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fourlights.py
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# Fourier based light clavier.
import numpy as np
from time import time
import sys
WINDOW = 2*8192 # Recommended values: 1024, 2048 and 4096
SLIDE = 1024*2 # Recommended values: 128, 256, 512, 1024
SAMPLERATE = 44100
FFFT = False
GUI = True
OPENGL = False
SPECTRE = True
SPECTRE_SHADER = True
DMX = False
ECHO = False
LEWD = False
# Only relevant when using LEWD for LED visualisation
LEWDWALL_IP='10.0.20.16'
LEWDWALL_PORT=8000
if GUI:
if OPENGL:
from fourbargl import FourBarGL
from fourspectrogl import FourSpectroGL
else:
from four2d import Four2D
if DMX:
from fourdmx import FourDMX
if ECHO:
from fouraudio import FourAudio
if LEWD:
from fourlewds import FourLewds
def freq_to_fourier(fl, hz):
return int(fl.window * hz / fl.samplerate)
class FourLight(object):
def __init__(self, freqs):
self.freqs = freqs
def blinkenlights(self, freq):
pass
def odd_even_decomp(arr):
odd = (arr - arr[::-1]) / 2.0
even = arr - odd #lolwut
#even = odd - arr
return odd, even
class FourLights(object):
def __init__(self, inp, lights):
self.window = WINDOW
self.slide = SLIDE
self.samplerate = SAMPLERATE
self.inp = inp
self.lights = lights
self.freq = np.linspace(0.2, 0.8, self.window)
self.freql = self.freq
self.freqr = self.freq
self.ring = np.zeros(self.window * 2, dtype=np.int16)
self.wave = np.zeros(self.window * 2, dtype=np.int16)
self.wavec = np.zeros(self.window, dtype=np.int16)
self.wavel = self.wave[::2]
self.waver = self.wave[1::2]
# Ring buffer position
self.sample = 0
self.fcs = []
self.ffft = FFFT
def next(self):
if self.ffft:
x = self._next_single_fft()
else:
x = self._next_dual_fft()
return x
def _next_dual_fft(self):
w = (np.arange(0, 2 * (self.window / 2)) - (self.window / 2)) * (
1.0/ (self.window/ 2))
www = (1. - w ** 2)
ifr_l = np.fft.fft(self.wavel * www)
ifr_r = np.fft.fft(self.waver * www)
self.freql = np.abs(ifr_l / ((self.window / 2) * (32768 / (self.window >> 2))))
self.freqr = np.abs(ifr_r / ((self.window / 2) * (32768 / (self.window >> 2))))
# TODO: remove alias.
self.freq = self.freql
self.ring[self.sample:self.sample + self.slide] \
= np.frombuffer(self.inp.read(self.slide * 2), dtype=np.int16)
self.sample += self.slide
self.sample %= self.window
self.wave[:self.window * 2 - self.sample] = self.ring[self.sample:]
self.wave[self.window * 2 - self.sample:] = self.ring[:self.sample]
self.wavel = self.wave[::2]
self.waver = self.wave[1::2]
for _ in self.fcs:
_(self)
def _next_single_fft(self):
w = (np.arange(0, 2 * (self.window / 2)) - (self.window / 2)) * (
1.0/ (self.window / 2))
www = (1. - w ** 2)
ifr = np.fft.fft(self.wavec * www)
#f(-x) = -f(x)
freqc_odd = (ifr - ifr[::-1]) / 2.0
#f(x) = f(-x)
ifr -= freqc_odd
ifr_l = ifr
e_imag = ifr.imag
ifr_l.imag = freqc_odd.imag
ifr_r = freqc_odd
ifr_r.imag = e_imag
#ifr_l = np.sqrt(freqc_even.real ** 2 + freqc_odd.imag ** 2)
#ifr_r = np.sqrt(freqc_odd.real ** 2 + freqc_even.imag ** 2)
#self.freql = np.abs(ifr_l / ((self.window / 2) * (32768 / (self.window >> 2))))
self.freql = np.abs(ifr_l) / ((self.window / 2) * (32768 / (self.window >> 2)))
self.freqr = np.abs(ifr_r) / ((self.window / 2) * (32768 / (self.window >> 2)))
# TODO: remove alias.
self.freq = self.freql
self.ring[self.sample:self.sample + self.slide] \
= np.frombuffer(self.inp.read(self.slide * 2), dtype=np.int16)
self.sample += self.slide
self.sample %= self.window
self.wave[:self.window * 2 - self.sample] = self.ring[self.sample:]
self.wave[self.window * 2 - self.sample:] = self.ring[:self.sample]
self.wavec = www * self.wave[::2] + 1.0j * (self.wave[1::2] * www)
for _ in self.fcs:
_(self)
return
if __name__ == '__main__':
lampjes = []
for i in xrange(3):
lampjes.append(FourLight([SAMPLERATE / WINDOW * (j + (i * 3))
for j in xrange(3)]))
for tone in [0, 2, 3, 5, 7, 8, 10]:
lampjes.append(FourLight([(220.0 * (2.0 ** (octa + (tone/12.0))))
for octa in xrange(3)]))
fl = FourLights(sys.stdin, lampjes)
if DMX:
dmx = FourDMX()
dmx.open()
def _write_led(fourlights):
avg = np.sum(fourlights.freq) / fourlights.window * 2
wr = [fourlights.freq[4 * (i + 1)] * 45 for i in xrange(9)]
freq = np.array(fourlights.freq)
freq[freq < avg] = 0
freq[freq >= avg] -= avg
wr += [freq[freq_to_fourier(fl, 220.0 * (2.0 **
(oct + (tone/7.0))))] * 45 for tone in xrange(7)
for oct in xrange(3)][:21]
dmx.write(wr)
def write_led(fourlights):
#avg = np.sum(fourlights.freq) / fourlights.window * 2
#wr = [fourlights.freq[4 * (i + 1)] * 45 for i in xrange(9)]
#freq = np.array(fourlights.freq)
#freq[freq < avg] = 0
#freq[freq >= avg] -= avg
#wr += [freq[freq_to_fourier(fl, 220.0 * (2.0 **
# (oct + (tone/7.0))))] * 45 for tone in xrange(7)
# for oct in xrange(3)][:21]
wr = [fourlights.freq[freq_to_fourier(fl, freq)] * 45
for light in fl.lights
for freq in light.freqs]
dmx.write(wr)
fl.fcs.append(write_led)
if ECHO:
au = FourAudio()
def write_wav(fourlights):
w = fourlights.wave.tostring()
au.write(w)
fl.fcs.append(write_wav)
if LEWD:
lewd = FourLewds()
def write_lewd(fourlights):
lewd.write(fourlights.freq)
fl.fcs.append(write_lewd)
if not GUI:
while True:
fl.next()
exit(0)
if OPENGL:
if SPECTRE:
fgl = FourSpectroGL(fl, shader=SPECTRE_SHADER)
else:
fgl = FourBarGL(fl)
else:
fgl = Four2D(fl)
fgl.run()