cover_art.py 文件源码

def Waifu2xResize(src, width, height, targetWidth, targetHeight):
    resize_factor = 2 ** math.ceil(max(math.log2(targetHeight / height), math.log2(targetWidth / targetWidth)))
    logging.debug("w: {} h: {} tw: {} th: {} rf: {}".format(width, height, targetWidth, targetHeight, resize_factor))
    tmp = tempfile.mkstemp(suffix=".png", prefix="pmsync_cover_")
    try:
        subprocess.run(["waifu2x-converter-cpp",
                        "--scale_ratio", str(resize_factor),
                        "-m", "scale",
                        "-i", src,
                        "-o", tmp[1]],
                       check=True,
                       stdin=subprocess.DEVNULL,
                       stdout=subprocess.PIPE,
                       stderr=subprocess.PIPE)
    except subprocess.CalledProcessError as e:
        logging.debug("=== CalledProcessError ===")
        logging.debug("cmd: {}".format(e.cmd))
        logging.debug("output: {}".format(e.stdout.decode()))
        logging.debug("stderr: {}".format(e.stderr.decode()))
        logging.debug("=== CalledProcessError ===")
        os.remove(tmp[1])
    return PILResize(tmp[1], width*resize_factor, height*resize_factor, targetWidth, targetHeight)