new screen: music visualizer

doc/config

@@ -17,6 +17,23 @@
 #
 #mpd_crossfade_time = "5"
 #
+##### music visualizer #####
+##
+## Note: In order to make music visualizer work you'll
+## need to use mpd fifo output, whose format parameter
+## has to be set to 44100:16:1. Example configuration:
+## (it has to be put into mpd.conf)
+##
+## audio_output {
+##        type            "fifo"
+##        name            "My FIFO"
+##        path            "/tmp/mpd.fifo"
+##        format          "44100:16:1"
+## }
+##
+#
+#visualizer_fifo_path = ""
+#
 ##### system encoding #####
 ##
 ## if you use encoding other than utf8, set it in

doc/keys

@@ -58,6 +58,8 @@
 #
 #key_outputs = '8' 272
 #
+#key_music_visualizer = '9' 273
+#
 #key_clock = '0' 274
 #
 #key_stop = 's'

doc/ncmpcpp.1

@@ -66,6 +66,9 @@ Set connection timeout to MPD to given value.
 .B mpd_crossfade_time = SECONDS
 Default number of seconds to crossfade, if enabled by ncmpcpp.
 .TP
+.B fifo_visualizer_path = PATH
+Path to mpd fifo output. This is needed to make music visualizer work (note that output sound format of this fifo has to be 44100:16:1)
+.TP
 .B system_encoding = ENCODING
 If you use encoding other than utf8, set it in order to handle utf8 encoded strings properly.
 .TP