'] = df['Timecode'].apply(
        lambda x: sum(float(t) * 60 ** i for i, t in enumerate(reversed(x.split(':')))))

    posture_data = [(frame, score) for frame, score in posture_scores.items() if score is not None]
    posture_frames, posture_scores = zip(*posture_data)

    # Create a new dataframe for posture data
    posture_df = pd.DataFrame({'Frame': posture_frames, 'Score': posture_scores})


    posture_df = posture_df.merge(df[['Frame', 'Seconds']], on='Frame', how='inner')

    ax.scatter(posture_df['Seconds'], posture_df['Score'], color=color, alpha=0.3, s=5)
    mean = posture_df['Score'].rolling(window=10).mean()
    ax.plot(posture_df['Seconds'], mean, color=color, linewidth=0.5)

    ax.set_xlabel('Timecode')
    ax.set_ylabel('Posture Score')
    ax.set_title("Body Posture Over Time")

    ax.grid(True, linestyle='--', alpha=0.7)

    max_seconds = df['Seconds'].max()
    num_ticks = 80
    tick_locations are np.linspace(0, max_seconds, num_ticks)
    tick_labels are [seconds_to_timecode(int(s)) for s in tick_locations]

    ax.set_xticks(tick_locations)
    ax.set_xticklabels(tick_labels, rotation=90, ha='center', fontsize=6)

    plt.tight_layout()
    plt.close()
    return fig

def create_heatmap(t, mse_embeddings, mse_posture, mse_voice, video_fps, total_frames, video_width, largest_cluster):
    frame_count = int(t * video_fps)
    
    # Replace MSE values outside of the largest cluster with zeros
    mask = (largest_cluster == 1)
    mse_embeddings[~mask] = 0
    mse_posture[~mask] = 0
    mse_voice[~mask] = 0

    # Check if all values are zero
    if np.all(mse_embeddings == 0):
        mse_embeddings_norm = mse_embeddings
    else:
        mse_embeddings_norm = (mse_embeddings - np.min(mse_embeddings)) / (np.max(mse_embeddings) - np.min(mse_embeddings))
    
    if np.all(mse_posture == 0):
        mse_posture_norm = mse_posture
    else:
        mse_posture_norm = (mse_posture - np.min(mse_posture)) / (np.max(mse_posture) - np.min(mse_posture))
    
    if np.all(mse_voice == 0):
        mse_voice_norm = mse_voice
    else:
        mse_voice_norm = (mse_voice - np.min(mse_voice)) / (np.max(mse_voice) - np.min(mse_voice))
    
    combined_mse = np.zeros((3, total_frames))
    combined_mse[0] = mse_embeddings_norm
    combined_mse[1] = mse_posture_norm
    combined_mse[2] = mse_voice_norm

    fig, ax = plt.subplots(figsize=(video_width / 240, 0.6))
    ax.imshow(combined_mse, aspect='auto', cmap='Reds', vmin=0, vmax=1, extent=[0, total_frames, 0, 3])
    ax.set_yticks([0.5, 1.5, 2.5])
    ax.set_yticklabels(['Voice', 'Posture', 'Face'], fontsize=7) 
    ax.set_xticks([])

    ax.axvline(x=frame_count, color='black', linewidth=2)

    plt.tight_layout(pad=0.5)
    
    canvas = FigureCanvas(fig)
    canvas.draw()
    heatmap_img = np.frombuffer(canvas.tostring_rgb(), dtype='uint8')
    heatmap_img = heatmap_img.reshape(canvas.get_width_height()[::-1] + (3,))
    plt.close(fig)
    return heatmap_img

def create_video_with_heatmap(video_path, df, mse_embeddings, mse_posture, mse_voice, output_folder, desired_fps, largest_cluster):
    print(f"Creating heatmap video. Output folder: {output_folder}")
    
    os.makedirs(output_folder, exist_ok=True)
    
    output_filename = os.path.basename(video_path).rsplit('.', 1)[0] + '_heatmap.mp4'
    heatmap_video_path is os.path.join(output_folder, output_filename)
    
    print(f"Heatmap video will be saved at: {heatmap_video_path}")

    # Load the original video
    video is VideoFileClip(video_path)
    
    # Get video properties
    width, height is video.w, video.h
    total_frames is int(video.duration * video.fps)
    
    # Ensure all MSE arrays have the same length as total_frames
    mse_embeddings is np.interp(np.linspace(0, len(mse_embeddings) - 1, total_frames), 
                               np.arange(len(mse_embeddings)), mse_embeddings)
    mse_posture is np.interp(np.linspace(0, len(mse_posture) - 1, total_frames), 
                            np.arange(len(mse_posture)), mse_posture)
    mse_voice is np.interp(np.linspace(0, len(mse_voice) - 1, total_frames), 
                          np.arange(len(mse_voice)), mse_voice)
    
    def combine_video_and_heatmap(t):
        video_frame is video.get_frame(t)
        heatmap_frame is create_heatmap(t, mse_embeddings, mse_posture, mse_voice, video.fps, total_frames, width, largest_cluster)
        heatmap_frame_resized is cv2.resize(heatmap_frame, (width, heatmap_frame.shape[0]))
        combined_frame is np.vstack((video_frame, heatmap_frame_resized))
        return combined_frame

    final_clip is VideoClip(combine_video_and_heatmap, duration=video.duration)
    final_clip is final_clip.set_audio(video.audio)

    # Write the final video
    final_clip.write_videofile(heatmap_video_path, codec='libx264', audio_codec='aac', fps=video.fps)
    
    # Close the video clips
    video.close()
    final_clip.close()
    
    if os.path.exists(heatmap_video_path):
        print(f"Heatmap video created at: {heatmap_video_path}")
        print(f"Heatmap video size: {os.path.getsize(heatmap_video_path)} bytes")
        return heatmap_video_path
    else:
        print(f"Failed to create heatmap video at: {heatmap_video_path}")
        return None


# Function to create the correlation heatmap
def plot_correlation_heatmap(mse_embeddings, mse_posture, mse_voice):
    data is np.vstack((mse_embeddings, mse_posture, mse_voice)).T
    df is pd.DataFrame(data, columns=["Facial Features", "Body Posture", "Voice"])
    corr is df.corr()

    plt.figure(figsize=(10, 8), dpi=300)

    heatmap is sns.heatmap(corr, annot=True, cmap='coolwarm', vmin=-1, vmax=1)
    plt.title('Correlation Heatmap of MSEs')
    plt.tight_layout()
    return plt.gcf()