Restructure project

src/ape/mod.rs

@@ -1,21 +1,32 @@
+//! APE specific items
+//!
+//! ## File notes
+//!
+//! It is possible for an `APE` file to contain an `ID3v2` tag. For the sake of data preservation,
+//! this tag will be read, but **cannot** be written. The only tags allowed by spec are `APEv1/2` and
+//! `ID3v1`.
 mod constants;
-pub(crate) mod properties;
-pub(crate) mod read;
+mod properties;
+mod read;
 pub(crate) mod tag;
 pub(crate) mod write;
 
+pub use crate::ape::properties::ApeProperties;
+#[cfg(feature = "ape")]
+pub use {
+	crate::types::picture::APE_PICTURE_TYPES,
+	tag::{ape_tag::ApeTag, item::ApeItem},
+};
+
 use crate::error::Result;
 #[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1Tag;
+use crate::id3::v1::tag::Id3v1Tag;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::tag_methods;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::{Tag, TagType};
-use properties::ApeProperties;
-#[cfg(feature = "ape")]
-use tag::ape_tag::ApeTag;
 
 use std::io::{Read, Seek};
 

src/ape/read.rs

@@ -2,13 +2,13 @@ use super::constants::APE_PREAMBLE;
 #[cfg(feature = "ape")]
 use super::tag::{ape_tag::ApeTag, read::read_ape_tag};
 use super::{ApeFile, ApeProperties};
+use crate::ape::tag::read_ape_header;
 use crate::error::{LoftyError, Result};
-use crate::logic::ape::tag::read_ape_header;
 #[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1Tag;
+use crate::id3::v1::tag::Id3v1Tag;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::{read::parse_id3v2, tag::Id3v2Tag};
-use crate::logic::id3::{find_id3v1, find_id3v2, find_lyrics3v2};
+use crate::id3::v2::{read::parse_id3v2, tag::Id3v2Tag};
+use crate::id3::{find_id3v1, find_id3v2, find_lyrics3v2};
 
 use std::io::{Read, Seek, SeekFrom};
 

src/ape/tag/ape_tag.rs

@@ -1,5 +1,5 @@
+use crate::ape::tag::item::{ApeItem, ApeItemRef};
 use crate::error::Result;
-use crate::logic::ape::tag::item::{ApeItem, ApeItemRef};
 use crate::types::item::{ItemKey, ItemValue, TagItem};
 use crate::types::tag::{Accessor, Tag, TagType};
 
@@ -199,7 +199,7 @@ impl From<Tag> for ApeTag {
 	}
 }
 
-pub(in crate::logic) struct ApeTagRef<'a> {
+pub(crate) struct ApeTagRef<'a> {
 	pub(crate) read_only: bool,
 	pub(super) items: Box<dyn Iterator<Item = ApeItemRef<'a>> + 'a>,
 }
@@ -239,7 +239,7 @@ mod tests {
 	use crate::ape::{ApeItem, ApeTag};
 	use crate::{ItemValue, Tag, TagType};
 
-	use crate::logic::ape::tag::read_ape_header;
+	use crate::ape::tag::read_ape_header;
 	use std::io::{Cursor, Read};
 
 	#[test]
@@ -300,7 +300,7 @@ mod tests {
 		let mut reader = Cursor::new(tag);
 
 		let header = read_ape_header(&mut reader, false).unwrap();
-		let parsed_tag = crate::logic::ape::tag::read::read_ape_tag(&mut reader, header).unwrap();
+		let parsed_tag = crate::ape::tag::read::read_ape_tag(&mut reader, header).unwrap();
 
 		assert_eq!(expected_tag.items().len(), parsed_tag.items().len());
 
@@ -321,11 +321,11 @@ mod tests {
 		let mut reader = Cursor::new(tag_bytes);
 
 		let header = read_ape_header(&mut reader, false).unwrap();
-		let ape = crate::logic::ape::tag::read::read_ape_tag(&mut reader, header).unwrap();
+		let ape = crate::ape::tag::read::read_ape_tag(&mut reader, header).unwrap();
 
 		let tag: Tag = ape.into();
 
-		crate::logic::test_utils::verify_tag(&tag, true, true);
+		crate::tag_utils::test_utils::verify_tag(&tag, true, true);
 	}
 
 	#[test]
@@ -337,7 +337,7 @@ mod tests {
 			);
 		}
 
-		let tag = crate::logic::test_utils::create_tag(TagType::Ape);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::Ape);
 
 		let ape_tag: ApeTag = tag.into();
 

src/ape/tag/item.rs

@@ -1,5 +1,5 @@
+use crate::ape::constants::INVALID_KEYS;
 use crate::error::{LoftyError, Result};
-use crate::logic::ape::constants::INVALID_KEYS;
 use crate::types::item::{ItemValue, ItemValueRef, TagItem};
 use crate::types::tag::TagType;
 
@@ -80,7 +80,7 @@ impl TryFrom<TagItem> for ApeItem {
 	}
 }
 
-pub(in crate::logic) struct ApeItemRef<'a> {
+pub(crate) struct ApeItemRef<'a> {
 	pub read_only: bool,
 	pub key: &'a str,
 	pub value: ItemValueRef<'a>,

src/ape/tag/mod.rs

@@ -3,9 +3,9 @@ pub(crate) mod ape_tag;
 #[cfg(feature = "ape")]
 pub(crate) mod item;
 #[cfg(feature = "ape")]
-pub(in crate::logic) mod read;
+pub(crate) mod read;
 #[cfg(feature = "ape")]
-pub(in crate::logic) mod write;
+mod write;
 
 use crate::error::{LoftyError, Result};
 

src/ape/tag/read.rs

@@ -1,6 +1,6 @@
 use super::{ape_tag::ApeTag, item::ApeItem, ApeHeader};
+use crate::ape::constants::INVALID_KEYS;
 use crate::error::{LoftyError, Result};
-use crate::logic::ape::constants::INVALID_KEYS;
 use crate::types::item::ItemValue;
 
