Add volume support

Author: gatomod

.vscode/settings.json

@@ -10,5 +10,6 @@
         "**/.project": true,
         "**/.settings": true,
         "**/.factorypath": true
-    }
+    },
+    "hide-files.files": []
 }

README.md

@@ -1,5 +1,3 @@
 # FFtools
-
-# wtf fix this readme xd
-
 🔨 FFmpeg-based toolkit for manipulate multimedia easily
+

src/logs.rs

@@ -8,9 +8,10 @@ const HELP: &str = "Use `--help` for more information.";
 pub fn help() {
     printdoc! {
         "{title}
-		FFmpeg-based toolkit for manipulate multimedia easily.
+		FFmpeg-based toolkit for manipulate multimedia easily
 		
-		Licensed under the Apache License, Version 2.0.
+		Copyright 2023 Gátomo
+        Licensed under the Apache License, Version 2.0
 		< https://www.apache.org/licenses/LICENSE-2.0 >
 
 		{usage}
@@ -20,6 +21,7 @@ pub fn help() {
 			trim	Trims video between a range [ at least `--from` or `--to` ]
 			gif	Converts video into lossless GIF [ no options ]
 			scale	Scale a file by percentage [ `--scale` ]
+			volume  Set audio volume [ `--volume` ]
 			free	Dynamic subcommand [ any option ]
 
 
@@ -29,10 +31,11 @@ pub fn help() {
 			-w, --overwrite		Overwrite output
 		
 		Media manipulation:
-			-f, --from <time>	Start timestamp
-			-t, --to <time>		End timestamp
+			-f, --from <time>		Start timestamp
+			-t, --to <time>			End timestamp
 			-s, --scale <percentage>	Scale percentage
-			    --fps		Set framerate
+			    --fps <fps>			Set framerate
+			-vv, --volume <level>		Set volume (dB or percentage)
 
 		Miscellaneous:
 			-V, --verbose	Add verbosity

src/main.rs

@@ -80,6 +80,13 @@ fn main() {
                 exit(1);
             }
         }
+        "volume" => {
+            if args.volume.is_none() {
+                logs::ferror("volume".into(), vec!["--volume"], None);
+                exit(1);
+            }
+        }
+
         _ => {
             logs::error(format!("Unknown `{}` command.", args.command), None);
             exit(1)
@@ -118,14 +125,25 @@ fn main() {
                 exit(1);
             }) / 100.0
         );
-        vf_args.push(&scale_str)
+        vf_args.push(&scale_str);
     }
 
     // Volume
-    // TODO add dB and percentage support (100 as 1, https://trac.ffmpeg.org/wiki/AudioVolume)
     let vol_str: String;
     if let Some(volume) = args.volume.as_ref() {
-        vol_str = format!("volume={}", volume);
+        vol_str = format!(
+            "volume={}",
+            if volume.ends_with("dB") {
+                volume.to_string()
+            } else {
+                (volume.parse::<f64>().unwrap_or_else(|_| {
+                    logs::error("Please insert a valid number.".into(), None);
+                    exit(1);
+                }) / 100.0)
+                    .to_string()
+            }
+        );
+        af_args.push(&vol_str);
     }
 
     // Media filters
@@ -150,6 +168,7 @@ fn main() {
 
     // Check if file exists
     // This is checked after parsing args in case of output modification
+
     if args.output.exists() && !args.overwrite {
         logs::error(
             format!(

src/parser.rs

@@ -59,7 +59,7 @@ pub fn parser() -> Result<structs::Args, pico_args::Error> {
         scale: args.opt_value_from_str(["-s", "--scale"])?,
 
         // Volume
-        volume: args.opt_value_from_str(["--vol", "--volume"])?,
+        volume: args.opt_value_from_str(["-vv", "--volume"])?,
 
         // Output
         output: match args.free_from_os_str(parse_path) {