diff options
Diffstat (limited to 'fft_mouth.py')
| -rw-r--r-- | fft_mouth.py | 71 |
1 files changed, 31 insertions, 40 deletions
diff --git a/fft_mouth.py b/fft_mouth.py index 8200ef6..53bcadf 100644 --- a/fft_mouth.py +++ b/fft_mouth.py @@ -7,17 +7,17 @@ # # 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/>. @@ -33,69 +33,66 @@ except: from Numeric import ceil from FFT import * - 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.freq_range=70 self.draw_interval = 1 self.num_of_points = 105 - self.stop = False + self.stop=False - #constant to multiply with self.param2 while scaling values - self.y_mag_bias_multiplier = 1 + self.y_mag_bias_multiplier = 1 #constant to multiply with self.param2 while scaling values self.fftx = [] self.scaleX = "10" self.scaleY = "10" + def processBuffer(self, bounds): - self.param1 = bounds.height / 65536.0 - self.param2 = bounds.height / 2.0 + self.param1 = bounds.height/65536.0 + self.param2 = bounds.height/2.0 - if(self.stop == False): + if(self.stop==False): Fs = 48000 - nfft = 65536 - self.newest_buffer = self.newest_buffer[0:256] - self.fftx = fft(self.newest_buffer, 256, -1) + 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 = bounds.width / (self.freq_range * 2.) + 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 + 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): + 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 + 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 + temp_val_float = bounds.height-25 if(temp_val_float <= 0): temp_val_float = 25 - val.append(temp_val_float) + 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.""" + """This function is the "expose" event handler and does all the drawing.""" bounds = self.get_allocation() @@ -105,32 +102,26 @@ class FFTMouth(Mouth): 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) + #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_rgba(*self.fill_color.get_rgba()) - self.context.rectangle(0, 0, bounds.width, bounds.height) + self.context.rectangle(0,0, bounds.width,bounds.height) self.context.fill() # Draw the waveform - self.context.set_line_width(min(bounds.height / 10.0, 10)) - self.context.set_source_rgb(0, 0, 0) + self.context.set_line_width(min(bounds.height/10.0, 10)) + self.context.set_source_rgb(0,0,0) count = 0 for peak in self.peaks: - self.context.line_to(bounds.width / 2 + count, - bounds.height / 2 - peak) + self.context.line_to(bounds.width/2 + count,bounds.height/2 - peak) count += self.draw_interval self.context.stroke() count = 0 for peak in self.peaks: - self.context.line_to(bounds.width / 2 - count, - bounds.height / 2 - peak) + self.context.line_to(bounds.width/2 - count,bounds.height/2 - peak) count += self.draw_interval self.context.stroke() |