# 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 . # This code is a stripped down version of the waveform view from Measure from mouth import * 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 def do_draw(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