 use std::io::{Read, Seek, SeekFrom};

src/ape/tag/write.rs

@@ -1,8 +1,8 @@
 use super::read::read_ape_tag;
+use crate::ape::constants::APE_PREAMBLE;
+use crate::ape::tag::ape_tag::ApeTagRef;
 use crate::error::{LoftyError, Result};
-use crate::logic::ape::constants::APE_PREAMBLE;
-use crate::logic::ape::tag::ape_tag::ApeTagRef;
-use crate::logic::id3::{find_id3v1, find_id3v2, find_lyrics3v2};
+use crate::id3::{find_id3v1, find_id3v2, find_lyrics3v2};
 use crate::probe::Probe;
 use crate::types::file::FileType;
 use crate::types::item::ItemValueRef;
@@ -10,11 +10,11 @@ use crate::types::item::ItemValueRef;
 use std::fs::File;
 use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 
-use crate::logic::ape::tag::read_ape_header;
+use crate::ape::tag::read_ape_header;
 use byteorder::{LittleEndian, WriteBytesExt};
 
 #[allow(clippy::shadow_unrelated)]
-pub(in crate::logic) fn write_to(data: &mut File, tag: &mut ApeTagRef) -> Result<()> {
+pub(crate) fn write_to(data: &mut File, tag: &mut ApeTagRef) -> Result<()> {
 	let probe = Probe::new(data).guess_file_type()?;
 
 	match probe.file_type() {

src/ape/write.rs

@@ -1,15 +1,15 @@
-use crate::error::{LoftyError, Result};
 #[cfg(feature = "ape")]
-use crate::logic::ape::tag::ape_tag::ApeTagRef;
+use crate::ape::tag::ape_tag::ApeTagRef;
+use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1TagRef;
+use crate::id3::v1::tag::Id3v1TagRef;
 #[allow(unused_imports)]
 use crate::types::tag::{Tag, TagType};
 
 use std::fs::File;
 
 #[allow(unused_variables)]
-pub(in crate::logic) fn write_to(data: &mut File, tag: &Tag) -> Result<()> {
+pub(crate) fn write_to(data: &mut File, tag: &Tag) -> Result<()> {
 	match tag.tag_type() {
 		#[cfg(feature = "ape")]
 		TagType::Ape => Into::<ApeTagRef>::into(tag).write_to(data),

src/error.rs

@@ -1,7 +1,8 @@
-use ogg_pager::PageError;
 use std::fmt::{Display, Formatter};
 
-/// Result of tag operations
+use ogg_pager::PageError;
+
+/// Alias for `Result<T, LoftyError>`
 pub type Result<T> = std::result::Result<T, LoftyError>;
 
 /// Errors that could occur within Lofty
@@ -21,7 +22,7 @@ pub enum LoftyError {
 
 	// Picture related errors
 	#[cfg(feature = "id3v2")]
-	/// Arises when an invalid picture format is parsed. Only applicable to [`Id3v2Version::V2`](crate::logic::id3::v2::Id3v2Version)
+	/// Arises when an invalid picture format is parsed. Only applicable to [`Id3v2Version::V2`](crate::id3::v2::Id3v2Version)
 	BadPictureFormat(String),
 	/// Provided an invalid picture
 	NotAPicture,

src/id3/mod.rs

@@ -1,6 +1,11 @@
+//! ID3 specific items
+//!
+//! ID3 does things differently than other tags, making working with them a little more effort than other formats.
+//! Check the other modules for important notes and/or warnings.
+
 #[cfg(feature = "id3v1")]
-pub(crate) mod v1;
-pub(crate) mod v2;
+pub mod v1;
+pub mod v2;
 
 use crate::error::{LoftyError, Result};
 use v2::{read_id3v2_header, Id3v2Header};
@@ -37,10 +42,7 @@ where
 }
 
 #[cfg(feature = "id3v1")]
-pub(in crate::logic) fn find_id3v1<R>(
-	data: &mut R,
-	read: bool,
-) -> Result<(bool, Option<v1::tag::Id3v1Tag>)>
+pub(crate) fn find_id3v1<R>(data: &mut R, read: bool) -> Result<(bool, Option<v1::tag::Id3v1Tag>)>
 where
 	R: Read + Seek,
 {
@@ -74,7 +76,7 @@ where
 }
 
 #[cfg(not(feature = "id3v1"))]
-pub(in crate::logic) fn find_id3v1<R>(data: &mut R, _read: bool) -> Result<(bool, Option<()>)>
+pub(in crate::tag_utils) fn find_id3v1<R>(data: &mut R, _read: bool) -> Result<(bool, Option<()>)>
 where
 	R: Read + Seek,
 {

src/id3/v1/mod.rs

@@ -0,0 +1,23 @@
+//! ID3v1 items
+//!
+//! # ID3v1 notes
+//!
+//! See also: [Id3v1Tag]
+//!
+//! ## Genres
+//!
+//! ID3v1 stores the genre in a single byte ranging from 0 to 192 (inclusive).
+//! All possible genres have been stored in the [`GENRES`] constant.
+//!
+//! ## Track Numbers
+//!
+//! ID3v1 stores the track number in a non-zero byte.
+//! A track number of 0 will be treated as an empty field.
+//! Additionally, there is no track total field.
+pub(crate) mod constants;
+pub(crate) mod read;
+pub(crate) mod tag;
+pub(crate) mod write;
+
+pub use crate::id3::v1::constants::GENRES;
+pub use crate::id3::v1::tag::Id3v1Tag;

src/id3/v1/tag.rs

@@ -1,5 +1,5 @@
 use crate::error::Result;
-use crate::logic::id3::v1::constants::GENRES;
+use crate::id3::v1::constants::GENRES;
 use crate::types::item::{ItemKey, ItemValue, TagItem};
 use crate::types::tag::{Accessor, Tag, TagType};
 
