test.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, print_function 
import numpy as np
import wave  
import math
from ctypes import *


ll = cdll.LoadLibrary   
lib = ll("./build/lib.linux-x86_64-2.7/_simple_ns.so")  

chunk = 160 
filename = 'test_case1.wav'

dataout = np.zeros((160))  
dataout = dataout.astype(np.int16)


f = wave.open(filename,"rb") 
pms = f.getparams()
nchannels, sampwidth, framerate, nframes = pms[:4]

cycle = int(math.ceil(nframes/chunk))

dataoutall = np.zeros(cycle*160)  

dataoutall = dataoutall.astype(np.int16)

lib.webrtc_nsx_create.restype=c_void_p
a = lib.webrtc_nsx_create(2)

for j in range(cycle):
    data = f.readframes(chunk)  
    data = np.fromstring(data, np.int16)

    b_arr = (c_short*160)(*dataout)
    a_arr = (c_short*160)(*data)

    lib.webrtc_nsx_process(a, a_arr, b_arr)
    
    for i in range(160):
        dataoutall[i + j*160] = b_arr[i]

dataoutall = dataoutall.tostring()
wave_out=wave.open("out.wav",'w')
wave_out.setnchannels(1)
wave_out.setsampwidth(2)
wave_out.setframerate(16000)
wave_out.writeframes(dataoutall)

print("DONE!")