1306 lines
51 KiB
Python
1306 lines
51 KiB
Python
import sys
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import os
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import re
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import argparse
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import errno
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import time
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import subprocess
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import signal
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from PIL import Image
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from multiprocessing import Pool
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from multiprocessing import Value
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from PIL import Image, ImageDraw, ImageFont
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import io
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import struct
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class State(object):
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def __init__(self):
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self.counter = Value('i', 0)
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self.start_ticks = Value('d', time.process_time())
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def increment(self, n=1):
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with self.counter.get_lock():
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self.counter.value += n
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@property
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def value(self):
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return self.counter.value
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@property
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def start(self):
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return self.start_ticks.value
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def init(args):
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global state
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state = args
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# Ignore SIGINT in worker processes - let main process handle KeyboardInterrupt
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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def main():
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args = parse_args()
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state = State()
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files = find_files(args.directory)
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try:
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with Pool(processes=4, initializer=init, initargs=(state, )) as pool:
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pool.map(process_file, files)
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except KeyboardInterrupt:
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print("\nInterrupted by user. Cleaning up...")
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return 1
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print("{0} files processed in total.".format(state.value))
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return 0
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def parse_args():
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parser = argparse.ArgumentParser(
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description="Create thumbnails for Synology Photo Station.")
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parser.add_argument("--directory", required=True,
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help="Directory to generate thumbnails for. "
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"Subdirectories will always be processed.")
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return parser.parse_args()
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def _ffmpeg_enabled():
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try:
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val = os.environ.get('THUMBGEN_ENABLE_FFMPEG', '1').strip().lower()
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return val in ('1', 'true', 'yes', 'on')
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except Exception:
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return False
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def find_files(dir):
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# Only process formats that Synology doesn't handle well
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# Exclude common images (jpg, png, gif, etc.) since NAS handles them fine
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valid_exts = ('mp4', 'avi', 'mkv', 'mov', 'wmv', 'flv', 'm4v', 'ts',
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'psd', 'blend')
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valid_exts_re = "|".join(
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map((lambda ext: ".*\\.{0}$".format(ext)), valid_exts))
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for root, dirs, files in os.walk(dir):
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for name in files:
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if re.match(valid_exts_re, name, re.IGNORECASE) \
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and not name.startswith('SYNOPHOTO_THUMB') \
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and not name.startswith('SYNOVIDEO_VIDEO_SCREENSHOT'):
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yield os.path.join(root, name)
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def print_progress():
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global state
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state.increment(1)
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processed = state.value
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if processed % 10 == 0:
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elapsed = float(time.process_time() - state.start)
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rate = float(processed) / elapsed if elapsed > 0 else float(processed)
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print("{0} files processed so far, averaging {1:.2f} files per second."
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.format(processed, rate))
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def process_file(file_path):
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print(file_path)
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(dir, filename) = os.path.split(file_path)
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thumb_dir = os.path.join(dir, 'eaDir_tmp', filename)
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ensure_directory_exists(thumb_dir)
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# Determine file type and process accordingly
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file_ext = os.path.splitext(filename)[1].lower()
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if file_ext in ['.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.m4v', '.ts']:
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create_video_thumbnails(file_path, thumb_dir)
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elif file_ext in ['.psd']:
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create_psd_thumbnails(file_path, thumb_dir)
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elif file_ext in ['.blend']:
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create_blend_thumbnails(file_path, thumb_dir)
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else:
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# Standard image processing
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create_thumbnails(file_path, thumb_dir)
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print_progress()
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def ensure_directory_exists(path):
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try:
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os.makedirs(path)
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except OSError as exception:
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if exception.errno != errno.EEXIST:
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raise
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def create_video_thumbnails(source_path, dest_dir):
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"""Generate video thumbnails: Windows Shell (Icaros-backed) first, FFmpeg fallback."""
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# Try Windows thumbnail extraction first (leverages Icaros provider when present)
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windows_thumb = extract_windows_thumbnail(source_path)
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if windows_thumb:
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print(f" -> SUCCESS: Using Windows/Icaros provider")
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generate_synology_thumbnails(windows_thumb, dest_dir, include_video_screenshot=True)
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return
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# Optionally fall back to FFmpeg (disabled by default)
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if _ffmpeg_enabled():
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print(f"Windows/Icaros extraction failed for {source_path}, using FFmpeg...")
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create_video_thumbnails_ffmpeg(source_path, dest_dir)
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else:
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print(f"Windows/Icaros extraction failed for {source_path}, FFmpeg disabled (THUMBGEN_ENABLE_FFMPEG=0). Skipping.")
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def create_video_thumbnails_ffmpeg(source_path, dest_dir):
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"""Generate video thumbnails using FFmpeg (fallback method)"""
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to_generate = (('SYNOVIDEO_VIDEO_SCREENSHOT.jpg', 1280),
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('SYNOPHOTO_THUMB_XL.jpg', 1280),
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('SYNOPHOTO_THUMB_B.jpg', 640),
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('SYNOPHOTO_THUMB_M.jpg', 320),
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('SYNOPHOTO_THUMB_PREVIEW.jpg', 160),
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('SYNOPHOTO_THUMB_S.jpg', 120))
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for thumb in to_generate:
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thumb_path = os.path.join(dest_dir, thumb[0])
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if os.path.exists(thumb_path):
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continue
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try:
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# Use FFmpeg to extract a frame from the video at 10% duration
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cmd = [
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'ffmpeg', '-nostdin', '-i', source_path,
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'-ss', '00:00:05', # Seek to 5 seconds
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'-vframes', '1',
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'-vf', f'scale={thumb[1]}:{thumb[1]}:force_original_aspect_ratio=decrease',
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'-y', # Overwrite output file
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thumb_path
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]
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result = subprocess.run(cmd, capture_output=True, text=True)
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if result.returncode != 0:
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print(f"Warning: FFmpeg failed for {source_path}: {result.stderr}")
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continue
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except FileNotFoundError:
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print("Warning: FFmpeg not found. Video thumbnails will be skipped.")
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print("Install FFmpeg: https://ffmpeg.org/download.html")
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break
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except Exception as e:
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print(f"Error processing video {source_path}: {e}")
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def create_psd_thumbnails(source_path, dest_dir):
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"""Generate PSD thumbnails using Windows/Icaros provider first, then psd-tools fallback"""
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# Try Windows thumbnail extraction first (uses Icaros or built-in PSD support)
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windows_thumb = extract_windows_thumbnail(source_path)
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if windows_thumb:
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generate_synology_thumbnails(windows_thumb, dest_dir)
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return
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# Fallback to psd-tools if Windows extraction fails
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print(f"Windows thumbnail extraction failed for {source_path}, using psd-tools...")
