add resample module in preprocessing package, refactor demucs_wrapper.py

src/preprocessing/resample.py

@@ -0,0 +1,18 @@
+import librosa
+
+def resample(waveform, org_samplerate, new_samplerate):
+    """
+    Reads a waveform and returns a waveform resampled to samplerate.
+
+    Args:
+        waveform: waveform of the target audio.
+        org_samplerate : original samplerate of the audio.
+        new_samplerate : samplerate to which the audio is to be resampled.
+    """
+
+    try:
+        waveform = librosa.resample(waveform, orig_sr=org_samplerate, target_sr=new_samplerate)
+        return waveform, new_samplerate
+    except Exception as e: 
+        raise RuntimeError(f"Error reasmpling the audio file: {e}")
+    

src/separation/demucs_wrapper.py

@@ -1,66 +1,35 @@
 import subprocess
 import os
-import librosa
 import soundfile as sf
 import tempfile
+from pathlib import Path
 
-def preprocess_audio(input_file: str, target_sr: int = 41000):
-    """
-    Preprocess the audio file by loading, converting to mono, and resampling.
-
-    Parameters:
-        input_file (str): Path to the input audio file to be processed.
-        target_sr (int): The target sample rate for the resampled audio.
-
-    Returns:
-        str: Path to the temporary processed audio file.
-    """
-    # Load the audio with librosa, converting to mono and resampling
-    waveform, sr = librosa.load(input_file, sr=target_sr, mono=True)
-    
-    # Create a temporary file to save the processed audio
-    temp_audio_path = tempfile.mktemp(suffix=".wav")
-    
-    # Save the processed audio to the temporary file
-    sf.write(temp_audio_path, waveform, target_sr)
-    
-    return temp_audio_path
-
-def separate_audio_with_demucs(input_file: str, output_dir: str = './separated_output'):
+def separate_audio_with_demucs(input_file, sample_rate, output_dir: str):
     """
     Use subprocess to run Demucs separation on an input audio file.
-
     Parameters:
         input_file (str): Path to the input audio file to be separated.
         output_dir (str): Directory where the separated output will be saved.
     """
+
+
     # Create the output directory if it does not exist
     os.makedirs(output_dir, exist_ok=True)
 
-    # Preprocess the audio file
-    processed_audio = preprocess_audio(input_file)
+    # Demucs command to separate the temp audio file
+    command = [ 'demucs', '--out', output_dir, input_file]
 
-    # Demucs command to separate the audio file
-    command = [
-        'demucs',
-        '--out', output_dir,  # Output directory for separated tracks
-        processed_audio       # Input processed file
-    ]
-    
     try:
         # Run the command as a subprocess
         subprocess.run(command, check=True)
         print(f"Separation completed. Output saved to {output_dir}")
     except subprocess.CalledProcessError as e:
-        print(f"An error occurred while running Demucs: {e}")
+        print(f"An error occured while running demucs : {e}")
     except FileNotFoundError:
-        print("Demucs is not installed or not found in the system PATH.")
+        print("Demucs is not installed or not found in the system PATH")
     finally:
-        # Clean up the temporary file
-        os.remove(processed_audio)
+        # Cleanup the temporary file
+        os.remove(input_file)
 
-if __name__ == "__main__":
-    # Example usage
-    input_audio_path = 'samples/pancakes_for_dinner.wav'  # Path to your audio file
-    output_folder = './separated_output'  # Where the separated files will be stored
-    separate_audio_with_demucs(input_audio_path, output_folder)
+
+