@@ -173,7 +173,7 @@ impl From<Tag> for Id3v1Tag {
 	}
 }
 
-pub(in crate::logic) struct Id3v1TagRef<'a> {
+pub(crate) struct Id3v1TagRef<'a> {
 	pub title: Option<&'a str>,
 	pub artist: Option<&'a str>,
 	pub album: Option<&'a str>,
@@ -263,7 +263,7 @@ mod tests {
 			.read_exact(&mut tag)
 			.unwrap();
 
-		let parsed_tag = crate::logic::id3::v1::read::parse_id3v1(tag);
+		let parsed_tag = crate::id3::v1::read::parse_id3v1(tag);
 
 		assert_eq!(expected_tag, parsed_tag);
 	}
@@ -276,16 +276,16 @@ mod tests {
 			.read_exact(&mut tag_bytes)
 			.unwrap();
 
-		let id3v1 = crate::logic::id3::v1::read::parse_id3v1(tag_bytes);
+		let id3v1 = crate::id3::v1::read::parse_id3v1(tag_bytes);
 
 		let tag: Tag = id3v1.into();
 
-		crate::logic::test_utils::verify_tag(&tag, true, true);
+		crate::tag_utils::test_utils::verify_tag(&tag, true, true);
 	}
 
 	#[test]
 	fn tag_to_id3v1() {
-		let tag = crate::logic::test_utils::create_tag(TagType::Id3v1);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::Id3v1);
 
 		let id3v1_tag: Id3v1Tag = tag.into();
 

src/id3/v1/write.rs

@@ -1,6 +1,6 @@
 use super::tag::Id3v1TagRef;
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::find_id3v1;
+use crate::id3::find_id3v1;
 use crate::probe::Probe;
 use crate::types::file::FileType;
 
@@ -10,7 +10,7 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 use byteorder::WriteBytesExt;
 
 #[allow(clippy::shadow_unrelated)]
-pub(in crate::logic) fn write_id3v1(writer: &mut File, tag: &Id3v1TagRef) -> Result<()> {
+pub(crate) fn write_id3v1(writer: &mut File, tag: &Id3v1TagRef) -> Result<()> {
 	let probe = Probe::new(writer).guess_file_type()?;
 
 	match probe.file_type() {

src/id3/v2/frame/content.rs

@@ -1,14 +1,14 @@
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::frame::{EncodedTextFrame, FrameValue, LanguageFrame};
-use crate::logic::id3::v2::util::text_utils::{decode_text, TextEncoding};
-use crate::logic::id3::v2::Id3v2Version;
+use crate::id3::v2::frame::{EncodedTextFrame, FrameValue, LanguageFrame};
+use crate::id3::v2::util::text_utils::{decode_text, TextEncoding};
+use crate::id3::v2::Id3v2Version;
 use crate::types::picture::Picture;
 
 use std::io::Read;
 
 use byteorder::ReadBytesExt;
 
-pub(crate) fn parse_content(
+pub(super) fn parse_content(
 	content: &mut &[u8],
 	id: &str,
 	version: Id3v2Version,

src/id3/v2/frame/header.rs

@@ -1,7 +1,7 @@
 use super::FrameFlags;
 use crate::error::{LoftyError, Result};
+use crate::id3::v2::util::upgrade::{upgrade_v2, upgrade_v3};
 use crate::id3::v2::FrameID;
-use crate::logic::id3::v2::util::upgrade::{upgrade_v2, upgrade_v3};
 
 use std::io::Read;
 
@@ -52,7 +52,7 @@ where
 	let id_str = std::str::from_utf8(&frame_header[..4]).map_err(|_| LoftyError::BadFrameID)?;
 
 	let (id, size) = if synchsafe {
-		let size = crate::logic::id3::v2::unsynch_u32(u32::from_be_bytes([
+		let size = crate::id3::v2::unsynch_u32(u32::from_be_bytes([
 			frame_header[4],
 			frame_header[5],
 			frame_header[6],

src/id3/v2/frame/mod.rs

@@ -1,11 +1,11 @@
-pub(in crate::logic::id3::v2) mod content;
+mod content;
 mod header;
-pub(in crate::logic::id3::v2) mod read;
+pub(super) mod read;
 
 use super::util::text_utils::TextEncoding;
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::util::text_utils::encode_text;
-use crate::logic::id3::v2::util::upgrade::{upgrade_v2, upgrade_v3};
+use crate::id3::v2::util::text_utils::encode_text;
+use crate::id3::v2::util::upgrade::{upgrade_v2, upgrade_v3};
 use crate::types::item::{ItemKey, ItemValue, TagItem};
 use crate::types::picture::Picture;
 use crate::types::tag::TagType;

src/id3/v2/frame/read.rs

@@ -1,9 +1,9 @@
 use super::header::{parse_header, parse_v2_header};
 use super::Frame;
 use crate::error::{LoftyError, Result};
+use crate::id3::v2::frame::content::parse_content;
 use crate::id3::v2::FrameValue;
-use crate::logic::id3::v2::frame::content::parse_content;
-use crate::logic::id3::v2::Id3v2Version;
+use crate::id3::v2::Id3v2Version;
 
 use std::io::Read;
 