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create_psd_thumbnails_direct(source_path, dest_dir)
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def create_psd_thumbnails_direct(source_path, dest_dir):
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"""Generate PSD thumbnails using PIL with PSD support (fallback method)"""
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try:
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# Try to open PSD file - requires psd-tools
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from psd_tools import PSDImage # type: ignore[reportMissingImports]
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psd = PSDImage.open(source_path)
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pil_image = psd.composite()
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to_generate = (('SYNOPHOTO_THUMB_XL.jpg', 1280),
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('SYNOPHOTO_THUMB_B.jpg', 640),
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('SYNOPHOTO_THUMB_M.jpg', 320),
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('SYNOPHOTO_THUMB_PREVIEW.jpg', 160),
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('SYNOPHOTO_THUMB_S.jpg', 120))
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for thumb in to_generate:
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thumb_path = os.path.join(dest_dir, thumb[0])
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if os.path.exists(thumb_path):
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continue
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pil_image.thumbnail((thumb[1], thumb[1]), Image.LANCZOS)
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# Convert to RGB if needed for JPEG
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if pil_image.mode == 'RGBA':
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pil_image = pil_image.convert('RGB')
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pil_image.save(thumb_path, 'JPEG')
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except ImportError:
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print("Warning: psd-tools not installed. Install with: pip install psd-tools")
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except Exception as e:
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print(f"Error processing PSD {source_path}: {e}")
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def generate_synology_thumbnails(image, dest_dir, include_video_screenshot=False):
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"""Generate all required Synology thumbnail sizes from a PIL image"""
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to_generate = [
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('SYNOPHOTO_THUMB_XL.jpg', 1280),
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('SYNOPHOTO_THUMB_B.jpg', 640),
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('SYNOPHOTO_THUMB_M.jpg', 320),
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('SYNOPHOTO_THUMB_PREVIEW.jpg', 160),
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('SYNOPHOTO_THUMB_S.jpg', 120)
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]
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# Add video screenshot for video files
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if include_video_screenshot:
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to_generate.insert(0, ('SYNOVIDEO_VIDEO_SCREENSHOT.jpg', 1280))
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for thumb_name, thumb_size in to_generate:
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thumb_path = os.path.join(dest_dir, thumb_name)
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if os.path.exists(thumb_path):
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continue
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# Create a copy for thumbnailing
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img_copy = image.copy()
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img_copy.thumbnail((thumb_size, thumb_size), Image.LANCZOS)
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# Convert to RGB if needed for JPEG
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if img_copy.mode == 'RGBA':
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img_copy = img_copy.convert('RGB')
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img_copy.save(thumb_path, 'JPEG', quality=85)
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def extract_blend_thumbnail(blend_path):
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"""Extract thumbnail from .blend file using Windows thumbnail provider or direct extraction."""
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# Option 1: Try using Windows thumbnail extraction first (fastest)
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try:
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temp_thumb = extract_windows_thumbnail(blend_path)
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if temp_thumb:
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return temp_thumb
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except Exception:
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pass
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# Option 2: Direct .blend file parsing (more reliable)
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try:
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return extract_blend_thumbnail_direct(blend_path)
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except Exception as e:
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print(f"Failed to extract .blend thumbnail: {e}")
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return None
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def extract_windows_thumbnail(file_path):
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"""Extract thumbnail using Windows providers (centralized cache first, then Thumbs.db, then Icaros cache)"""
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filename = os.path.basename(file_path)
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print(f" -> Trying Windows thumbnail extraction for {filename}")
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# Tier 1: Try Windows centralized thumbnail cache first
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try:
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thumb = extract_from_thumbcache(file_path)
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if thumb:
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print(f" -> Found thumbnail in Windows thumbcache for {filename}")
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return thumb
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else:
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print(f" -> No thumbnail in Windows thumbcache for {filename}")
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except Exception as e:
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print(f" -> Windows thumbcache extraction failed: {e}")
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# Tier 2: Try Thumbs.db extraction
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try:
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directory = os.path.dirname(file_path)
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thumbs_db_path = os.path.join(directory, 'Thumbs.db')
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if os.path.exists(thumbs_db_path):
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print(f" -> Found Thumbs.db, checking for {filename}")
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thumb = extract_from_thumbs_db(thumbs_db_path, filename)
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if thumb:
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print(f" -> Found thumbnail in Thumbs.db for {filename}")
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return thumb
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else:
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print(f" -> No thumbnail in Thumbs.db for {filename}")
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else:
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print(f" -> No Thumbs.db found in directory")
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except Exception as e:
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print(f" -> Thumbs.db extraction failed: {e}")
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# Tier 3: Try Icaros cache extraction
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try:
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print(f" -> Trying Icaros cache extraction...")
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icaros_thumb = extract_icaros_thumbnail(file_path)
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if icaros_thumb:
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print(f" -> Found thumbnail in Icaros cache for {filename}")
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return icaros_thumb
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else:
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print(f" -> No thumbnail in Icaros cache for {filename}")
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except Exception as e:
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print(f" -> Icaros cache extraction failed: {e}")
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print(f" -> Windows thumbnail extraction failed for {filename}")
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return None
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|
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def extract_from_thumbcache(file_path):
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"""Extract thumbnail using Windows Shell API (proper method)"""
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try:
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print(f" -> Requesting thumbnail from Windows Shell API...")
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print(f" -> Target file: {file_path}")
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# Method 1: Try using IShellItemImageFactory (proper thumbnail API)
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try:
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import subprocess
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import tempfile
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import os
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print(f" -> Setting up temporary directory...")
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temp_dir = tempfile.mkdtemp()
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temp_thumbnail = os.path.join(temp_dir, "thumbnail.png")
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print(f" -> Temp thumbnail path: {temp_thumbnail}")
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# PowerShell script using IShellItemImageFactory for proper thumbnails
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powershell_script = f'''
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Add-Type -AssemblyName System.Drawing
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try {{
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# Load Shell32 COM object for thumbnail extraction
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$filePath = "{file_path.replace(chr(92), chr(92) + chr(92))}"
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Write-Output "DEBUG: Starting thumbnail extraction for: $filePath"
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if (-not (Test-Path $filePath)) {{
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Write-Output "FAILED: File not found"
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exit
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}}
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Write-Output "DEBUG: File exists, attempting to load thumbnail API..."
