def callback(msg):
global record
global data
global count
data = append(data, msg.data)
#print len(msg.data)
count += 1
if count == N_CYCLES:
signal_1 = data[::2]
signal_2 = data[1::2]
#signal_1 = [struct.unpack('B', struct.pack('b',d))[0] for d in data[::2]]
#signal_2 = [struct.unpack('B', struct.pack('b',d))[0] for d in data[1::2]]
print len(signal_1)
print signal_1
print "number of samples(frames): " + str(len(signal_1))
print "SAMPLING RATE: " + str(RATE) + "(Hz)"
print "DURATION: " + str(DURATION) + "(s)"
helper.plot_from_rawdata(signal_1, signal_2, RATE)
rospy.signal_shutdown("Recording finished")
def callback(msg):
global record
global data
global count
data = append(data, msg.data)
# print len(msg.data)
count += 1
if count == N_CYCLES:
signal_1 = data[::2]
signal_2 = data[1::2]
# signal_1 = [struct.unpack('B', struct.pack('b',d))[0] for d in data[::2]]
# signal_2 = [struct.unpack('B', struct.pack('b',d))[0] for d in data[1::2]]
print len(signal_1)
print signal_1
print "number of samples(frames): " + str(len(signal_1))
print "SAMPLING RATE: " + str(RATE) + "(Hz)"
print "DURATION: " + str(DURATION) + "(s)"
helper.plot_from_rawdata(signal_1, signal_2, RATE)
rospy.signal_shutdown("Recording finished")
####################################################
######## Getting Sound Data through PyAudio ########
####################################################
n_reads = int(RATE * RECORD_SECONDS / CHUNK)
print 'n_reads=', n_reads
data = ''.join([stream.read(CHUNK) for i in range(n_reads)])
print 'len(data)=', len(data)
if FORMAT == pyaudio.paInt16:
signal = struct.unpack("<%uh" % (len(data) / 2), data)
elif FORMAT == pyaudio.paInt24:
signal = [struct.unpack('<i', data[i:i+3] +
('\0' if data[i+2] < '\x80' else '\xff'))[0]
for i in range(0, len(data), 3)]
elif FORMAT == pyaudio.paInt32:
signal = struct.unpack("<%ul" % (len(data) / 4), data)
else:
raise TypeError("Not supported PyAudio format")
if args.save_file:
pickle.dump(signal, args.save_file)
print("* done recording")
stream.stop_stream()
stream.close()
p.terminate()
N = args.N if args.N else 2048
Ns = args.Ns if args.Ns else 1024
overlap_ratio = args.overlap_ratio if args.overlap_ratio else 0.7
signal = signal[:N]
helper.plot_from_rawdata(signal[0::2], signal[1::2], RATE, Ns, overlap_ratio)