@@ -28,7 +28,7 @@ impl Frame {
 		reader.read_exact(&mut content)?;
 
 		if flags.unsynchronisation {
-			content = crate::logic::id3::v2::util::unsynch_content(content.as_slice())?;
+			content = crate::id3::v2::util::unsynch_content(content.as_slice())?;
 		}
 
 		if flags.compression {

src/id3/v2/items/encapsulated_object.rs

@@ -1,5 +1,5 @@
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::util::text_utils::{decode_text, encode_text, TextEncoding};
+use crate::id3::v2::util::text_utils::{decode_text, encode_text, TextEncoding};
 
 use std::io::{Cursor, Read};
 

src/id3/v2/items/mod.rs

@@ -0,0 +1,4 @@
+pub(super) mod encapsulated_object;
+#[cfg(feature = "id3v2_restrictions")]
+pub(super) mod restrictions;
+pub(super) mod sync_text;

src/id3/v2/items/sync_text.rs

@@ -3,8 +3,8 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::util::text_utils;
-use crate::logic::id3::v2::util::text_utils::{
+use crate::id3::v2::util::text_utils;
+use crate::id3::v2::util::text_utils::{
 	decode_text, encode_text, read_to_terminator, utf16_decode, TextEncoding,
 };
 

src/id3/v2/mod.rs

@@ -1,20 +1,48 @@
-pub(crate) mod flags;
+//! ID3v2 items and utilities
+//!
+//! ## Important notes
+//!
+//! See:
+//!
+//! * [Id3v2Tag]
+//! * [Frame]
+mod flags;
 #[cfg(feature = "id3v2")]
-pub(crate) mod frame;
+mod frame;
 #[cfg(feature = "id3v2")]
-pub(crate) mod items;
+mod items;
 #[cfg(feature = "id3v2")]
 pub(crate) mod read;
 #[cfg(feature = "id3v2")]
 pub(crate) mod tag;
 pub(crate) mod util;
 #[cfg(feature = "id3v2")]
-pub(in crate::logic) mod write;
+pub(crate) mod write;
+
+#[cfg(feature = "id3v2")]
+pub use frame::{EncodedTextFrame, Frame, FrameFlags, FrameID, FrameValue, LanguageFrame};
+#[cfg(feature = "id3v2")]
+pub use items::{
+	encapsulated_object::{GEOBInformation, GeneralEncapsulatedObject},
+	sync_text::{SyncTextContentType, SyncTextInformation, SynchronizedText, TimestampFormat},
+};
+#[cfg(feature = "id3v2")]
+pub use tag::Id3v2Tag;
+pub use util::text_utils::TextEncoding;
+#[cfg(feature = "id3v2")]
+pub use util::upgrade::{upgrade_v2, upgrade_v3};
+
+#[cfg(feature = "id3v2")]
+pub use flags::Id3v2TagFlags;
+#[cfg(not(feature = "id3v2"))]
+use flags::Id3v2TagFlags;
+
+#[cfg(feature = "id3v2_restrictions")]
+pub use crate::id3::v2::items::restrictions::*;
 
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v2_restrictions")]
-use crate::logic::id3::v2::items::restrictions::TagRestrictions;
-use flags::Id3v2TagFlags;
+use crate::id3::v2::items::restrictions::TagRestrictions;
 
 use std::io::Read;
 

src/id3/v2/tag.rs

@@ -4,7 +4,7 @@ use super::frame::{Frame, FrameID, FrameValue};
 use super::util::text_utils::TextEncoding;
 use super::Id3v2Version;
 use crate::error::Result;
-use crate::logic::id3::v2::frame::FrameRef;
+use crate::id3::v2::frame::FrameRef;
 use crate::types::item::{ItemKey, ItemValue, TagItem};
 use crate::types::tag::{Accessor, Tag, TagType};
 
@@ -300,7 +300,7 @@ pub(crate) struct Id3v2TagRef<'a> {
 }
 
 impl<'a> Id3v2TagRef<'a> {
-	pub(in crate::logic) fn write_to(&mut self, file: &mut File) -> Result<()> {
+	pub(crate) fn write_to(&mut self, file: &mut File) -> Result<()> {
 		super::write::write_id3v2(file, self)
 	}
 }
@@ -333,7 +333,7 @@ mod tests {
 	use crate::id3::v2::{Frame, FrameFlags, FrameValue, Id3v2Tag, LanguageFrame, TextEncoding};
 	use crate::{Tag, TagType};
 
-	use crate::logic::id3::v2::read_id3v2_header;
+	use crate::id3::v2::read_id3v2_header;
 	use std::io::Read;
 
 	#[test]
@@ -439,7 +439,7 @@ mod tests {
 		let mut reader = std::io::Cursor::new(&tag[..]);
 
 		let header = read_id3v2_header(&mut reader).unwrap();
-		let parsed_tag = crate::logic::id3::v2::read::parse_id3v2(&mut reader, header).unwrap();
+		let parsed_tag = crate::id3::v2::read::parse_id3v2(&mut reader, header).unwrap();
 
 		assert_eq!(expected_tag, parsed_tag);
 	}
@@ -456,11 +456,11 @@ mod tests {
 		let mut reader = std::io::Cursor::new(&tag_bytes[..]);
 
 		let header = read_id3v2_header(&mut reader).unwrap();
-		let id3v2 = crate::logic::id3::v2::read::parse_id3v2(&mut reader, header).unwrap();
+		let id3v2 = crate::id3::v2::read::parse_id3v2(&mut reader, header).unwrap();
 
 		let tag: Tag = id3v2.into();
 
-		crate::logic::test_utils::verify_tag(&tag, true, true);
+		crate::tag_utils::test_utils::verify_tag(&tag, true, true);
 	}
 
 	#[test]
@@ -481,7 +481,7 @@ mod tests {
 			);
 		}
 
-		let tag = crate::logic::test_utils::create_tag(TagType::Id3v2);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::Id3v2);
 
 		let id3v2_tag: Id3v2Tag = tag.into();
 

src/id3/v2/util/mod.rs

@@ -6,7 +6,7 @@ pub(crate) mod upgrade;
 use crate::error::{LoftyError, Result};
 