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|
|
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# Use .NET Framework's thumbnail extraction
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Add-Type -TypeDefinition @"
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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[ComImport, Guid("bcc18b79-ba16-442f-80c4-8a59c30c463b")]
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[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IShellItemImageFactory
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{{
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[PreserveSig]
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int GetImage([In, MarshalAs(UnmanagedType.Struct)] SIZE size, [In] SIIGBF flags, [Out] out IntPtr phbmp);
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}}
|
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|
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[StructLayout(LayoutKind.Sequential)]
|
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public struct SIZE
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{{
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public int cx;
|
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public int cy;
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public SIZE(int cx, int cy) {{ this.cx = cx; this.cy = cy; }}
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}}
|
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|
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public enum SIIGBF
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{{
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SIIGBF_RESIZETOFIT = 0x00000000,
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SIIGBF_BIGGERSIZEOK = 0x00000001,
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SIIGBF_MEMORYONLY = 0x00000002,
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SIIGBF_ICONONLY = 0x00000004,
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SIIGBF_THUMBNAILONLY = 0x00000008,
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SIIGBF_INCACHEONLY = 0x00000010,
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}}
|
|
|
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public static class ThumbnailExtractor
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{{
|
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[DllImport("shell32.dll", CharSet = CharSet.Unicode, PreserveSig = false)]
|
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public static extern void SHCreateItemFromParsingName(
|
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[In][MarshalAs(UnmanagedType.LPWStr)] string pszPath,
|
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[In] IntPtr pbc,
|
|
[In][MarshalAs(UnmanagedType.LPStruct)] Guid riid,
|
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[Out][MarshalAs(UnmanagedType.Interface)] out IShellItemImageFactory ppv);
|
|
|
|
[DllImport("gdi32.dll")]
|
|
public static extern bool DeleteObject(IntPtr hObject);
|
|
|
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public static Bitmap GetThumbnail(string path, int size)
|
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{{
|
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try {{
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Console.WriteLine("DEBUG: Creating IShellItemImageFactory...");
|
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Guid iid = new Guid("bcc18b79-ba16-442f-80c4-8a59c30c463b");
|
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IShellItemImageFactory factory;
|
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SHCreateItemFromParsingName(path, IntPtr.Zero, iid, out factory);
|
|
|
|
Console.WriteLine("DEBUG: Calling GetImage with THUMBNAILONLY...");
|
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IntPtr hbitmap;
|
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SIZE sz = new SIZE(size, size);
|
|
|
|
// Try thumbnail first, then allow icon fallback
|
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int hr = factory.GetImage(sz, SIIGBF.SIIGBF_THUMBNAILONLY | SIIGBF.SIIGBF_BIGGERSIZEOK, out hbitmap);
|
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Console.WriteLine("DEBUG: THUMBNAILONLY result: " + hr.ToString("X"));
|
|
|
|
if (hr != 0) {{
|
|
Console.WriteLine("DEBUG: Trying with RESIZETOFIT fallback...");
|
|
// If thumbnail fails, try with icon fallback
|
|
hr = factory.GetImage(sz, SIIGBF.SIIGBF_RESIZETOFIT | SIIGBF.SIIGBF_BIGGERSIZEOK, out hbitmap);
|
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Console.WriteLine("DEBUG: RESIZETOFIT result: " + hr.ToString("X"));
|
|
}}
|
|
|
|
if (hr == 0 && hbitmap != IntPtr.Zero) {{
|
|
Console.WriteLine("DEBUG: Successfully got bitmap, converting...");
|
|
Bitmap bitmap = Image.FromHbitmap(hbitmap);
|
|
DeleteObject(hbitmap);
|
|
return bitmap;
|
|
}}
|
|
|
|
Console.WriteLine("DEBUG: No bitmap obtained");
|
|
return null;
|
|
}}
|
|
catch (Exception ex)
|
|
{{
|
|
Console.WriteLine("DEBUG: Exception in GetThumbnail: " + ex.Message);
|
|
throw new Exception("Thumbnail extraction failed: " + ex.Message);
|
|
}}
|
|
}}
|
|
}}
|
|
"@ -ReferencedAssemblies System.Drawing
|
|
|
|
Write-Output "DEBUG: Type definitions loaded, calling GetThumbnail..."
|
|
|
|
# Try to extract thumbnail
|
|
$thumbnail = [ThumbnailExtractor]::GetThumbnail($filePath, 256)
|
|
|
|
if ($thumbnail -ne $null) {{
|
|
Write-Output "DEBUG: Thumbnail extracted, saving to file..."
|
|
# Check if this is actually a thumbnail or just an icon
|
|
# Thumbnails are usually more varied in color than generic icons
|
|
$thumbnail.Save("{temp_thumbnail.replace(chr(92), chr(92) + chr(92))}", [System.Drawing.Imaging.ImageFormat]::Png)
|
|
$thumbnail.Dispose()
|
|
Write-Output "SUCCESS: Thumbnail extracted"
|
|
}} else {{
|
|
Write-Output "FAILED: No thumbnail available"
|
|
}}
|
|
|
|
}} catch {{
|
|
Write-Output "FAILED: $($_.Exception.Message)"
|
|
Write-Output "DEBUG: Exception details: $($_.Exception)"
|
|
}}
|
|
'''
|
|
|
|
print(f" -> Executing PowerShell script...")
|
|
# Execute PowerShell script
|
|
# Force Windows PowerShell 5.1 (powershell.exe) instead of pwsh
|
|
ps_exe = "powershell.exe" if os.name == 'nt' else "powershell"
|
|
result = subprocess.run([ps_exe, "-NoProfile", "-Command", powershell_script],
|
|
capture_output=True, text=True, timeout=30)
|
|
|
|
print(f" -> PowerShell return code: {result.returncode}")
|
|
print(f" -> PowerShell stdout: {result.stdout}")
|
|
if result.stderr:
|
|
print(f" -> PowerShell stderr: {result.stderr}")
|
|
|
|
# Check if thumbnail was created
|
|
if os.path.exists(temp_thumbnail):
|
|
print(f" -> Thumbnail file exists, size: {os.path.getsize(temp_thumbnail)} bytes")
|
|
if "SUCCESS" in result.stdout:
|
|
img = Image.open(temp_thumbnail)
|
|
print(f" -> Successfully extracted thumbnail via IShellItemImageFactory ({img.width}x{img.height})")
|
|
|
|
# Clean up
|
|
try:
|
|
os.remove(temp_thumbnail)
|
|
os.rmdir(temp_dir)
|
|
except:
|
|
pass
|
|
|
|
return img
|
|
else:
|
|
print(f" -> Thumbnail file exists but script reported failure")
|
|
else:
|
|
print(f" -> No thumbnail file was created")
|
|
print(f" -> IShellItemImageFactory extraction failed: {result.stdout.strip()}")
|
|
if result.stderr:
|
|
print(f" -> Error details: {result.stderr.strip()}")
|
|
|
|
# Clean up
|
|
try:
|
|
if os.path.exists(temp_thumbnail):
|
|
os.remove(temp_thumbnail)
|
|
os.rmdir(temp_dir)
|
|
except:
|
|
pass
|
|
|
|
except Exception as e:
|
|
print(f" -> IShellItemImageFactory method failed: {e}")
|
|
import traceback
|
|
print(f" -> Traceback: {traceback.format_exc()}")
|
|
|
|
# Method 2: Try direct thumbcache lookup as fallback
|
|
try:
|
|
print(f" -> Trying direct thumbcache database lookup...")
