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# Speak.activity
# A simple front end to the espeak text-to-speech engine on the XO laptop
# http://wiki.laptop.org/go/Speak
#
# Copyright (C) 2008 Joshua Minor
# This file is part of Speak.activity
#
# Parts of Speak.activity are based on code from Measure.activity
# Copyright (C) 2007 Arjun Sarwal - arjun@laptop.org
#
# Speak.activity is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Speak.activity is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Speak.activity. If not, see <http://www.gnu.org/licenses/>.
# This code is a super-stripped down version of the waveform view from Measure
from gi.repository import Gtk
from struct import unpack
import numpy.core
try:
from numpy.oldnumeric import ceil
from numpy.fft import *
except:
from Numeric import ceil
from FFT import *
class Mouth(Gtk.DrawingArea):
def __init__(self, audioSource, fill_color):
Gtk.DrawingArea.__init__(self)
self.buffers = []
self.buffer_size = 256
self.main_buffers = []
self.newest_buffer = []
self.fill_color = fill_color
self.show_all()
self.connect('draw', self.draw_mouth)
audioSource.connect("new-buffer", self._new_buffer)
def _new_buffer(self, obj, buf):
if len(buf) < 28:
self.newest_buffer = []
else:
self.newest_buffer = list(unpack(str(int(len(buf)) / 2) + 'h',
buf))
self.main_buffers += self.newest_buffer
if(len(self.main_buffers) > self.buffer_size):
del self.main_buffers[0:(len(self.main_buffers) - \
self.buffer_size)]
self.queue_draw()
return True
def processBuffer(self):
if len(self.main_buffers) == 0 or len(self.newest_buffer) == 0:
self.volume = 0
else:
self.volume = numpy.core.max(self.main_buffers) # -\
# numpy.core.min(self.main_buffers)
def draw_mouth(self, widget, context):
rect = widget.get_allocation()
self.processBuffer()
# background
context.set_source_rgba(*self.fill_color.get_rgba())
context.paint()
# Draw the mouth
volume = self.volume / 30000.
mouthH = volume * rect.height
mouthW = volume ** 2 * (rect.width / 2.) + rect.width / 2.
# T
# L R
# B
Lx, Ly = rect.width / 2 - mouthW / 2, rect.height / 2
Tx, Ty = rect.width / 2, rect.height / 2 - mouthH / 2
Rx, Ry = rect.width / 2 + mouthW / 2, rect.height / 2
Bx, By = rect.width / 2, rect.height / 2 + mouthH / 2
context.set_line_width(min(rect.height / 10.0, 10))
context.move_to(Lx, Ly)
context.curve_to(Tx, Ty, Tx, Ty, Rx, Ry)
context.curve_to(Bx, By, Bx, By, Lx, Ly)
context.set_source_rgb(0, 0, 0)
context.close_path()
context.stroke()
return True
class WaveformMouth(Mouth):
def __init__(self, audioSource, fill_color):
Mouth.__init__(self, audioSource, fill_color)
self.buffer_size = 100
self.peaks = []
self.stop = False
self.y_mag_bias_multiplier = 1
self.y_mag = 0.7
self.show_all()
def draw_wave(self, context):
rect = self.get_allocation()
self.param1 = rect.height / 65536.0
self.param2 = rect.height / 2.0
# background
context.set_source_rgba(*self.fill_color.get_rgba())
context.paint()
# Draw the waveform
context.set_line_width(min(rect.height / 10.0, 10))
count = 0
buflen = float(len(self.main_buffers))
for value in self.main_buffers:
peak = float(self.param1 * value * self.y_mag) +\
self.y_mag_bias_multiplier * self.param2
if peak >= rect.height:
peak = rect.height
if peak <= 0:
peak = 0
x = count / buflen * rect.width
context.line_to(x, rect.height - peak)
count += 1
context.set_source_rgb(0, 0, 0)
context.stroke()
return True
class FFTMouth(Mouth):
def __init__(self, audioSource, fill_color):
Mouth.__init__(self, audioSource, fill_color)
self.peaks = []
self.y_mag = 1.7
self.freq_range = 70
self.draw_interval = 1
self.num_of_points = 105
self.stop = False
#constant to multiply with self.param2 while scaling values
self.y_mag_bias_multiplier = 1
self.fftx = []
self.scaleX = "10"
self.scaleY = "10"
self.show_all()
self.connect('draw', self.draw_fftmouth)
def newprocessBuffer(self, rect):
self.param1 = rect.height / 65536.0
self.param2 = rect.height / 2.0
if(self.stop == False):
Fs = 48000
nfft = 65536
self.newest_buffer = self.newest_buffer[0:256]
self.fftx = fft(self.newest_buffer, 256, -1)
self.fftx = self.fftx[0:self.freq_range * 2]
self.draw_interval = rect.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 >= rect.height):
temp_val_float = rect.height - 25
if(temp_val_float <= 0):
temp_val_float = 25
val.append(temp_val_float)
self.peaks = val
def draw_fftmouth(self, widget, context):
rect = widget.get_allocation()
self.newprocessBuffer(rect)
# background
context.set_source_rgba(*self.fill_color.get_rgba())
context.paint()
# Draw the waveform
context.set_line_width(min(rect.height / 10.0, 10))
context.set_source_rgb(0, 0, 0)
count = 0
for peak in self.peaks:
context.line_to(rect.width / 2 + count,
rect.height / 2 - peak)
count += self.draw_interval
context.stroke()
count = 0
for peak in self.peaks:
context.line_to(rect.width / 2 - count,
rect.height / 2 - peak)
count += self.draw_interval
context.stroke()
return True
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