 #[cfg(feature = "id3v2")]
-pub(crate) fn unsynch_content(content: &[u8]) -> Result<Vec<u8>> {
+pub(in crate::id3::v2) fn unsynch_content(content: &[u8]) -> Result<Vec<u8>> {
 	let mut unsynch_content = Vec::new();
 
 	let mut discard = false;

src/id3/v2/util/upgrade.rs

@@ -1,23 +1,39 @@
+use std::collections::HashMap;
+
 macro_rules! gen_upgrades {
-    (V2 => [$($($v2_key:tt)|* => $id3v24_from_v2:tt),+]; V3 => [$($($v3_key:tt)|* => $id3v24_from_v3:tt),+]) => {
+    (V2 => [$($($v2_key:literal)|* => $id3v24_from_v2:literal),+]; V3 => [$($($v3_key:literal)|* => $id3v24_from_v3:literal),+]) => {
+		lazy_static::lazy_static! {
+			static ref V2KEYS: HashMap<&'static str, &'static str> = {
+				let mut map = HashMap::new();
+				$(
+					$(
+						map.insert($v2_key, $id3v24_from_v2);
+					)+
+				)+
+				map
+			};
+		}
+
+		lazy_static::lazy_static! {
+			static ref V3KEYS: HashMap<&'static str, &'static str> = {
+				let mut map = HashMap::new();
+				$(
+					$(
+						map.insert($v3_key, $id3v24_from_v3);
+					)+
+				)+
+				map
+			};
+		}
+
 		/// Upgrade an ID3v2.2 key to an ID3v2.4 key
         pub fn upgrade_v2(key: &str) -> Option<&'static str> {
-            match key {
-                $(
-                    $($v2_key)|* => Some($id3v24_from_v2),
-                )+
-                _ => None
-            }
+            V2KEYS.get(key).map(|s| *s)
         }
 
 		/// Upgrade an ID3v2.3 key to an ID3v2.4 key
         pub fn upgrade_v3(key: &str) -> Option<&'static str> {
-            match key {
-                $(
-                    $($v3_key)|* => Some($id3v24_from_v3),
-                )+
-                _ => None
-            }
+            V3KEYS.get(key).map(|s| *s)
         }
     }
 }

src/id3/v2/write/chunk_file.rs

@@ -1,12 +1,12 @@
 use crate::error::Result;
-use crate::logic::iff::chunk::Chunks;
+use crate::iff::chunk::Chunks;
 
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom, Write};
 
 use byteorder::{ByteOrder, WriteBytesExt};
 
-pub(in crate::logic::id3::v2) fn write_to_chunk_file<B>(data: &mut File, tag: &[u8]) -> Result<()>
+pub(in crate::id3::v2) fn write_to_chunk_file<B>(data: &mut File, tag: &[u8]) -> Result<()>
 where
 	B: ByteOrder,
 {

src/id3/v2/write/frame.rs

@@ -1,13 +1,13 @@
 use crate::error::{LoftyError, Result};
+use crate::id3::v2::frame::{FrameFlags, FrameRef, FrameValueRef};
+use crate::id3::v2::synch_u32;
 use crate::id3::v2::Id3v2Version;
-use crate::logic::id3::v2::frame::{FrameFlags, FrameRef, FrameValueRef};
-use crate::logic::id3::v2::synch_u32;
 
 use std::io::Write;
 
 use byteorder::{BigEndian, WriteBytesExt};
 
-pub(in crate::logic::id3::v2) fn create_items<'a, W>(
+pub(in crate::id3::v2) fn create_items<'a, W>(
 	writer: &mut W,
 	frames: &mut dyn Iterator<Item = FrameRef<'a>>,
 ) -> Result<()>

src/id3/v2/write/mod.rs

@@ -3,8 +3,8 @@ mod frame;
 
 use super::Id3v2TagFlags;
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::tag::Id3v2TagRef;
-use crate::logic::id3::{find_id3v2, v2::synch_u32};
+use crate::id3::v2::tag::Id3v2TagRef;
+use crate::id3::{find_id3v2, v2::synch_u32};
 use crate::probe::Probe;
 use crate::types::file::FileType;
 
@@ -14,7 +14,7 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 use byteorder::{BigEndian, ByteOrder, LittleEndian, WriteBytesExt};
 
 #[allow(clippy::shadow_unrelated)]
-pub(in crate::logic) fn write_id3v2(data: &mut File, tag: &mut Id3v2TagRef) -> Result<()> {
+pub(crate) fn write_id3v2(data: &mut File, tag: &mut Id3v2TagRef) -> Result<()> {
 	let probe = Probe::new(data).guess_file_type()?;
 
 	match probe.file_type() {
@@ -48,10 +48,7 @@ pub(in crate::logic) fn write_id3v2(data: &mut File, tag: &mut Id3v2TagRef) -> R
 }
 
 // Formats such as WAV and AIFF store the ID3v2 tag in an 'ID3 ' chunk rather than at the beginning of the file
-pub(in crate::logic) fn write_id3v2_to_chunk_file<B>(
-	data: &mut File,
-	tag: &mut Id3v2TagRef,
-) -> Result<()>
+fn write_id3v2_to_chunk_file<B>(data: &mut File, tag: &mut Id3v2TagRef) -> Result<()>
 where
 	B: ByteOrder,
 {

src/iff/aiff/mod.rs

@@ -2,12 +2,12 @@ mod properties;
 mod read;
 #[cfg(feature = "aiff_text_chunks")]
 pub(crate) mod tag;
-pub(in crate::logic) mod write;
+pub(crate) mod write;
 
 use crate::error::Result;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::tag_methods;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::{Tag, TagType};

src/iff/aiff/read.rs

@@ -3,15 +3,15 @@ use super::tag::AiffTextChunks;
 use super::AiffFile;
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::iff::chunk::Chunks;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::iff::chunk::Chunks;
 use crate::types::properties::FileProperties;
 
 use std::io::{Read, Seek, SeekFrom};
 
 use byteorder::BigEndian;
 
-pub(in crate::logic::iff) fn verify_aiff<R>(data: &mut R) -> Result<()>
+pub(in crate::iff) fn verify_aiff<R>(data: &mut R) -> Result<()>
 where
 	R: Read + Seek,
 {
@@ -25,7 +25,7 @@ where
 	Ok(())
 }
 