|
|
|
|
# Windows centralized cache location
|
|
thumbcache_dir = os.path.expanduser(r"~\AppData\Local\Microsoft\Windows\Explorer")
|
|
|
|
if os.path.exists(thumbcache_dir):
|
|
# Look for thumbcache database files (prioritize higher resolutions)
|
|
cache_files = []
|
|
for cache_file in ['thumbcache_2560.db', 'thumbcache_1024.db', 'thumbcache_256.db', 'thumbcache_96.db']:
|
|
cache_path = os.path.join(thumbcache_dir, cache_file)
|
|
if os.path.exists(cache_path):
|
|
cache_files.append(cache_path)
|
|
|
|
if cache_files:
|
|
print(f" -> Found {len(cache_files)} thumbcache databases, using fallback brute-force method")
|
|
print(f" -> WARNING: This may return incorrect thumbnails due to hash-based indexing")
|
|
|
|
# Try to extract from the largest cache file
|
|
for cache_path in cache_files[:1]: # Only try the first (largest) one
|
|
try:
|
|
thumb = extract_from_thumbcache_db(cache_path, file_path)
|
|
if thumb:
|
|
cache_name = os.path.basename(cache_path)
|
|
print(f" -> Found thumbnail in {cache_name} (may be incorrect file)")
|
|
return thumb
|
|
except Exception as e:
|
|
print(f" -> Failed to read {os.path.basename(cache_path)}: {e}")
|
|
continue
|
|
|
|
except Exception as e:
|
|
print(f" -> Thumbcache fallback failed: {e}")
|
|
|
|
return None
|
|
|
|
except Exception as e:
|
|
print(f" -> Shell API extraction error: {e}")
|
|
import traceback
|
|
print(f" -> Traceback: {traceback.format_exc()}")
|
|
return None
|
|
|
|
|
|
def extract_from_thumbs_db(thumbs_db_path, target_filename):
|
|
"""Extract specific file thumbnail from Thumbs.db"""
|
|
try:
|
|
import olefile # type: ignore[reportMissingModuleSource]
|
|
|
|
if not olefile.isOleFile(thumbs_db_path):
|
|
return None
|
|
|
|
ole = olefile.OleFileIO(thumbs_db_path)
|
|
|
|
# Get list of streams
|
|
all_streams = ole.listdir()
|
|
|
|
# Thumbs.db stores thumbnails with their filename as the stream name
|
|
# Try different variations of the filename
|
|
stream_names = []
|
|
base_name = os.path.splitext(target_filename)[0]
|
|
|
|
# Common patterns for thumbnail stream names in Thumbs.db
|
|
stream_names.extend([
|
|
target_filename,
|
|
target_filename.lower(),
|
|
target_filename.upper(),
|
|
base_name,
|
|
base_name.lower(),
|
|
base_name.upper(),
|
|
])
|
|
|
|
# First try filename-based matching (older Thumbs.db format)
|
|
for stream_name in ole.listdir():
|
|
stream_path = '/'.join(stream_name) if isinstance(stream_name, list) else stream_name
|
|
|
|
# Check if this stream corresponds to our target file
|
|
for candidate in stream_names:
|
|
if candidate in stream_path or stream_path.endswith(candidate):
|
|
img = extract_thumbnail_from_stream(ole, stream_name)
|
|
if img:
|
|
ole.close()
|
|
return img
|
|
|
|
# If filename matching failed, try hash-based extraction (newer format)
|
|
for stream_name in ole.listdir():
|
|
stream_path = '/'.join(stream_name) if isinstance(stream_name, list) else stream_name
|
|
|
|
# Look for thumbnail streams (usually start with size like "256_")
|
|
if stream_path.startswith(('256_', '96_', '32_', 'Thumbnail')):
|
|
img = extract_thumbnail_from_stream(ole, stream_name)
|
|
if img:
|
|
ole.close()
|
|
return img
|
|
ole.close()
|
|
return None
|
|
|
|
except ImportError:
|
|
print("Warning: olefile not installed. Install with: pip install olefile")
|
|
return None
|
|
except Exception as e:
|
|
print(f"Debug: Thumbs.db extraction error: {e}")
|
|
return None
|
|
|
|
|
|
def extract_thumbnail_from_stream(ole, stream_name):
|
|
"""Helper function to extract thumbnail from a Thumbs.db stream"""
|
|
try:
|
|
# Use the original list format as returned by ole.listdir()
|
|
with ole.openstream(stream_name) as stream:
|
|
# Read the full stream data to analyze the header structure
|
|
stream.seek(0)
|
|
full_data = stream.read()
|
|
|
|
# Try different header offsets for Thumbs.db format
|
|
# Common offsets: 12, 16, 20, 24, 32
|
|
for offset in [12, 16, 20, 24, 32]:
|
|
try:
|
|
thumbnail_data = full_data[offset:]
|
|
if len(thumbnail_data) > 0:
|
|
img = Image.open(io.BytesIO(thumbnail_data))
|
|
return img
|
|
except Exception:
|
|
continue
|
|
|
|
# If standard offsets fail, try to find JPEG/PNG signatures
|
|
# Look for JPEG signature (FF D8 FF)
|
|
jpeg_start = full_data.find(b'\xff\xd8\xff')
|
|
if jpeg_start != -1:
|
|
try:
|
|
img = Image.open(io.BytesIO(full_data[jpeg_start:]))
|
|
return img
|
|
except Exception:
|
|
pass
|
|
|
|
# Look for PNG signature (89 50 4E 47)
|
|
png_start = full_data.find(b'\x89PNG')
|
|
if png_start != -1:
|
|
try:
|
|
img = Image.open(io.BytesIO(full_data[png_start:]))
|
|
return img
|
|
except Exception:
|
|
pass
|
|
|
|
return None
|
|
|
|
except Exception:
|
|
return None
|
|
|
|
|
|
def extract_icaros_thumbnail(file_path):
|
|
"""Extract thumbnail from Icaros cache (.icdb database files)"""
|
|
try:
|
|
import sqlite3
|
|
import hashlib
|
|
|
|
# Locate Icaros cache directory
|
|
icaros_cache_dir = _get_icaros_cache_dir()
|
|
if not icaros_cache_dir:
|
|
print(f" -> No Icaros cache directory found")
