import threading

import queue

import matplotlib.pyplot as plt

import matplotlib.animation as animation

import matplotlib.lines as line

import numpy as np

from scipy import fftpack

from scipy import signal

from rtlsdr import *

import time

cos = np.cos

sin = np.sin

lg = np.log10

plot = plt.plot

fft = fftpack.fft

pi = np.pi

N = 4*1024

data = np.arange(0,N,1)

# plot the spectra

fig = plt.figure()

ax = plt.axes(xlim=(0,N),ylim=(-60,0))#

line, = ax.plot([], [], lw=2)

def init():

line.set_data([], [])

return line,

def animate(i):

return line,

anim = animation.FuncAnimation(fig, animate, frames=1, interval=100, blit=False)

Q = queue.Queue()

sdr = RtlSdr()

window = signal.hamming(N)

def data_processing():

data = 20*lg(ob_data/N)

t1 = threading.Thread(target = data_processing)

t2 = threading.Thread(target = rtlsdr_main)

t1.start()

t2.start()

plt.show()

sdr.cancel_read_async()

sdr.close()

print('ended')