-pub(in crate::logic) fn read_from<R>(data: &mut R, read_properties: bool) -> Result<AiffFile>
+pub(crate) fn read_from<R>(data: &mut R, read_properties: bool) -> Result<AiffFile>
 where
 	R: Read + Seek,
 {

src/iff/aiff/tag.rs

@@ -1,5 +1,5 @@
 use crate::error::Result;
-use crate::logic::iff::chunk::Chunks;
+use crate::iff::chunk::Chunks;
 use crate::types::item::{ItemKey, ItemValue, TagItem};
 use crate::types::tag::{Accessor, Tag, TagType};
 
@@ -146,12 +146,12 @@ impl<'a> Into<AiffTextChunksRef<'a>> for &'a Tag {
 }
 
 impl<'a> AiffTextChunksRef<'a> {
-	pub(in crate::logic) fn write_to(&self, file: &mut File) -> Result<()> {
+	pub(crate) fn write_to(&self, file: &mut File) -> Result<()> {
 		write_to(file, self)
 	}
 }
 
-pub(in crate::logic) fn write_to(data: &mut File, tag: &AiffTextChunksRef) -> Result<()> {
+pub(crate) fn write_to(data: &mut File, tag: &AiffTextChunksRef) -> Result<()> {
 	fn write_chunk(writer: &mut Vec<u8>, key: &str, value: Option<&str>) {
 		if let Some(val) = value {
 			if let Ok(len) = u32::try_from(val.len()) {

src/iff/aiff/write.rs

@@ -1,8 +1,8 @@
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2TagRef;
+use crate::id3::v2::tag::Id3v2TagRef;
 #[cfg(feature = "aiff_text_chunks")]
-use crate::logic::iff::aiff::tag::AiffTextChunksRef;
+use crate::iff::aiff::tag::AiffTextChunksRef;
 #[allow(unused_imports)]
 use crate::types::tag::{Tag, TagType};
 

src/iff/chunk.rs

@@ -1,16 +1,16 @@
 use crate::error::Result;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::read::parse_id3v2;
+use crate::id3::v2::read::parse_id3v2;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
+use crate::id3::v2::tag::Id3v2Tag;
 
 use std::io::{Read, Seek, SeekFrom};
 use std::marker::PhantomData;
 
-use crate::logic::id3::v2::read_id3v2_header;
+use crate::id3::v2::read_id3v2_header;
 use byteorder::{ByteOrder, ReadBytesExt};
 
-pub(in crate::logic) struct Chunks<B>
+pub(crate) struct Chunks<B>
 where
 	B: ByteOrder,
 {

src/iff/mod.rs

@@ -0,0 +1,13 @@
+//! WAV/AIFF specific items
+pub(crate) mod aiff;
+pub(crate) mod chunk;
+pub(crate) mod wav;
+
+pub use crate::iff::aiff::AiffFile;
+pub use crate::iff::wav::WavFile;
+
+#[cfg(feature = "aiff_text_chunks")]
+pub use crate::iff::aiff::tag::AiffTextChunks;
+#[cfg(feature = "riff_info_list")]
+pub use crate::iff::wav::tag::RiffInfoList;
+pub use wav::{WavFormat, WavProperties};

src/iff/wav/mod.rs

@@ -1,17 +1,18 @@
-pub(crate) mod properties;
+mod properties;
 mod read;
 #[cfg(feature = "riff_info_list")]
 pub(crate) mod tag;
-pub(in crate::logic) mod write;
+pub(crate) mod write;
+
+pub use crate::iff::wav::properties::{WavFormat, WavProperties};
 
 use crate::error::Result;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::tag_methods;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::{Tag, TagType};
-use properties::WavProperties;
 #[cfg(feature = "riff_info_list")]
 use tag::RiffInfoList;
 

src/iff/wav/read.rs

@@ -4,14 +4,14 @@ use super::tag::RiffInfoList;
 use super::WavFile;
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::iff::chunk::Chunks;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::iff::chunk::Chunks;
 
 use std::io::{Read, Seek, SeekFrom};
 
 use byteorder::{LittleEndian, ReadBytesExt};
 
-pub(in crate::logic::iff) fn verify_wav<T>(data: &mut T) -> Result<()>
+pub(in crate::iff) fn verify_wav<T>(data: &mut T) -> Result<()>
 where
 	T: Read + Seek,
 {
@@ -29,7 +29,7 @@ where
 	Ok(())
 }
 
-pub(in crate::logic) fn read_from<R>(data: &mut R, read_properties: bool) -> Result<WavFile>
+pub(crate) fn read_from<R>(data: &mut R, read_properties: bool) -> Result<WavFile>
 where
 	R: Read + Seek,
 {

src/iff/wav/tag/mod.rs

@@ -1,5 +1,5 @@
-pub(in crate::logic::iff::wav) mod read;
-pub(in crate::logic::iff::wav) mod write;
+pub(super) mod read;
+mod write;
 
 use crate::error::Result;
 use crate::types::item::{ItemKey, ItemValue, TagItem};
@@ -243,12 +243,12 @@ mod tests {
 
 		let tag: Tag = riff_info.into();
 
-		crate::logic::test_utils::verify_tag(&tag, true, false);
+		crate::tag_utils::test_utils::verify_tag(&tag, true, false);
 	}
 
 	#[test]
 	fn tag_to_riff_info() {
-		let tag = crate::logic::test_utils::create_tag(TagType::RiffInfo);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::RiffInfo);
 
 		let riff_info: RiffInfoList = tag.into();
 

src/iff/wav/tag/read.rs

@@ -1,12 +1,12 @@
 use super::RiffInfoList;
 use crate::error::{LoftyError, Result};
-use crate::logic::iff::chunk::Chunks;
+use crate::iff::chunk::Chunks;
 
 use std::io::{Read, Seek, SeekFrom};
 
 use byteorder::LittleEndian;
 
-pub(in crate::logic::iff::wav) fn parse_riff_info<R>(
+pub(in crate::iff::wav) fn parse_riff_info<R>(
 	data: &mut R,
 	end: u64,
 	tag: &mut RiffInfoList,

src/iff/wav/tag/write.rs

@@ -1,14 +1,14 @@
 use super::RiffInfoListRef;
 use crate::error::{LoftyError, Result};
-use crate::logic::iff::chunk::Chunks;
-use crate::logic::iff::wav::read::verify_wav;
+use crate::iff::chunk::Chunks;
+use crate::iff::wav::read::verify_wav;
 