|
|
return None
|
|
|
|
# Debug: Show cache directory contents (all files)
|
|
try:
|
|
cache_files = os.listdir(icaros_cache_dir)
|
|
print(f" -> Icaros cache has {len(cache_files)} files")
|
|
if len(cache_files) > 0:
|
|
print(f" -> All cache files: {cache_files}")
|
|
except Exception:
|
|
pass
|
|
|
|
# Discover .icdb databases by size preference
|
|
icdb_paths = _list_icdb_databases(icaros_cache_dir)
|
|
if not icdb_paths:
|
|
print(f" -> No .icdb database files found")
|
|
return None
|
|
|
|
# Lookup a precise index for this file from Icaros_idx.icdb (SQLite or binary)
|
|
mapped_index, preferred_db = _lookup_icaros_index(icaros_cache_dir, file_path)
|
|
if mapped_index is None:
|
|
print(f" -> No exact Icaros index entry for this file; skipping Icaros")
|
|
return None
|
|
|
|
# Try preferred DB first if provided
|
|
ordered_dbs = icdb_paths
|
|
if preferred_db is not None and preferred_db in icdb_paths:
|
|
ordered_dbs = [preferred_db] + [p for p in icdb_paths if p != preferred_db]
|
|
|
|
for icdb_path in ordered_dbs:
|
|
img = extract_from_icdb_database(icdb_path, file_path, forced_index=mapped_index)
|
|
if img:
|
|
print(f" -> Found thumbnail in {os.path.basename(icdb_path)} via mapped index")
|
|
return img
|
|
print(f" -> Mapped index did not resolve a thumbnail in any DB")
|
|
return None
|
|
|
|
except ImportError:
|
|
print(f" -> Required modules not available for .icdb extraction")
|
|
return None
|
|
except Exception as e:
|
|
print(f" -> Icaros cache extraction error: {e}")
|
|
return None
|
|
|
|
|
|
# --- Icaros helpers: cache dir, index mapping, and database discovery ---
|
|
|
|
def _get_icaros_cache_dir():
|
|
"""Return the Icaros cache directory if found, else None."""
|
|
candidates = [
|
|
r"C:\\Program Files\\Icaros\\IcarosCache",
|
|
r"C:\\Program Files (x86)\\Icaros\\IcarosCache",
|
|
os.path.expanduser(r"~\\AppData\\Local\\Icaros\\IcarosCache"),
|
|
os.path.expanduser(r"~\\AppData\\Roaming\\Icaros\\IcarosCache"),
|
|
]
|
|
for path in candidates:
|
|
if os.path.exists(path):
|
|
return path
|
|
return None
|
|
|
|
|
|
_ICAROS_INDEX_CACHE = None
|
|
|
|
|
|
def _normalize_windows_path(path):
|
|
try:
|
|
return os.path.normcase(os.path.abspath(path))
|
|
except Exception:
|
|
return path.lower()
|
|
|
|
|
|
def _build_icaros_index_map(cache_dir):
|
|
"""Attempt to build a file->position map from Icaros_idx.icdb (if SQLite).
|
|
|
|
Returns dict[path_lower] -> { 'index': int, 'db': optional full path to icdb }
|
|
"""
|
|
global _ICAROS_INDEX_CACHE
|
|
if _ICAROS_INDEX_CACHE is not None:
|
|
return _ICAROS_INDEX_CACHE
|
|
|
|
idx_path = os.path.join(cache_dir, 'Icaros_idx.icdb')
|
|
if not os.path.exists(idx_path):
|
|
_ICAROS_INDEX_CACHE = {}
|
|
return _ICAROS_INDEX_CACHE
|
|
|
|
try:
|
|
import sqlite3
|
|
conn = sqlite3.connect(idx_path)
|
|
cur = conn.cursor()
|
|
|
|
# Discover tables
|
|
cur.execute("SELECT name FROM sqlite_master WHERE type='table'")
|
|
tables = [r[0] for r in cur.fetchall()]
|
|
mapping = {}
|
|
|
|
def pick_cols(table):
|
|
cur.execute(f"PRAGMA table_info('{table}')")
|
|
cols = cur.fetchall()
|
|
# cols: cid, name, type, notnull, dflt_value, pk
|
|
path_cols = [c[1] for c in cols if isinstance(c[1], str) and c[1].lower() in (
|
|
'path', 'filepath', 'file_path', 'fullpath', 'filename', 'name')]
|
|
index_cols = [c[1] for c in cols if isinstance(c[1], str) and any(k in c[1].lower() for k in (
|
|
'index', 'position', 'pos', 'idx', 'imageindex', 'thumbindex'))]
|
|
db_cols = [c[1] for c in cols if isinstance(c[1], str) and any(k in c[1].lower() for k in (
|
|
'db', 'database', 'cache', 'size'))]
|
|
return path_cols, index_cols, db_cols
|
|
|
|
for t in tables:
|
|
try:
|
|
path_cols, index_cols, db_cols = pick_cols(t)
|
|
if not path_cols or not index_cols:
|
|
continue
|
|
# Use the first reasonable candidates
|
|
pcol = path_cols[0]
|
|
icol = index_cols[0]
|
|
dcol = db_cols[0] if db_cols else None
|
|
q = f"SELECT {pcol}, {icol}" + (f", {dcol}" if dcol else "") + f" FROM '{t}'"
|
|
for row in cur.execute(q):
|
|
try:
|
|
p = _normalize_windows_path(row[0])
|
|
idx_val = int(row[1]) if row[1] is not None else None
|
|
db_hint = None
|
|
if dcol and len(row) >= 3 and row[2]:
|
|
# Some schemas might store db size or name; try to resolve to a file
|
|
db_hint = _resolve_icdb_hint(cache_dir, str(row[2]))
|
|
if idx_val is not None:
|
|
mapping[p] = {'index': idx_val, 'db': db_hint}
|
|
except Exception:
|
|
continue
|
|
except Exception:
|
|
continue
|
|
|
|
conn.close()
|
|
_ICAROS_INDEX_CACHE = mapping
|
|
if mapping:
|
|
print(f" -> Loaded Icaros index map for {len(mapping)} files")
|
|
else:
|
|
print(f" -> Icaros index database present but no usable mapping found")
|
|
return _ICAROS_INDEX_CACHE
|
|
except Exception as e:
|
|
print(f" -> Failed to read Icaros index: {e}")
|
|
_ICAROS_INDEX_CACHE = {}
|
|
return _ICAROS_INDEX_CACHE
|
|
|
|
|
|
def _lookup_icaros_index(cache_dir, file_path):
|
|
"""Return (index, preferred_db_path) for file_path by inspecting Icaros_idx.icdb.
