import sys
import random, struct
import wave

freq = 16000
BIAS = 32768
def convert(srcpath, destpath):
	outdata = bytearray()
	with wave.open(srcpath, mode="rb") as f:
		params = f.getparams()
		print(params.nchannels, params.sampwidth, params.framerate)

		frames = f.readframes(2*1024*1024)
		for i in range(0, len(frames), 2):
			v = int.from_bytes(frames[i:i+2], "little", signed=True)
			v += BIAS
			hi = (v & 0xFF00) >> 8
			lo = (v & 0x00FF)
			outdata.append(hi)
			outdata.append(lo)

	with open(destpath, mode="wb") as f:
		f.write(outdata)


if __name__ == "__main__":
	sourcefilename = sys.argv[1]
	destfilename = sys.argv[2]
	convert(sourcefilename, destfilename)