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#! /usr/bin/python
import pygst
pygst.require("0.10")
import pygtk
import gtk
import cairo
import gobject
from time import *
from struct import *
import pango
import os
import audioop
from Numeric import *
from FFT import *
class Mouth(gtk.DrawingArea):
def __init__(self, audioSource):
gtk.DrawingArea.__init__(self)
self.connect("expose_event",self.expose)
self.buffers = []
self.str_buffer=''
self.integer_buffer=[]
audioSource.connect("new-buffer", self._new_buffer)
self.peaks = []
self.main_buffers = []
self.y_mag = 0.7
self.freq_range=70
self.draw_interval = 1
self.num_of_points = 105
self.details_show = False
self.logging_status=False
self.f=None
self.stop=False
self.fft_show = False
self.fftx = []
self.y_mag_bias_multiplier = 1 #constant to multiply with self.param2 while scaling values
self.scaleX = "10"
self.scaleY = "10"
def _new_buffer(self, obj, buf, status, f):
self.str_buffer = buf
self.integer_buffer = list(unpack( str(int(len(buf))/2)+'h' , buf))
if(len(self.main_buffers)>6301):
del self.main_buffers[0:(len(self.main_buffers)-6301)]
self.main_buffers += self.integer_buffer
self.logging_status=status
self.f=f
return True
def processBuffer(self, bounds):
self.param1 = bounds.height/65536.0
self.param2 = bounds.height/2.0
if(self.stop==False):
if(self.fft_show==False):
######################filtering####################
weights = [1,2,3,4,3,2,1]
weights_sum = 16.0
for i in range(3,len(self.integer_buffer)-3):
self.integer_buffer[i] = (self.integer_buffer[(i-3)]+2*self.integer_buffer[(i-2)] + 3*self.integer_buffer[(i-1)] + 4*self.integer_buffer[(i)]+3*self.integer_buffer[(i+1)] + 2*self.integer_buffer[(i+2)] + self.integer_buffer[(i+3)]) / weights_sum
###################################################
self.y_mag_bias_multiplier=1
self.draw_interval=10
#100hz
if(self.freq_range==30):
self.spacing = 60
self.num_of_points=6300
#1khz
if(self.freq_range==50):
self.spacing = 6
self.num_of_points=630
#4khz
if(self.freq_range==70):
self.spacing = 1
self.num_of_points = 105
self.scaleX = str(self.spacing*.104) + " msec" #.104 = 5/48; 5 points per division and 48 khz sampling
if(len(self.main_buffers)>=self.num_of_points):
del self.main_buffers[0:len(self.main_buffers)-(self.num_of_points+1)]
self.buffers=[]
i=0
while i<self.num_of_points:
self.buffers.append(self.main_buffers[i])
i+=self.spacing
self.scaleY=" "
else:
###############fft################
Fs = 48000
nfft= 65536
self.integer_buffer=self.integer_buffer[0:256]
self.fftx = fft(self.integer_buffer, 256,-1)
self.fftx=self.fftx[0:self.freq_range*2]
self.draw_interval=bounds.width/(self.freq_range*2)
NumUniquePts = ceil((nfft+1)/2)
self.buffers=abs(self.fftx)*0.02
self.y_mag_bias_multiplier=0.1
self.scaleX = "hz"
self.scaleY = ""
##################################
if(len(self.buffers)==0):
return False
###############Scaling the values################
val = []
for i in self.buffers:
temp_val_float = float(self.param1*i*self.y_mag) + self.y_mag_bias_multiplier * self.param2
if(temp_val_float >= bounds.height):
temp_val_float = bounds.height-25
if(temp_val_float <= 0):
temp_val_float = 25
val.append( temp_val_float )
self.peaks = val
#################################################
def expose(self, widget, event):
"""This function is the "expose" event handler and does all the drawing."""
bounds = self.get_allocation()
self.processBuffer(bounds)
#Create context, disable antialiasing
self.context = widget.window.cairo_create()
self.context.set_antialias(cairo.ANTIALIAS_NONE)
#set a clip region for the expose event. This reduces redrawing work (and time)
self.context.rectangle(event.area.x, event.area.y,event.area.width, event.area.height)
self.context.clip()
# background
self.context.set_source_rgb(.5,.5,.5)
self.context.rectangle(0,0, bounds.width,bounds.height)
self.context.fill()
# Draw the waveform
self.context.set_line_width(10.0)
count = 0
for peak in self.peaks:
self.context.line_to(count,bounds.height - peak)
count += self.draw_interval
self.context.set_source_rgb(0,0,0)
self.context.stroke()
return True
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