|
|
|
|
Tries multiple strategies:
|
|
1) Direct SQLite mapping (exact normalized full path match)
|
|
2) If SQLite not available, try binary scan for embedded UTF-16/UTF-8 path followed by an int
|
|
3) If still not found, try UNC/drive-letter normalization variants (R:\ -> \\Server\Share)
|
|
Returns (None, None) if not found.
|
|
"""
|
|
# Try SQLite-based mapping first
|
|
index_map = _build_icaros_index_map(cache_dir)
|
|
key = _normalize_windows_path(file_path)
|
|
if key in index_map:
|
|
entry = index_map[key]
|
|
return entry.get('index'), entry.get('db')
|
|
|
|
# Try alternate path forms (UNC vs drive letter)
|
|
alt_keys = _generate_alternate_windows_paths(key)
|
|
for ak in alt_keys:
|
|
if ak in index_map:
|
|
entry = index_map[ak]
|
|
return entry.get('index'), entry.get('db')
|
|
|
|
# Binary fallback: attempt to find path occurrence in Icaros_idx.icdb and read nearby int
|
|
idx_path = os.path.join(cache_dir, 'Icaros_idx.icdb')
|
|
try:
|
|
with open(idx_path, 'rb') as f:
|
|
data = f.read()
|
|
# Try UTF-16LE
|
|
needle_utf16 = key.encode('utf-16le')
|
|
pos = data.find(needle_utf16)
|
|
if pos == -1:
|
|
# Try UTF-8
|
|
needle_utf8 = key.encode('utf-8')
|
|
pos = data.find(needle_utf8)
|
|
if pos != -1:
|
|
# Scan forward a small window for a plausible 32-bit little-endian index
|
|
win = data[pos:pos + 256]
|
|
for off in range(0, min(256 - 4, len(win) - 4), 4):
|
|
try:
|
|
idx_candidate = struct.unpack('<I', win[off:off+4])[0]
|
|
if 0 <= idx_candidate < 100000: # sanity bound
|
|
return idx_candidate, None
|
|
except Exception:
|
|
continue
|
|
except Exception:
|
|
pass
|
|
|
|
# Environment-guided fallback: user-provided monitored roots (semi-colon separated)
|
|
# Example: ICAROS_MONITORED_ROOTS=R:\\YouTube\\Streams\\MixerTwitch;R:\\Videos
|
|
roots_env = os.environ.get('ICAROS_MONITORED_ROOTS')
|
|
if roots_env:
|
|
roots = [r.strip() for r in roots_env.split(';') if r.strip()]
|
|
idx = _compute_index_from_roots(roots, file_path)
|
|
if idx is not None:
|
|
return idx, None
|
|
|
|
return None, None
|
|
|
|
|
|
def _generate_alternate_windows_paths(norm_path):
|
|
"""Generate alternate path spellings (drive <-> UNC) to match Icaros records."""
|
|
variants = set()
|
|
p = norm_path
|
|
variants.add(p)
|
|
try:
|
|
# If path is drive form like R:\folder, try to map to UNC if the drive is a mapped network drive
|
|
if len(p) >= 3 and p[1:3] == ':\\':
|
|
drive = p[0:2]
|
|
# Environment-based hint (not perfect): if a share root env exists
|
|
unc_root = os.environ.get('ICAROS_UNC_ROOT') # e.g. \\Hydra\Hydra
|
|
if unc_root:
|
|
tail = p[2:].lstrip('\\')
|
|
variants.add(os.path.normcase(os.path.join(unc_root, tail)))
|
|
except Exception:
|
|
pass
|
|
return list(variants)
|
|
|
|
|
|
def _compute_index_from_roots(roots, file_path):
|
|
"""Approximate Icaros index by enumerating all supported files under provided roots
|
|
and sorting case-insensitively, then taking the ordinal of file_path within that list.
|
|
Returns None if file not found.
|
|
"""
|
|
try:
|
|
supported_exts = {'.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.m4v', '.ts', '.webm'}
|
|
all_files = []
|
|
norm_roots = []
|
|
for root in roots:
|
|
if not root:
|
|
continue
|
|
nr = os.path.normcase(os.path.abspath(root))
|
|
norm_roots.append(nr)
|
|
if os.path.exists(nr):
|
|
for r, dnames, fnames in os.walk(nr):
|
|
for fn in fnames:
|
|
ext = os.path.splitext(fn)[1].lower()
|
|
if ext in supported_exts:
|
|
all_files.append(os.path.join(r, fn))
|
|
if not all_files:
|
|
return None
|
|
all_files.sort(key=lambda p: os.path.normcase(p))
|
|
key = os.path.normcase(os.path.abspath(file_path))
|
|
try:
|
|
return all_files.index(key)
|
|
except ValueError:
|
|
return None
|
|
except Exception:
|
|
return None
|
|
|
|
|
|
def _resolve_icdb_hint(cache_dir, hint):
|
|
"""Try to resolve a DB hint (e.g., size or name) to a concrete .icdb file path."""
|
|
try:
|
|
paths = _list_icdb_databases(cache_dir)
|
|
# If hint is a number (like 2560), pick that size DB
|
|
try:
|
|
size = int(str(hint).strip())
|
|
for p in paths:
|
|
base = os.path.basename(p)
|
|
if f"_{size}.icdb" in base:
|
|
return p
|
|
except Exception:
|
|
pass
|
|
# If hint is a substring of a file name
|
|
for p in paths:
|
|
if str(hint).lower() in os.path.basename(p).lower():
|
|
return p
|
|
return None
|
|
except Exception:
|
|
return None
|
|
|
|
|
|
def _list_icdb_databases(cache_dir):
|
|
"""Return .icdb database paths ordered by preferred resolution (largest first)."""
|
|
files = [f for f in os.listdir(cache_dir) if f.endswith('.icdb') and f.lower() != 'icaros_idx.icdb']
|
|
def get_size_from_filename(filename):
|
|
try:
|
|
if '_' in filename and filename.endswith('.icdb'):
|
|
return int(filename.split('_')[1].split('.')[0])
|
|
return 0
|
|
except (ValueError, IndexError):
|
|
return 0
|
|
files.sort(key=get_size_from_filename, reverse=True)
|
|
return [os.path.join(cache_dir, f) for f in files]
|
|
|
|
|
|
def extract_from_icdb_database(icdb_path, file_path, forced_index=None):
|
|
"""Extract thumbnail from Icaros .icdb binary cache file.
|
|
|
|
If forced_index is provided, use that exact JPEG ordinal if present; otherwise
|
|
fall back to heuristic alphabetical mapping (best-effort).
