import snd
import time
from datetime import date
import threading
from pydispatch import dispatcher
import wave
 
filename = "demo.wav"
 
def worker(filename):
    """thread worker function
    http://www.doughellmann.com/PyMOTW/threading/
 
    https://github.com/uskr/pynma
 
http://stackoverflow.com/questions/1092531/event-system-in-python """
    print 'Worker for '+filename
    
    return
 
def filenameMaker():
    global filename
    filename = date.today().isoformat()+'-'+str(time.time())+'-demo.wav'
 
def record_to_async_file():
    "Records from the microphone and outputs the resulting data to `path`"
    sample_width, data = snd.record()
    data = snd.pack('<' + ('h'*len(data)), *data)
    path = filename
    dispatcher.send( signal='FILE_CREATED', sender=filename, filename=filename)
    wf = wave.open(path, 'wb')
    wf.setnchannels(1)
    wf.setsampwidth(sample_width)
    wf.setframerate(snd.RATE)
    wf.writeframes(data)
    wf.close()
    print("done - result written to "+path)
 
dispatcher.connect( filenameMaker, signal='SND_STARTED', sender=dispatcher.Any )
dispatcher.connect( worker, signal='FILE_CREATED', sender=dispatcher.Any )
print "Scannr started..."
while True:
    print "ready to record"
    record_to_async_file()