Created
January 28, 2013 06:59
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#! /usr/bin/env python | |
# -*- coding: utf-8 -*- | |
import pyaudio | |
import wave | |
import sys | |
import pylab | |
import numpy | |
import os | |
from subprocess import Popen, PIPE | |
from pylab import * | |
CHUNK = 1024 | |
FORMAT = pyaudio.paInt16 | |
CHANNELS = 1 | |
RATE = 44100 | |
READ_CNT = 4410 * 3 | |
E5 = 659 | |
A4 = 440 | |
D4 = 294 | |
E4 = 330 | |
G3 = 199 | |
freqs = [G3, D4, A4, E5, E4] | |
cmds = ["h", "j", "k", "l", "rr"] | |
MARGIN = 10 | |
hammingWindow = np.hamming(READ_CNT) | |
def getFreqIndex(hz): | |
for (i, f) in enumerate(freqs): | |
if f + MARGIN > hz and f - MARGIN < hz: | |
return i | |
return -1 | |
def sendKey(hz): | |
index = getFreqIndex(hz) | |
if index < 0: | |
return | |
AS = ''' | |
tell application "MacVim" | |
activate | |
tell application "System Events" | |
keystroke "%s" | |
end tell | |
end tell | |
''' % cmds[index] | |
osa = Popen('osascript', stdin = PIPE) | |
osa.stdin.write(AS) | |
osa.stdin.close() | |
os.waitpid(osa.pid, 0) | |
def getHz(data): | |
data = frombuffer(data, dtype="int16") | |
data = hammingWindow * data | |
dft = np.fft.fft(data) | |
freqList = np.fft.fftfreq(len(data), d = 1.0 / len(data)) | |
amp = [np.sqrt(c.real ** 2 + c.imag ** 2) for c in dft] | |
maxValue = 0 | |
hz = 0 | |
for (i, x) in enumerate(amp): | |
if x < maxValue or freqList[i] <= 0: | |
continue | |
maxValue = x | |
hz = freqList[i] | |
return int(hz * RATE / READ_CNT) | |
def loop(): | |
p = pyaudio.PyAudio() | |
stream = p.open( | |
format = FORMAT, | |
channels = CHANNELS, | |
rate = RATE, | |
frames_per_buffer = CHUNK, | |
input = True | |
) | |
for i in range(1000): | |
stream.start_stream() | |
data = stream.read(READ_CNT) | |
stream.stop_stream() | |
hz = getHz(data) | |
print hz | |
sendKey(hz) | |
stream.close() | |
p.terminate() | |
if __name__ == "__main__": | |
loop() | |
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