try:
    import pyloudnorm as pyln
    LOUDNESS_AVAILABLE = True
except ImportError:
    LOUDNESS_AVAILABLE = False


def compute_loudness(y, sr):
    """
    Compute integrated LUFS using pyloudnorm.
    Returns None if pyloudnorm is not installed or fails.
    """
    if not LOUDNESS_AVAILABLE:
        return None

    try:
        meter = pyln.Meter(sr)
        loudness = float(meter.integrated_loudness(y))
        return loudness
    except Exception:
        return None