CC-3483: Live Stream: default fade in/out for live stream transition

- done. changing fade value doesn't require LS to restart

python_apps/pypo/liquidsoap_scripts/ls_lib.liq

@@ -15,15 +15,12 @@ def append_title(m) =
   end
 end
 
-default_dj_fade_in = ref 5.
-default_dj_fade_out = ref 5.
-
 def transition(a,b) =
   log("transition called...")
   add(normalize=false,
      [ sequence([ blank(duration=2.),
-                   fade.initial(duration=!default_dj_fade_in, b) ]),
-        fade.final(duration=!default_dj_fade_out, a) ])
+                   fade.initial(duration=!default_dj_fade, b) ]),
+        fade.final(duration=!default_dj_fade, a) ])
 end
 
 def crossfade(s)

python_apps/pypo/liquidsoap_scripts/ls_script.liq

@@ -14,6 +14,7 @@ queue = cue_cut(queue)
 pypo_data = ref '0'
 web_stream_enabled = ref false
 stream_metadata_type = ref 0
+default_dj_fade = ref 0.
 station_name = ref ''
 show_name = ref ''
 
@@ -37,6 +38,7 @@ server.register(namespace="vars", "show_name", fun (s) -> begin show_name := s s
 server.register(namespace="vars", "station_name", fun (s) -> begin station_name := s s end)
 server.register(namespace="vars", "bootup_time", fun (s) -> begin time := s s end)
 server.register(namespace="streams", "connection_status", fun (s) -> begin "1:#{!s1_connected},2:#{!s2_connected},3:#{!s3_connected}" end)
+server.register(namespace="vars", "default_dj_fade", fun (s) -> begin default_dj_fade := float_of_string(s) s end)
 
 
 default = amplify(id="silence_src", 0.00001, noise())