add WAVE_byte_swap.py

src/WAVE_byte_swap.py

@@ -0,0 +1,39 @@
+#!/usr/bin/python3
+
+from os.path import basename
+from sys import argv
+import numpy as np
+import wave
+
+def main(argv: list) -> None:
+	show_help = (argc := len(argv)) != 3
+	show_help = show_help or (argc >= 2 and argv[1] in ["-h", "--help"])
+	if show_help:
+		print("Usage:", basename(argv[0]), "<input file name> "
+			"<output file name>")
+		return
+
+	input_wave = wave.open(argv[1], "rb")
+	nchannels, sampwidth, framerate, nframes = input_wave.getparams()[:4]
+
+	if sampwidth == 2:
+		np_type = np.int16
+	else:
+		print("Unsupported bit depth:", 8 * sampwidth)
+		return
+
+	audio_data = input_wave.readframes(nframes)
+
+	audio_array = np.frombuffer(audio_data, dtype=np_type).byteswap()
+
+	output_wave = wave.open(argv[2], "wb")
+	output_wave.setparams(
+		(nchannels, sampwidth, framerate, 0, "NONE", "not compressed"))
+	output_wave.writeframes(audio_array.tobytes())
+	output_wave.close()
+
+	print("Done")
+
+if __name__ == "__main__":
+	main(argv)
+