| """ |
| =============================================================================== |
| preprocessing/resampling.py — Audio Loading and Resampling |
| =============================================================================== |
| |
| """ |
| import librosa |
| import numpy as np |
| import warnings |
|
|
| |
| |
| from config import TARGET_SR |
|
|
| def resample_audio(file_path): |
| """ |
| Load a WAV file and resample it to the target sampling rate. |
| |
| Parameters |
| ---------- |
| file_path : str |
| Path to the .wav audio file. |
| |
| Returns |
| ------- |
| audio : np.ndarray |
| 1D numpy array of audio samples, resampled to TARGET_SR. |
| sr : int |
| The target sampling rate (always TARGET_SR). |
| |
| Notes |
| ----- |
| - librosa.load() with sr=TARGET_SR automatically resamples on load. |
| - mono=True ensures we get a 1D array (no stereo channels). |
| - If the file is already at TARGET_SR, no resampling is performed (fast path). |
| """ |
| try: |
| |
| |
| audio, sr = librosa.load( |
| file_path, |
| sr=TARGET_SR, |
| mono=True, |
| res_type="kaiser_best" |
| ) |
| |
| |
| if audio.size == 0: |
| warnings.warn(f"Warning: Loaded audio from {file_path} is completely empty.") |
| |
| return audio, sr |
|
|
| except Exception as e: |
| raise RuntimeError(f"Failed to load or resample audio file at {file_path}. Error: {e}") |