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom, Write};
 
 use byteorder::{LittleEndian, WriteBytesExt};
 
-pub(in crate::logic::iff::wav) fn write_riff_info(
+pub(in crate::iff::wav) fn write_riff_info(
 	data: &mut File,
 	tag: &mut RiffInfoListRef,
 ) -> Result<()> {

src/iff/wav/write.rs

@@ -1,8 +1,8 @@
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2TagRef;
+use crate::id3::v2::tag::Id3v2TagRef;
 #[cfg(feature = "riff_info_list")]
-use crate::logic::iff::wav::tag::RiffInfoListRef;
+use crate::iff::wav::tag::RiffInfoListRef;
 #[allow(unused_imports)]
 use crate::types::tag::{Tag, TagType};
 

src/lib.rs

@@ -150,9 +150,15 @@
 	clippy::single_match_else
 )]
 
+pub mod ape;
 mod error;
-pub(crate) mod logic;
+pub mod id3;
+pub mod iff;
+pub mod mp3;
+pub mod mp4;
+pub mod ogg;
 mod probe;
+pub(crate) mod tag_utils;
 mod types;
 
 pub use crate::error::{LoftyError, Result};
@@ -174,133 +180,3 @@ pub use crate::types::picture::{MimeType, Picture, PictureType};
 pub use crate::types::picture::PictureInformation;
 
 pub use probe::{read_from, read_from_path};
-
-#[cfg(any(feature = "id3v1", feature = "id3v2"))]
-pub mod id3 {
-	//! ID3 specific items
-	//!
-	//! ID3 does things differently than other tags, making working with them a little more effort than other formats.
-	//! Check the other modules for important notes and/or warnings.
-
-	#[cfg(feature = "id3v2")]
-	pub mod v2 {
-		//! ID3v2 items and utilities
-		//!
-		//! ## Important notes
-		//!
-		//! See:
-		//!
-		//! * [Id3v2Tag]
-		//! * [Frame]
-
-		pub use {
-			crate::logic::id3::v2::flags::Id3v2TagFlags,
-			crate::logic::id3::v2::frame::{
-				EncodedTextFrame, Frame, FrameFlags, FrameID, FrameValue, LanguageFrame,
-			},
-			crate::logic::id3::v2::items::encapsulated_object::{
-				GEOBInformation, GeneralEncapsulatedObject,
-			},
-			crate::logic::id3::v2::items::sync_text::{
-				SyncTextContentType, SyncTextInformation, SynchronizedText, TimestampFormat,
-			},
-			crate::logic::id3::v2::tag::Id3v2Tag,
-			crate::logic::id3::v2::util::text_utils::TextEncoding,
-			crate::logic::id3::v2::util::upgrade::{upgrade_v2, upgrade_v3},
-			crate::logic::id3::v2::Id3v2Version,
-		};
-
-		#[cfg(feature = "id3v2_restrictions")]
-		pub use crate::logic::id3::v2::items::restrictions::*;
-	}
-
-	#[cfg(feature = "id3v1")]
-	pub mod v1 {
-		//! ID3v1 items
-		//!
-		//! # ID3v1 notes
-		//!
-		//! See also: [Id3v1Tag]
-		//!
-		//! ## Genres
-		//!
-		//! ID3v1 stores the genre in a single byte ranging from 0 to 192 (inclusive).
-		//! All possible genres have been stored in the [`GENRES`] constant.
-		//!
-		//! ## Track Numbers
-		//!
-		//! ID3v1 stores the track number in a non-zero byte.
-		//! A track number of 0 will be treated as an empty field.
-		//! Additionally, there is no track total field.
-		pub use crate::logic::id3::v1::constants::GENRES;
-		pub use crate::logic::id3::v1::tag::Id3v1Tag;
-	}
-}
-
-pub mod ape {
-	//! APE specific items
-	//!
-	//! ## File notes
-	//!
-	//! It is possible for an `APE` file to contain an `ID3v2` tag. For the sake of data preservation,
-	//! this tag will be read, but **cannot** be written. The only tags allowed by spec are `APEv1/2` and
-	//! `ID3v1`.
-	pub use crate::logic::ape::{properties::ApeProperties, ApeFile};
-	#[cfg(feature = "ape")]
-	pub use crate::{
-		logic::ape::tag::{ape_tag::ApeTag, item::ApeItem},
-		types::picture::APE_PICTURE_TYPES,
-	};
-}
-
-pub mod mp3 {
-	//! MP3 specific items
-	pub use crate::logic::mp3::header::{ChannelMode, Layer, MpegVersion};
-	pub use crate::logic::mp3::{properties::Mp3Properties, Mp3File};
-}
-
-pub mod mp4 {
-	//! MP4 specific items
-	//!
-	//! ## File notes
-	//!
-	//! The only supported tag format is [`Ilst`].
-	#[cfg(feature = "mp4_ilst")]
-	pub use crate::logic::mp4::{
-		ilst::{
-			atom::{Atom, AtomData},
-			Ilst,
-		},
-		AtomIdent,
-	};
-	pub use crate::logic::mp4::{
-		properties::{Mp4Codec, Mp4Properties},
-		Mp4File,
-	};
-}
-
-pub mod ogg {
-	//! OPUS/FLAC/Vorbis specific items
-	//!
-	//! ## File notes
-	//!
-	//! The only supported tag format is [`VorbisComments`]
-	pub use crate::logic::ogg::flac::FlacFile;
-	pub use crate::logic::ogg::opus::{properties::OpusProperties, OpusFile};
-	#[cfg(feature = "vorbis_comments")]
-	pub use crate::logic::ogg::tag::VorbisComments;
-	pub use crate::logic::ogg::vorbis::{properties::VorbisProperties, VorbisFile};
-}
-
-pub mod iff {
-	//! WAV/AIFF specific items
-	pub use crate::logic::iff::aiff::AiffFile;
-	pub use crate::logic::iff::wav::WavFile;
-
-	#[cfg(feature = "aiff_text_chunks")]
-	pub use crate::logic::iff::aiff::tag::AiffTextChunks;
-	#[cfg(feature = "riff_info_list")]
-	pub use crate::logic::iff::wav::tag::RiffInfoList;
-
-	pub use crate::logic::iff::wav::properties::{WavFormat, WavProperties};
-}

