cleanup, add volume

src/arg_parse.rs

@@ -7,29 +7,32 @@ pub struct Args {
     pub config: Option<String>,
 
     #[clap(short, long, help = "play folder content")]
-    pub folder:  Option<String>,
+    pub folder: Option<String>,
 
     #[clap(short, long, help = "file path for logfile")]
-    pub log:  Option<String>,
+    pub log: Option<String>,
 
     #[clap(short = 'i', long, help = "loop playlist infinitely")]
     pub r#loop: bool,
 
     #[clap(short, long,
         help = "set output mode: desktop, hls, stream")]
-    pub output:  Option<String>,
+    pub output: Option<String>,
 
     #[clap(short, long, help = "path from playlist")]
-    pub playlist:  Option<String>,
+    pub playlist: Option<String>,
 
     #[clap(short, long, help = "start time in 'hh:mm:ss', 'now' for start with first")]
-    pub start:  Option<String>,
+    pub start: Option<String>,
 
     #[clap(short = 't', long, help = "set length in 'hh:mm:ss', 'none' for no length check")]
-    pub length:  Option<String>,
+    pub length: Option<String>,
 
     #[clap(long, help = "playing mode: folder, playlist, custom...")]
-    pub play_mode:  Option<String>,
+    pub play_mode: Option<String>,
+
+    #[clap(short, long, help = "set audio volume")]
+    pub volume: Option<String>,
 }
 
 pub fn get_args() -> Args {