Extract logic into lib.rs

This commit is contained in:
Andrew Radev 2019-02-16 10:52:45 +02:00
parent 5a0d224be7
commit 03cb9fe656
3 changed files with 54 additions and 51 deletions

View File

@ -1,6 +1,8 @@
use std::env; use std::env;
use std::process; use std::process;
use id3_image::embed_image;
fn main() { fn main() {
let args: Vec<_> = env::args().collect(); let args: Vec<_> = env::args().collect();
@ -12,35 +14,8 @@ fn main() {
let music_filename = args[1].clone(); let music_filename = args[1].clone();
let image_filename = args[2].clone(); let image_filename = args[2].clone();
let mut tag = match id3::Tag::read_from_path(&music_filename) { if let Err(e) = embed_image(&music_filename, &image_filename) {
Ok(t) => t, eprintln!("{}", e);
Err(e) => {
eprintln!("Error reading music file {}: {}", music_filename, e);
process::exit(1);
},
};
let image = match image::open(&image_filename) {
Ok(i) => i,
Err(e) => {
eprintln!("Error reading image {}: {}", image_filename, e);
process::exit(1);
},
};
let mut encoded_image_bytes = Vec::new();
// Unwrap: Writing to a Vec should always succeed;
image.write_to(&mut encoded_image_bytes, image::ImageOutputFormat::JPEG(90)).unwrap();
tag.add_picture(id3::frame::Picture {
mime_type: "image/jpeg".to_string(),
picture_type: id3::frame::PictureType::Other,
description: String::new(),
data: encoded_image_bytes,
});
if let Err(e) = tag.write_to_path(music_filename, id3::Version::Id3v23) {
eprintln!("Error writing image to file: {}", e);
process::exit(1); process::exit(1);
} }
} }

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@ -1,6 +1,8 @@
use std::env; use std::env;
use std::process; use std::process;
use std::path::{Path, PathBuf}; use std::path::PathBuf;
use id3_image::extract_image;
fn main() { fn main() {
let args: Vec<_> = env::args().collect(); let args: Vec<_> = env::args().collect();
@ -13,27 +15,9 @@ fn main() {
let music_filename = args[1].clone(); let music_filename = args[1].clone();
let image_filename = args.get(2).cloned().unwrap_or_else(|| replace_extension(&music_filename, "jpg")); let image_filename = args.get(2).cloned().unwrap_or_else(|| replace_extension(&music_filename, "jpg"));
let tag = match id3::Tag::read_from_path(&music_filename) { if let Err(e) = extract_image(&music_filename, &image_filename) {
Ok(t) => t, eprintln!("{}", e);
Err(e) => {
eprintln!("Error reading music file {}: {}", music_filename, e);
process::exit(1); process::exit(1);
},
};
let first_picture = tag.pictures().next();
if let Some(p) = first_picture {
match image::load_from_memory(&p.data) {
Ok(image) => {
image.save(&image_filename);
println!("{}", image_filename);
},
Err(e) => {
eprintln!("Couldn't load image: {}", e);
process::exit(1);
}
};
} }
} }

44
src/lib.rs Normal file
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@ -0,0 +1,44 @@
use std::error::Error;
pub fn embed_image(music_filename: &str, image_filename: &str) -> Result<(), Box<Error>> {
let mut tag = id3::Tag::read_from_path(&music_filename).
map_err(|e| format!("Error reading music file {}: {}", music_filename, e))?;
let image = image::open(&image_filename).
map_err(|e| format!("Error reading image {}: {}", image_filename, e))?;
let mut encoded_image_bytes = Vec::new();
// Unwrap: Writing to a Vec should always succeed;
image.write_to(&mut encoded_image_bytes, image::ImageOutputFormat::JPEG(90)).unwrap();
tag.add_picture(id3::frame::Picture {
mime_type: "image/jpeg".to_string(),
picture_type: id3::frame::PictureType::Other,
description: String::new(),
data: encoded_image_bytes,
});
tag.write_to_path(music_filename, id3::Version::Id3v23).
map_err(|e| format!("Error writing image to file: {}", e))?;
Ok(())
}
pub fn extract_image(music_filename: &str, image_filename: &str) -> Result<(), Box<Error>> {
let tag = id3::Tag::read_from_path(&music_filename).
map_err(|e| format!("Error reading music file {}: {}", music_filename, e))?;
let first_picture = tag.pictures().next();
if let Some(p) = first_picture {
match image::load_from_memory(&p.data) {
Ok(image) => {
image.save(&image_filename);
println!("{}", image_filename);
},
Err(e) => return Err(format!("Couldn't load image: {}", e).into()),
};
}
Ok(())
}