Allow frame delays to be overridden

nyan/nyancat.py

@@ -36,10 +36,13 @@ class Nyancat(object):
     def __init__(self, width, height):
         self.width = width
         self.height = height
+        self.frame_index = 0
         self.sparkles = []
 
     def render(self):
-        for anim_frame in anim_cat:
+        self.frame_index = (self.frame_index + 1) % len(anim_cat)
+        anim_frame = anim_cat[self.frame_index]
+
         if len(self.sparkles) < 32:
             self.sparkles.append(Sparkle(self.width, self.height))
 
@@ -82,6 +85,9 @@ class Nyancat(object):
         self.sparkles = list(filter(lambda sp: sp.frame_index < len(anim_sparkle), self.sparkles))
 
         sys.stdout.buffer.write(frame)
+        self.sleep()
+
+    def sleep(self):
         time.sleep(1 / 30)
 
     def plot_tail(self, width):

nyan/pcm.py

@@ -31,3 +31,6 @@ class NyancatSignal(Nyancat):
         for x in range(width):
             amplitude = sum(map(lambda hist: hist[x * WAVE_FACTOR], self.samples_history)) / len(self.samples_history) * 3
             yield int((amplitude * .5 - .5) * self.height) + self.height
+
+    def sleep(self):
+        pass # Handled by a blocking read from the audio source