Crate rtag

Crate rtag 

Source
Expand description

§Basic usage

This can be used by adding rtag to your dependencies in your project’s Cargo.toml.

[dependencies]
rtag = "0.3.5"

and this to your crate root:

extern crate rtag;

§Example: reading and filtering

When you read a frame information, you use [Unit](metadata/enum.Unit.html).

§Example: reading V1 frame.

use rtag::metadata::Unit;
use rtag::metadata::MetadataReader;

for m in MetadataReader::new("./test-resources/v1-v2.mp3").unwrap() {
    match m {
        Unit::FrameV1(frame) => {
            assert_eq!("Artist", frame.artist);
            assert_eq!("!@#$", frame.comment);
            assert_eq!("1", frame.track);
            assert_eq!("137", frame.genre);
        },
        _ => ()
    }
}

§Example: reading V2 frame.

 use rtag::frame::*;
 use rtag::metadata::Unit;
 use rtag::metadata::MetadataReader;

 for m in MetadataReader::new("./test-resources/240-pcnt.mp3").unwrap() {
     match m {
         Unit::FrameV2(head, FrameBody::PCNT(frame)) => {
             assert_eq!(256, frame.counter);
         },
         _ => ()
     }
 }

§Example: modifying a frame.

 use std::fs;
 use rtag::frame::*;
 use rtag::metadata::Unit;
 use rtag::metadata::MetadataReader;
 use rtag::metadata::MetadataWriter;

 let path = "./test-resources/240.test.mp3";
 fs::copy("./test-resources/240.mp3", path).unwrap();

 let new_data = MetadataReader::new(path)
     .unwrap()
     .fold(Vec::new(), |mut vec, unit| {
         if let Unit::FrameV2(frame_head, frame_body) = unit {
             let new_frame_body = if let FrameBody::TALB(ref frame) = frame_body {
                 let mut new_frame = frame.clone();
                 new_frame.text = "Album!".to_string();
                 FrameBody::TALB(new_frame)
             } else {
                 frame_body.clone()
             };

             vec.push(Unit::FrameV2(frame_head, new_frame_body));
         } else {
             vec.push(unit);
         }

         vec
     });

 let writer = MetadataWriter::new(path).unwrap();
 let _ = writer.write(new_data, false);
 let _ = fs::remove_file(path).unwrap();

§Example: rewriting all the frame to version 4.

 use std::fs;
 use rtag::frame::*;
 use rtag::metadata::Unit;
 use rtag::metadata::MetadataReader;
 use rtag::metadata::MetadataWriter;

 let path = "./test-resources/v2.2.test.mp3";
 fs::copy("./test-resources/v2.2.mp3", path).unwrap();

 let frames2_2 = MetadataReader::new(path).unwrap().collect::<Vec<Unit>>();
 let _ = MetadataWriter::new(path).unwrap().write(frames2_2, true);
 let i = MetadataReader::new(path)
     .unwrap()
     .filter(|unit| match unit {
         &Unit::FrameV2(FrameHeader::V22(_), _) => true,
         _ => false,
     });

 assert_eq!(i.count(), 0);

 let i = MetadataReader::new(path)
     .unwrap()
     .filter(|unit| match unit {
         &Unit::FrameV2(FrameHeader::V24(_), _) => true,
         _ => false,
     });

 assert_eq!(i.count(), 5);
 let _ = fs::remove_file(path).unwrap();

§Example: Looking into frame without property name of frame.

use rtag::frame::*;
use rtag::metadata::{Unit, MetadataReader};

for m in MetadataReader::new("./test-resources/240.mp3").unwrap() {
    match m {
        Unit::FrameV2(_, ref frame) => {

            let _ = frame.to_map(); // frame to map

            frame.inside(|key, value| {
                println!("{}: {}", key, value);
                
                true // continue or not
            });
        },
        _ => {}
    }
}

Modules§

frame
metadata
rw