io_utils.py

import soundfile as sf
import librosa
import numpy as np


def read_audio_info(path):
    """Read audio file metadata using soundfile.info"""
    info = sf.info(path)
    return {
        "samplerate": int(info.samplerate),
        "channels": int(info.channels),
        "frames": int(info.frames),
        "subtype": info.subtype,
        "format": info.format,
        "duration": float(info.frames) / info.samplerate if info.frames else 0.0
    }


def load_audio_mono(path):
    """
    Always load safely as mono using Librosa.
    This helper keeps the original logic untouched.
    """
    try:
        y, sr = librosa.load(path, sr=None, mono=True)
        if np.isnan(y).any():
            y = np.nan_to_num(y)
        return y, sr
    except Exception as e:
        raise RuntimeError(f"Audio loading failed: {str(e)}")