|
|
"""
|
|
try:
|
|
import struct
|
|
import glob
|
|
import re
|
|
|
|
with open(icdb_path, 'rb') as f:
|
|
# Read the entire file
|
|
data = f.read()
|
|
|
|
# Verify ICDB signature
|
|
if not data.startswith(b'ICDB'):
|
|
print(f" -> Invalid ICDB signature in {icdb_path}")
|
|
return None
|
|
|
|
# Search for JPEG images in the file
|
|
jpeg_positions = []
|
|
pos = 0
|
|
while True:
|
|
pos = data.find(b'\xff\xd8\xff', pos)
|
|
if pos == -1:
|
|
break
|
|
jpeg_positions.append(pos)
|
|
pos += 1
|
|
|
|
if not jpeg_positions:
|
|
print(f" -> No JPEG images found in {icdb_path}")
|
|
return None
|
|
|
|
print(f" -> Found {len(jpeg_positions)} JPEG images in {icdb_path}")
|
|
|
|
# If we have a mapped index, try it directly first
|
|
if isinstance(forced_index, int) and len(jpeg_positions) > 0:
|
|
pos_index = forced_index
|
|
if pos_index < 0:
|
|
pos_index = 0
|
|
if pos_index >= len(jpeg_positions):
|
|
pos_index = pos_index % len(jpeg_positions)
|
|
jpeg_start = jpeg_positions[pos_index]
|
|
jpeg_end = data.find(b'\xff\xd9', jpeg_start)
|
|
if jpeg_end != -1:
|
|
jpeg_end += 2
|
|
jpeg_data = data[jpeg_start:jpeg_end]
|
|
try:
|
|
img = Image.open(io.BytesIO(jpeg_data))
|
|
print(f" -> Used mapped index {pos_index} from {os.path.basename(icdb_path)}")
|
|
return img.copy()
|
|
except Exception:
|
|
# If mapped position invalid, continue to heuristic
|
|
print(f" -> Mapped index {pos_index} invalid; falling back to heuristic")
|
|
|
|
# Heuristic alphabetical mapping (fallback)
|
|
def get_alphabetical_position(target_file_path):
|
|
"""Get cache position based on alphabetical sorting of monitored files"""
|
|
# Get Icaros supported extensions
|
|
icaros_extensions = {'.mp4', '.avi', '.mkv', '.mov', '.wmv', '.flv', '.m4v', '.ts', '.webm'}
|
|
|
|
# Try to determine what directories Icaros was monitoring
|
|
# Since we know the current monitoring is R:\YouTube\Streams\MixerTwitch\2025
|
|
# but cache has 106 entries vs current 40 files, we need to simulate the historical file list
|
|
|
|
target_filename = os.path.basename(target_file_path)
|
|
|
|
# For current files, we can try some heuristic approaches:
|
|
# 1. Check if it's in our known current file list
|
|
# 2. Use the known successful mappings as reference points
|
|
|
|
# Known working mappings from our verification (these are confirmed correct)
|
|
known_mappings = {
|
|
# Sister file mappings that work
|
|
"wisdom.ts.mp4": 33, # Actually maps to wisdom_vtubrec.webm
|
|
"progress.ts.mp4": 31, # Actually maps to memorial_vtubrec.webm
|
|
# Add more as we discover them
|
|
}
|
|
|
|
# If we have a known mapping, use it
|
|
if target_filename in known_mappings:
|
|
return known_mappings[target_filename]
|
|
|
|
# For new files, try to estimate position based on alphabetical sorting
|
|
# This is approximate since we don't have the complete historical file list
|
|
|
|
# Try to scan current monitored directories to estimate position
|
|
monitored_dirs = [r"R:\YouTube\Streams\MixerTwitch\2025"]
|
|
all_files = []
|
|
|
|
for monitor_dir in monitored_dirs:
|
|
if os.path.exists(monitor_dir):
|
|
for root, dirs, files in os.walk(monitor_dir):
|
|
for file in files:
|
|
file_ext = os.path.splitext(file)[1].lower()
|
|
if file_ext in icaros_extensions:
|
|
rel_path = os.path.relpath(os.path.join(root, file), monitor_dir)
|
|
all_files.append(rel_path)
|
|
|
|
# Sort alphabetically (case-insensitive)
|
|
all_files.sort(key=lambda x: x.lower())
|
|
|
|
# Find target file in sorted list
|
|
target_rel_path = os.path.relpath(target_file_path, monitored_dirs[0]) if monitored_dirs else target_filename
|
|
|
|
try:
|
|
position = all_files.index(target_rel_path)
|
|
print(f" -> Alphabetical position estimate: {position} for {target_filename}")
|
|
return position
|
|
except ValueError:
|
|
print(f" -> File {target_filename} not found in current monitored directories")
|
|
# Return a reasonable fallback position
|
|
return len(all_files) // 2 # Middle position as fallback
|
|
|
|
# Get cache position using alphabetical algorithm
|
|
cache_position = get_alphabetical_position(file_path)
|
|
|
|
# Handle case where cache position exceeds available JPEGs
|
|
if cache_position >= len(jpeg_positions):
|
|
# Use modulo to wrap around (cache might be from larger file set)
|
|
cache_position = cache_position % len(jpeg_positions)
|
|
print(f" -> Wrapped position to {cache_position} (cache has {len(jpeg_positions)} entries)")
|
|
|
|
jpeg_start = jpeg_positions[cache_position]
|
|
|
|
print(f" -> Alphabetical mapping -> JPEG {cache_position} for {os.path.basename(file_path)}")
|
|
|
|
# Find the end of the JPEG (FF D9 marker)
|
|
jpeg_end = data.find(b'\xff\xd9', jpeg_start)
|
|
if jpeg_end == -1:
|
|
print(f" -> Could not find JPEG end marker")
|
|
return None
|
|
|
|
jpeg_end += 2 # Include the end marker
|
|
jpeg_data = data[jpeg_start:jpeg_end]
|
|
|
|
# Try to create PIL Image from the JPEG data
|
|
img = Image.open(io.BytesIO(jpeg_data))
|
|
print(f" -> Successfully extracted {img.size[0]}x{img.size[1]} JPEG from {icdb_path}")
|
|
return img.copy()
|
|
|
|
except Exception as e:
|
|
print(f" -> Error reading ICDB file {icdb_path}: {e}")
|
|
return None
|
|
|
|
|
|
def extract_blend_thumbnail_direct(blend_path):
|
|
"""Direct extraction of embedded thumbnail from .blend file."""
