# SPDX-License-Identifier: BSD-2-Clause # # Copyright (C) 2019, Raspberry Pi Ltd # Copyright (C) 2022, Paul Elder <paul.elder@ideasonboard.com> # # utils.py - Utilities for libtuning import decimal import math import numpy as np import os from pathlib import Path import re import sys import libtuning as lt from libtuning.image import Image from libtuning.macbeth import locate_macbeth # Utility functions def eprint(*args, **kwargs): print(*args, file=sys.stderr, **kwargs) def get_module_by_type_name(modules, name): for module in modules: if module.type == name: return module return None # Private utility functions def _list_image_files(directory): d = Path(directory) files = [d.joinpath(f) for f in os.listdir(d) if re.search(r'\.(jp[e]g$)|(dng$)', f)] files.sort() return files def _parse_image_filename(fn: Path): result = re.search(r'^(alsc_)?(\d+)[kK]_(\d+)?[lLuU]?.\w{3,4}$', fn.name) if result is None: eprint(f'The file name of {fn.name} is incorrectly formatted') return None, None, None color = int(result.group(2)) lsc_only = result.group(1) is not None lux = None if lsc_only else int(result.group(3)) return color, lux, lsc_only # \todo Implement this from check_imgs() in ctt.py def _validate_images(images): return True # Public utility functions # @brief Load images into a single list of Image instances # @param input_dir Directory from which to load image files # @param config Configuration dictionary # @param load_nonlsc Whether or not to load non-lsc images # @param load_lsc Whether or not to load lsc-only images # @return A list of Image instances def load_images(input_dir: str, config: dict, load_nonlsc: bool, load_lsc: bool) -> list: files = _list_image_files(input_dir) if len(files) == 0: eprint(f'No images found in {input_dir}') return None images = [] for f in files: color, lux, lsc_only = _parse_image_filename(f) if color is None: continue # Skip lsc image if we don't need it if lsc_only and not load_lsc: eprint(f'Skipping {f.name} as this tuner has no LSC module') continue # Skip non-lsc image if we don't need it if not lsc_only and not load_nonlsc: eprint(f'Skipping {f.name} as this tuner only has an LSC module') continue # Load image try: image = Image(f) except Exception as e: eprint(f'Failed to load image {f.name}: {e}') continue # Populate simple fields image.lsc_only = lsc_only image.color = color image.lux = lux # Black level comes from the TIFF tags, but they are overridable by the # config file. if 'blacklevel' in config['general']: image.blacklevel_16 = config['general']['blacklevel'] if lsc_only: images.append(image) continue # Handle macbeth macbeth = locate_macbeth(config) if macbeth is None: continue images.append(image) if not _validate_images(images): return None return images