Merge pull request #65 from radiorabe/feature/liquidsoap-workaround-cue_cut

Problem: liquidsoap sometimes clips audio

python_apps/pypo/liquidsoap/ls_script.liq

@@ -40,10 +40,32 @@ just_switched = ref false
 sources = ref []
 source_id = ref 0
 
+def check_version(~version=liquidsoap.version, major, minor) =
+    v = list.map(int_of_string, string.split(separator="\.", version))
+    list.nth(v,0) > major or list.nth(v,0) == major and list.nth(v,1) >= minor
+end
+
 def create_source()
     l = request.equeue(id="s#{!source_id}", length=0.5)
 
     l = audio_to_stereo(id="queue_src", l)
+
+    # cue cut fix for liquidsoap <1.2.2
+    #
+    # This was most likely broken on 1.1.1 (debian) as well.
+    # 
+    # adapted from https://github.com/savonet/liquidsoap/issues/390#issuecomment-277562081
+    #
+    if not check_version(1, 3) then
+        l = map_metadata(fun (~cue_in_metadata='liq_cue_in', m) ->
+            # 0.04 might need to be adjusted according to your frame size
+            if float_of_string(m[cue_in_metadata]) < 0.04 then
+                [(cue_in_metadata, "0")]
+            else
+                []
+            end
+        end)
+    end
     l = cue_cut(l)
     l = amplify(1., override="replay_gain", l)