Merge pull request #1 from indiscipline/dev

v0.1.2:
feat: Support reading IEEE Float files
fix: Showing errors when processing multiple files
refactor: Separate config module
refactor: Abstracting sample copying logic to macros
refactor: Clippy warnings fix

Author: indiscipline

.gitignore

@@ -1,3 +1,4 @@
 target
 Thumbs.db
+reaper
 

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "zrtstr"
-version = "0.1.0"
+version = "0.1.2"
 authors = ["Kirill I. <elephanttalk@protonmail.com>"]
 
 exclude = [

Cargo.toml

@@ -33,9 +33,8 @@ and the executable will be in `target/release/zrtstr`.
 
 ## TODO
 Here are the current problems and planned features:
-- [ ] **Float support**: Add support for IEEE Float files
+- [ ] **Float support**: Add writing support for IEEE Float files (upstream-dependent)
 - [ ] **Add automatic tests**
-- [ ] **Refactor excessive copy-pasted nested blocks in code**
 
 ## Contributing ##
 This is an enthusiast project, so any help and/or critique will be much appreciated.
@@ -45,4 +44,4 @@ Feel free to file a bug report or feature request via [Issues](https://github.co
 ## License ##
 **zrtstr** licensed under GNU General Public License version 2 or later;
 
-See `LICENSE` file for full details.
+See `LICENSE` file for full details.

README.md

@@ -0,0 +1,100 @@
+extern crate clap;
+
+use clap::{Arg, App};
+use std::fs;
+use std::process;
+
+static LICENSE: &'static str = "zrtstr licensed under GNU General Public License version 2 or later;
+Full License available at <http://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.";
+
+pub struct Conf {
+    pub dither: u32,
+    pub dry_run: bool,
+    pub no_overwrites: bool,
+}
+
+pub fn get() -> (Option<String>, Conf) {
+    let matches = App::new("zrtstr")
+        .author(crate_authors!())
+        .version(crate_version!())
+        .about("Check stereo WAV-file for identical channels, detecting \
+                faux-stereo files generated by some audio-editing software and \
+                DAWs.\nOutputs a true-mono WAV file on detection of \
+                faux-stereo. Takes left channel of the input file, writes in the \
+                same location with -MONO suffix in file name.")
+        .arg(Arg::with_name("INPUT")
+                .help("Path to the input file to process. If no input given, \
+                process all WAV files in current directory.")
+                .index(1)
+                .validator(validate_path))
+        .arg(Arg::with_name("dither")
+                .short("d")
+                .long("dither")
+                .value_name("THRESHOLD")
+                .required(false)
+                .help("Set threshold for sample level difference to process \
+                        dithered audio.{n}Positive number (amplitude delta).")
+                .next_line_help(true)
+                .takes_value(true)
+                .default_value("10")
+                .validator(validate_u32))
+        .arg(Arg::with_name("license")
+                .short("l")
+                .long("license")
+                .help("Display the license information."))
+        .arg(Arg::with_name("dry_run")
+                .short("n")
+                .long("nowrite")
+                .help("Disable saving converted mono files. Analyze pass only.")
+                .required(false))
+        .arg(Arg::with_name("no_overwrites")
+                .short("p")
+                .long("protect")
+                .help("Disable overwriting when saving converted mono files.")
+                .required(false))
+        .get_matches();
+
+    if matches.is_present("license") {
+        println!("{}", LICENSE);
+        println!("\nclap (Command Line Argument Parser) License:");
+        println!(include_str!("../LICENSE-CLAP"));
+        process::exit(0);
+    }
+
+    let conf = Conf {
+        dither: if matches.is_present("dither") {
+            value_t!(matches, "dither", u32).unwrap_or(10)
+        } else {
+            0
+        },
+        dry_run: matches.is_present("dry_run"),
+        no_overwrites: matches.is_present("no_overwrites"),
+    };
+    let input_fname = if matches.is_present("INPUT") {
+            Some(matches.value_of("INPUT").unwrap().to_string())
+        } else {
+            None
+        };
+    (input_fname, conf)
+}
+
+pub fn validate_u32(value: String) -> Result<(), String> {
+    value.parse::<u32>()
+         .map(|_| ())
+         .map_err(|_| "Supplied parameter is not a valid number!".to_owned())
+}
+
+pub fn validate_path(path: String) -> Result<(), String> {
+    if fs::metadata(&path).is_ok() {
+        if path.to_lowercase().ends_with(".wav") {
+            Ok(())
+        } else {
+            // clap automatically adds "error: " to the beginning of the message.
+            Err(String::from("Input file must have .wav extension!"))
+        }
+    } else {
+        Err(String::from("Input file doesn't exist"))
+    }
+}