ESC exits program, if keyboard control is enabled

You can set keyboard control in config file. If enambed, you can
exit video looper by pressing ESC key any time (except countdown).

Adafruit_Video_Looper/video_looper.py

@@ -54,6 +54,7 @@ class VideoLooper(object):
         # Load other configuration values.
         self._osd = self._config.getboolean('video_looper', 'osd')
         self._is_random = self._config.getboolean('video_looper', 'is_random')
+        self._keyboard_control = self._config.getboolean('video_looper', 'keyboard_control')
         # Parse string of 3 comma separated values like "255, 255, 255" into 
         # list of ints for colors.
         self._bgcolor = map(int, self._config.get('video_looper', 'bgcolor') \
@@ -190,6 +191,11 @@ class VideoLooper(object):
         sw, sh = self._screen.get_size()
         self._screen.fill(self._bgcolor)
         self._screen.blit(label, (sw/2-lw/2, sh/2-lh/2))
+        # If keyboard control is enabled, display message about it
+        if self._keyboard_control:
+            label2 = self._render_text('press ESC to quit')
+            l2w, l2h = label2.get_size()
+            self._screen.blit(label2, (sw/2-l2w/2, sh/2-l2h/2+lh))
         pygame.display.update()
 
     def _prepare_to_run_playlist(self, playlist):
@@ -224,16 +230,27 @@ class VideoLooper(object):
                 # Rebuild playlist and show countdown again (if OSD enabled).
                 playlist = self._build_playlist()
                 self._prepare_to_run_playlist(playlist)
+            # Event handling for key press, if keyboard control is enabled
+            if self._keyboard_control:
+                for event in pygame.event.get():
+                    if event.type == pygame.KEYDOWN:
+                        # If pressed key is ESC quit program
+                        if event.key == pygame.K_ESCAPE:
+                            self.quit()
             # Give the CPU some time to do other tasks.
             time.sleep(0.002)
 
-    def signal_quit(self, signal, frame):
-        """Shut down the program, meant to by called by signal handler."""
+    def quit(self):
+        """Shut down the program"""
         self._running = False
         if self._player is not None:
             self._player.stop()
         pygame.quit()
 
+    def signal_quit(self, signal, frame):
+        """Shut down the program, meant to by called by signal handler."""
+        self.quit()
+
 
 # Main entry point.
 if __name__ == '__main__':

video_looper.ini

@@ -36,6 +36,11 @@ osd = true
 # To play random playlist.
 is_random = false
 
+# Control the program via keyboard
+# If enabled, hit ESC key to quit the program anytime (except countdown).
+keyboard_control = false
+#keyboard_control = true
+
 # Change the color of the background that is displayed behind movies (only works
 # with omxplayer).  Provide 3 numeric values from 0 to 255 separated by a commma
 # for the red, green, and blue color value.  Default is 0, 0, 0 or black.