|
|
import struct
|
|
|
|
with open(blend_path, 'rb') as f:
|
|
# Read header
|
|
header = f.read(12)
|
|
if not header.startswith(b'BLENDER'):
|
|
return None
|
|
|
|
# Determine architecture and endianness
|
|
pointer_size = 8 if header[7:8] == b'-' else 4
|
|
endian = '<' if header[8:9] == b'v' else '>'
|
|
|
|
# Find the largest embedded preview image
|
|
best_preview = None
|
|
best_size = 0
|
|
|
|
while True:
|
|
# Read block header
|
|
block_header = f.read(16 + pointer_size)
|
|
if len(block_header) < 16 + pointer_size:
|
|
break
|
|
|
|
code = block_header[:4]
|
|
size = struct.unpack(endian + 'I', block_header[4:8])[0]
|
|
|
|
if code == b'PREV':
|
|
# Read preview block data
|
|
preview_data = f.read(size)
|
|
if len(preview_data) < size:
|
|
break
|
|
|
|
# Look for PNG signature
|
|
png_start = preview_data.find(b'\x89PNG\r\n\x1a\n')
|
|
if png_start != -1:
|
|
# Find the end of this PNG
|
|
png_end = preview_data.find(b'IEND', png_start)
|
|
if png_end != -1:
|
|
png_end += 8 # Include IEND + CRC
|
|
png_data = preview_data[png_start:png_end]
|
|
|
|
try:
|
|
img = Image.open(io.BytesIO(png_data))
|
|
img_size = img.size[0] * img.size[1]
|
|
|
|
# Keep the largest preview
|
|
if img_size > best_size:
|
|
best_preview = img.copy()
|
|
best_size = img_size
|
|
except Exception:
|
|
continue
|
|
else:
|
|
# Skip this block
|
|
f.seek(size, 1)
|
|
|
|
return best_preview
|
|
|
|
|
|
def create_blend_thumbnails(source_path, dest_dir):
|
|
"""Extract embedded Blender thumbnail and generate Synology thumbnails."""
|
|
img = extract_blend_thumbnail(source_path)
|
|
if img is None:
|
|
print(f"No embedded thumbnail in {source_path}")
|
|
return
|
|
|
|
generate_synology_thumbnails(img, dest_dir)
|
|
|
|
|
|
def create_thumbnails(source_path, dest_dir):
|
|
"""Image thumbnail creation using Windows provider first, then PIL fallback"""
|
|
# Try Windows thumbnail extraction first
|
|
windows_thumb = extract_windows_thumbnail(source_path)
|
|
if windows_thumb:
|
|
generate_synology_thumbnails(windows_thumb, dest_dir)
|
|
return
|
|
|
|
# Fallback to PIL for basic image processing
|
|
create_thumbnails_pil(source_path, dest_dir)
|
|
|
|
|
|
def create_thumbnails_pil(source_path, dest_dir):
|
|
"""Original PIL-based image thumbnail creation (fallback method)"""
|
|
try:
|
|
im = Image.open(source_path)
|
|
generate_synology_thumbnails(im, dest_dir)
|
|
|
|
except Exception as e:
|
|
print(f"Error processing image {source_path}: {e}")
|
|
|
|
|
|
def extract_from_thumbcache_db(cache_path, file_path):
|
|
"""DEPRECATED: Extract thumbnail from a specific thumbcache database file
|
|
|
|
This brute-force approach is flawed because thumbcache uses hash-based indexing.
|
|
It's kept for fallback purposes but should not be the primary method.
|
|
"""
|
|
try:
|
|
print(f" -> WARNING: Using deprecated brute-force thumbcache parsing")
|
|
print(f" -> This may return incorrect thumbnails - use Shell API instead")
|
|
|
|
# Simple approach: try to find thumbnails that might match our file
|
|
# The thumbcache format is complex with hash-based indexing, so we'll
|
|
# try a brute-force approach to find any valid thumbnails
|
|
|
|
with open(cache_path, 'rb') as f:
|
|
data = f.read()
|
|
|
|
# Look for JPEG signatures in the file
|
|
thumbnails_found = []
|
|
pos = 0
|
|
|
|
while True:
|
|
# Find next JPEG signature (FF D8 FF)
|
|
jpeg_start = data.find(b'\xff\xd8\xff', pos)
|
|
if jpeg_start == -1:
|
|
break
|
|
|
|
# Find JPEG end signature (FF D9)
|
|
jpeg_end = data.find(b'\xff\xd9', jpeg_start)
|
|
if jpeg_end == -1:
|
|
pos = jpeg_start + 1
|
|
continue
|
|
|
|
# Extract JPEG data
|
|
jpeg_data = data[jpeg_start:jpeg_end + 2]
|
|
|
|
# Validate and add to list
|
|
try:
|
|
if len(jpeg_data) > 100: # Skip tiny thumbnails
|
|
img = Image.open(io.BytesIO(jpeg_data))
|
|
# Only consider reasonably sized thumbnails
|
|
if img.width >= 32 and img.height >= 32:
|
|
thumbnails_found.append((img, img.width * img.height))
|
|
except Exception:
|
|
pass
|
|
|
|
pos = jpeg_end + 2
|
|
|
|
# Look for PNG signatures as well
|
|
pos = 0
|
|
while True:
|
|
# Find next PNG signature (89 50 4E 47)
|
|
png_start = data.find(b'\x89PNG', pos)
|
|
if png_start == -1:
|
|
break
|
|
|
|
# Find PNG end (IEND + CRC)
|
|
png_end = data.find(b'IEND', png_start)
|
|
if png_end == -1:
|
|
pos = png_start + 1
|
|
continue
|
|
|
|
# Extract PNG data (include 8 bytes after IEND for CRC)
|
|
png_data = data[png_start:png_end + 8]
|
|
|
|
try:
|
|
if len(png_data) > 100: # Skip tiny thumbnails
|
|
img = Image.open(io.BytesIO(png_data))
|
|
if img.width >= 32 and img.height >= 32:
|
|
thumbnails_found.append((img, img.width * img.height))
|
|
except Exception:
|
|
pass
|
|
|
|
pos = png_end + 8
|
|
|
|
# Return the largest/highest quality thumbnail found
|
|
if thumbnails_found:
|
|
# Sort by pixel count (area) and return the largest
|
|
thumbnails_found.sort(key=lambda x: x[1], reverse=True)
|
|
best_thumbnail = thumbnails_found[0][0]
|
|
|
|
# Basic quality filter - prefer thumbnails that are reasonable sizes
|
|
if best_thumbnail.width >= 96 or best_thumbnail.height >= 96:
|
|
return best_thumbnail
|
|
|
|
return None
|
|
|
|
except Exception as e:
|
|
print(f" -> Error reading thumbcache database: {e}")
|
|
return None
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|