6211 Тонников Платон Валерьевич Лаб.3 Вар.21

audio_processing.py

@@ -0,0 +1,22 @@
+"""Module for audio processing operations."""
+
+from typing import Tuple
+
+import numpy as np
+import soundfile as sf
+
+
+def read_audio(path: str) -> Tuple[np.ndarray, int]:
+    """Read audio file and return data with samplerate."""
+    data, samplerate = sf.read(path)
+    return data, samplerate
+
+
+def write_audio(path: str, data: np.ndarray, samplerate: int) -> None:
+    """Write audio data to file."""
+    sf.write(path, data, samplerate)
+
+
+def reverse_audio(data: np.ndarray) -> np.ndarray:
+    """Return reversed audio signal."""
+    return data[::-1]

main.py

@@ -0,0 +1,46 @@
+"""Main module for Lab 3 Variant 21."""
+
+import argparse
+import os
+
+from audio_processing import read_audio, reverse_audio, write_audio
+from visualization import plot_audio
+
+
+def main() -> None:
+    """CLI entry point."""
+    parser = argparse.ArgumentParser(description="Lab 3 Variant 21")
+    parser.add_argument("--input_path", required=True, type=str)
+    parser.add_argument("--output_path", required=True, type=str)
+
+    args = parser.parse_args()
+
+    if not os.path.exists(args.input_path):
+        print("Файл не найден.")
+        return
+
+    try:
+        data, samplerate = read_audio(args.input_path)
+    except Exception:
+        print("Ошибка чтения аудиофайла.")
+        return
+
+    print("Размер массива:", data.shape)
+    print("Частота дискретизации:", samplerate)
+    print("Длительность (сек):", len(data) / samplerate)
+
+    reversed_data = reverse_audio(data)
+
+    plot_audio(data, reversed_data, samplerate)
+
+    try:
+        write_audio(args.output_path, reversed_data, samplerate)
+    except Exception:
+        print("Ошибка записи файла.")
+        return
+
+    print("Файл сохранён:", args.output_path)
+
+
+if __name__ == "__main__":
+    main()

visualization.py

@@ -0,0 +1,35 @@
+"""Module for audio visualization."""
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+
+def plot_audio(
+    original: np.ndarray,
+    reversed_audio: np.ndarray,
+    samplerate: int
+) -> None:
+    """Plot original and reversed audio signals."""
+    time_original = np.linspace(
+        0, len(original) / samplerate, num=len(original)
+    )
+    time_reversed = np.linspace(
+        0, len(reversed_audio) / samplerate, num=len(reversed_audio)
+    )
+
+    plt.figure(figsize=(12, 6))
+
+    plt.subplot(2, 1, 1)
+    plt.plot(time_original, original)
+    plt.title("Original Audio")
+    plt.xlabel("Time (seconds)")
+    plt.ylabel("Amplitude")
+
+    plt.subplot(2, 1, 2)
+    plt.plot(time_reversed, reversed_audio)
+    plt.title("Reversed Audio")
+    plt.xlabel("Time (seconds)")
+    plt.ylabel("Amplitude")
+
+    plt.tight_layout()
+    plt.show()