cube/FFT.py at master · PPRaspberryPi/cube · GitHub

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importthreading
importtime
importwave

importnumpy
importsimpleaudioassa
fromscipy.fftpackimportdct

importAnimations
importDirection
importGame
importUtilasutil
importapi


classAudioVis(Game.CubeGame, threading.Thread):
_name='Audio Visualizer'
_version='v0.1'

_menu_frame= [1, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0,
1, 1, 0, 0, 0, 0, 0, 0,
1, 1, 1, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1]

def__init__(self, cube_size, frame_size):
Game.CubeGame.__init__(self, cube_size, frame_size, self._name)
threading.Thread.__init__(self)
self.an=None

self.finished=False
self.file_name="music.wav"
self.status='stopped'
self.N=self.cube_size# num of bars
self.HEIGHT=self.cube_size# height of a bar
self.WIDTH=self.cube_size# width of a bar

# process wave data
self.f=wave.open(self.file_name, 'rb')
self.params=self.f.getparams()
self.nchannels, self.sampwidth, self.framerate, self.nframes=self.params[:4]
self.str_data=self.f.readframes(self.nframes)
self.f.close()

self.wave_data=numpy.frombuffer(self.str_data, dtype=numpy.short)
self.wave_data.shape=-1, 2
self.wave_data=self.wave_data.T

self.num=self.nframes

self.amplifier=12

self.fps=24

self.frames= []

defget_menu_frame(self):
returnself._menu_frame

defhas_menu_animation(self):
returnTrue

defstart_game(self):
pass

defplay_animation(self):
self.an=Animations.TickerAnimation("audiovis")
self.an.start()

defclose_animation(self):
self.an.stop()

defstopped_animation(self):
returnself.an.stopped()

defis_animation_alive(self):
returnself.an.is_alive()

defdone(self):
pass

defrun(self):
musicfile=sa.WaveObject.from_wave_file(self.file_name)
musicfile.play()
Direction.direction_p_1.value=0
whileDirection.direction_p_1.value!=7:
num=int(self.num)
h=abs(dct(self.wave_data[0][self.nframes-num:self.nframes-num+self.N]))
h= [min(self.HEIGHT, int(i** (1/2.5) *self.HEIGHT/100)) *self.amplifierforiinh]

self.frames= [h] +self.frames

"""
 i = 0
 for f in self.frames:
 if i < self.cube_size:
 api.change_face(api.Face.FRONT, i, util.construct_2D_audio_frame(self.cube_size, f))
 i += 1
 else:
 self.frames.remove(f)
 """

forxinrange(self.cube_size):
api.change_face(api.Face.FRONT, self.cube_size-1-x,
util.construct_2D_audio_frame(self.cube_size, h, x))

self.num-= (1/self.fps) *self.framerate

ifself.num<0:
self.finished=True

time.sleep(1/ (self.fps*2.2))

sa.stop_all()
self.finished=True
Direction.direction_p_1.value=0