new feature: support for stereo visualization

doc/config

@@ -23,17 +23,24 @@
 ##
 ## 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)
+## has to be set to 44100:16:1 for mono visualization
+## or 44100:16:2 for stereo visualization. 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"
+##        format          "44100:16:2"
 ## }
 ##
 #
+##
+## If you set format to 44100:16:2, make it 'yes'.
+##
+#
+#visualizer_in_stereo = "no"
+#
 #visualizer_fifo_path = ""
 #
 ##

doc/ncmpcpp.1

@@ -75,8 +75,11 @@ Default number of seconds to crossfade, if enabled by ncmpcpp.
 .B mpd_communication_mode = MODE
 If set to 'polling', ncmpcpp will constantly poll mpd for its status. If set to 'notifications', ncmppcp will make use of 'idle' command and wait for events. This is more efficient and responsive, but may cause some trouble with <mpd-0.15, so if you run such version and encounter strange bugs (e.g. current track time not being updated), you will either have to use 'polling' or upgrade your mpd.
 .TP
+.B visualizer_in_stereo = yes/no
+Should be set to 'yes', if fifo output's format was set to 44100:16:2.
+.TP
 .B visualizer_fifo_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)
+Path to mpd fifo output. This is needed to make music visualizer work (note that output sound format of this fifo has to be either 44100:16:1 or 44100:16:2, depending on whether you want mono or stereo visualization)
 .TP
 .B visualizer_output_name = NAME
 Name of output that provides data for visualizer. Needed to keep sound and visualization in sync.