I currently have a program to collect sound signal from a mic and display the wave form at real-time on python. For matplotlib funcanimation, I was trying this way to add some pause and start buttons or function to my program. But it did not work.
def onClick(event):
global pause
pause ^= True
fig.canvas.mpl_connect('button_press_event', onClick)
I am wondering where to combine these codes to my program. Is there any programming method could solve this problem?
Here is the code:
import pyaudio
import tkinter as tk
import wave
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
CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output.wav"
data =[]
Recording=False
FFT_LEN = 128
frames=[]
counter=1
#GUI
class Application(tk.Frame):
def __init__(self,master=None):
tk.Frame.__init__(self,master)
self.grid()
self.creatWidgets()
def creatWidgets(self):
self.quitButton=tk.Button(self,text='quit',command=root.destroy)
self.quitButton.grid(column=1,row=3)
#Matplotlib
fig = plt.figure()
rt_ax = plt.subplot(212,xlim=(0,CHUNK), ylim=(-10000,10000))
fft_ax = plt.subplot(211)
fft_ax.set_yscale('log')
fft_ax.set_xlim(0,CHUNK/2 + 1)
fft_ax.set_ylim(1,100000000)
rt_ax.set_title("Real Time")
fft_ax.set_title("FFT Time")
rt_line = line.Line2D([],[])
fft_line = line.Line2D([],[])
rt_data=np.arange(0,CHUNK,1)
fft_data=np.arange(0,CHUNK/2 + 1,1)
rt_x_data=np.arange(0,CHUNK,1)
fft_x_data=np.arange(0,CHUNK/2 + 1,1)
def plot_init():
rt_ax.add_line(rt_line)
fft_ax.add_line(fft_line)
return fft_line,rt_line,
def plot_update(i):
global rt_data
global fft_data
rt_line.set_xdata(rt_x_data)
rt_line.set_ydata(rt_data)
fft_line.set_xdata(fft_x_data)
fft_line.set_ydata(fft_data)
return fft_line,rt_line,
ani = animation.FuncAnimation(fig, plot_update,
init_func=plot_init,
frames=1,
interval=30,
blit=True)
# pyaudio
p = pyaudio.PyAudio()
q = queue.Queue()
def audio_callback(in_data, frame_count, time_info, status):
global ad_rdy_ev
q.put(in_data)
ad_rdy_ev.set()
if counter <= 0:
return (None,pyaudio.paComplete)
else:
return (None,pyaudio.paContinue)
stream = p.open(format=FORMAT,
channels=CHANNELS,
rate=RATE,
input=True,
output=False,
frames_per_buffer=CHUNK,
stream_callback=audio_callback)
if Recording:
wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
print("Start Recording")
stream.start_stream()
#processing block
window = signal.hamming(CHUNK)
def read_audio_thead(q,stream,frames,ad_rdy_ev):
global rt_data
global fft_data
while stream.is_active():
ad_rdy_ev.wait(timeout=1000)
if not q.empty():
#process audio data here
data=q.get()
while not q.empty():
q.get()
rt_data = np.frombuffer(data,np.dtype('<i2'))
rt_data = rt_data * window
fft_temp_data=fftpack.fft(rt_data,rt_data.size,overwrite_x=True)
fft_data=np.abs(fft_temp_data)[0:fft_temp_data.size/2+1]
if Recording :
frames.append(data)
ad_rdy_ev.clear()
ad_rdy_ev=threading.Event()
t=threading.Thread(target=read_audio_thead,args=(q,stream,frames,ad_rdy_ev))
t.daemon=True
t.start()
plt.show()
root=tk.Tk()
app=Application(master=root)
app.master.title("Test")
app.mainloop()
stream.stop_stream()
stream.close()
p.terminate()
print("* done recording")
if Recording:
wf.writeframes(b''.join(frames))
wf.close()
