rsnbs

A simple rust library to read and write .nbs files from Open Note Block Studio.

rsnbs has all the functionality pynbs has, like iterating over Note Block Studio songs

use rsnbs::read_nbs;

let song = read_nbs("song.nbs");
for note in song.notes {
  println!("tick: {}, instrument: {}", note.tick.unwrap(), note.instrument.unwrap())
}

or generating new songs programmatically

use rsnbs::{Song, Note};

let song = Song::default();
for i in 0..10 {
  Song.notes.push(Note {
    tick: Some(i), layer: None, instrument: None,
    velocity: 30, panning: None, pitch: None, key: Some(i+35)
  })
}

the main difference is that every field is an option (for version differences sake) where None acts as 0/"".

Installation

The package can be installed with cargo

$ cargo install rsnbs

Reading / Writing

You can use the read_nbs function to read an parse a specific NBS file of any version.

  let song = rsnbs::read_nbs("song.nbs");

This returns a rsnbs::Song object wich can then be written using Song::save

  song.save("song.nbs", version);

Song struct

Song implements the Default trait so you can instance a default with 1 layer and all None fields

  let song = Song::default();

Fields

Header

the first field is header, the file header, of type struct Header

Attribute	Type	Details
header.version	i8	The NBS version this file was saved on.
header.default_instruments	i8	The amount of instruments from vanilla Minecraft in the song.
header.song_length	i16	The length of the song, measured in ticks.
header.song_layers	i16	The ID of the last layer with at least one note block in it.
header.song_name	String	The name of the song.
header.song_author	String	The author of the song.
header.original_author	String	The original song author of the song.
header.description	String	The description of the song.
header.tempo	i16	The tempo of the song multiplied by 100.
header.auto_save	bool	Whether auto-saving has been enabled.
header.auto_save_duration	i8	The amount of minutes between each auto-save.
header.time_signature	i8	The time signature of the song.
header.minutes_spent	i32	The amount of minutes spent on the project.
header.left_clicks	i32	The amount of times the user has left-clicked.
header.right_clicks	i32	The amount of times the user has right-clicked.
header.blocks_added	i32	The amount of times the user has added a block.
header.blocks_removed	i32	The amount of times the user has removed a block.
header.song_origin	String	The file name of the original MIDI or schematic.
header.loop	bool	Whether the song should loop back to the start after ending.
header.max_loop_count	i8	The amount of times to loop. 0 = infinite.
header.loop_start	i16	The tick the song will loop back to at the end of playback.

Notes

the notes field has all the notes of type struct Note stored in a vec in order

Attribute	Type	Details
note.tick	i32	The tick at which the note plays.
note.layer	i32	The ID of the layer in which the note is placed.
note.instrument	i8	The ID of the instrument.
note.key	i8	The key of the note. (between 0 and 87)
note.velocity	i8	The velocity of the note. (between 0 and 100)
note.panning	u8	The stereo panning of the note. (between -100 and 100)
note.pitch	i16	The detune of the note, in cents. (between -1200 and 1200)

Layers

the layers field is a vec of all layers of type struct Layer in order

Attribute	Type	Details
layer.name	String	The name of the layer.
layer.lock	bool	Whether the layer is locked.
layer.volume	i8	The volume of the layer.
layer.panning	u8	The stereo panning of the layer.

Instruments

the instruments field stores all the custom instruments of the song in order in a vec

Attribute	Type	Details
instrument.name	String	The name of the instrument.
instrument.file	String	The name of the sound file of the instrument.
instrument.pitch	i8	The pitch of the instrument. (between 0 and 87)
instrument.press_key	bool	Whether the piano should automatically press keys with the instrument when the marker passes them.