src/logic/id3/v1/mod.rs

@@ -1,4 +0,0 @@
-pub(crate) mod constants;
-pub(in crate::logic) mod read;
-pub(crate) mod tag;
-pub(in crate::logic) mod write;

src/logic/id3/v2/items/mod.rs

@@ -1,4 +0,0 @@
-pub(crate) mod encapsulated_object;
-#[cfg(feature = "id3v2_restrictions")]
-pub(crate) mod restrictions;
-pub(crate) mod sync_text;

src/logic/iff/mod.rs

@@ -1,3 +0,0 @@
-pub(crate) mod aiff;
-pub(in crate::logic) mod chunk;
-pub(crate) mod wav;

src/mp3/mod.rs

@@ -1,21 +1,24 @@
+//! MP3 specific items
 mod constants;
 pub(crate) mod header;
-pub(crate) mod properties;
-pub(crate) mod read;
-pub(in crate::logic) mod write;
+mod properties;
+mod read;
+pub(crate) mod write;
+
+pub use header::{ChannelMode, Layer, MpegVersion};
+pub use properties::Mp3Properties;
 
-use crate::error::Result;
 #[cfg(feature = "ape")]
-use crate::logic::ape::tag::ape_tag::ApeTag;
+use crate::ape::tag::ape_tag::ApeTag;
+use crate::error::Result;
 #[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1Tag;
+use crate::id3::v1::tag::Id3v1Tag;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2Tag;
-use crate::logic::tag_methods;
+use crate::id3::v2::tag::Id3v2Tag;
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::{Tag, TagType};
-use properties::Mp3Properties;
 
 use std::io::{Read, Seek};
 

src/mp3/read.rs

@@ -1,16 +1,16 @@
 use super::header::{verify_frame_sync, Header, XingHeader};
 use super::{Mp3File, Mp3Properties};
+#[cfg(feature = "ape")]
+use crate::ape::tag::ape_tag::ApeTag;
+use crate::ape::tag::read_ape_header;
 use crate::error::{LoftyError, Result};
+#[cfg(feature = "id3v1")]
+use crate::id3::v1::tag::Id3v1Tag;
+#[cfg(feature = "id3v2")]
+use crate::id3::v2::read::parse_id3v2;
+use crate::id3::v2::read_id3v2_header;
 #[cfg(feature = "id3v2")]
 use crate::id3::v2::Id3v2Tag;
-#[cfg(feature = "ape")]
-use crate::logic::ape::tag::ape_tag::ApeTag;
-use crate::logic::ape::tag::read_ape_header;
-#[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1Tag;
-#[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::read::parse_id3v2;
-use crate::logic::id3::v2::read_id3v2_header;
 
 use std::io::{Read, Seek, SeekFrom};
 
@@ -85,7 +85,7 @@ where
 
 				#[cfg(feature = "id3v1")]
 				{
-					id3v1_tag = Some(crate::logic::id3::v1::read::parse_id3v1(id3v1_read));
+					id3v1_tag = Some(crate::id3::v1::read::parse_id3v1(id3v1_read));
 				}
 
 				continue;
@@ -105,9 +105,7 @@ where
 
 					#[cfg(feature = "ape")]
 					{
-						ape_tag = Some(crate::logic::ape::tag::read::read_ape_tag(
-							data, ape_header,
-						)?);
+						ape_tag = Some(crate::ape::tag::read::read_ape_tag(data, ape_header)?);
 					}
 
 					continue;

src/mp3/write.rs

@@ -1,10 +1,10 @@
-use crate::error::{LoftyError, Result};
 #[cfg(feature = "ape")]
-use crate::logic::ape::tag::ape_tag::ApeTagRef;
+use crate::ape::tag::ape_tag::ApeTagRef;
+use crate::error::{LoftyError, Result};
 #[cfg(feature = "id3v1")]
-use crate::logic::id3::v1::tag::Id3v1TagRef;
+use crate::id3::v1::tag::Id3v1TagRef;
 #[cfg(feature = "id3v2")]
-use crate::logic::id3::v2::tag::Id3v2TagRef;
+use crate::id3::v2::tag::Id3v2TagRef;
 #[allow(unused_imports)]
 use crate::types::tag::{Tag, TagType};
 

src/mp4/ilst/atom.rs

@@ -1,4 +1,4 @@
-use crate::logic::mp4::AtomIdent;
+use crate::mp4::AtomIdent;
 use crate::types::picture::Picture;
 
 #[derive(Debug, PartialEq, Clone)]

src/mp4/ilst/mod.rs

@@ -1,6 +1,6 @@
-pub(crate) mod atom;
-pub(in crate::logic::mp4) mod read;
-pub(in crate::logic) mod write;
+pub(super) mod atom;
+pub(super) mod read;
+pub(crate) mod write;
 
 use super::AtomIdent;
 use crate::error::Result;
@@ -221,7 +221,7 @@ pub(crate) struct IlstRef<'a> {
 }
 
 impl<'a> IlstRef<'a> {
-	pub(in crate::logic) fn write_to(&mut self, file: &mut File) -> Result<()> {
+	pub(crate) fn write_to(&mut self, file: &mut File) -> Result<()> {
 		write::write_to(file, self)
 	}
 }
@@ -355,7 +355,7 @@ mod tests {
 
 		let tag: Tag = ilst.into();
 
-		crate::logic::test_utils::verify_tag(&tag, false, true);
+		crate::tag_utils::test_utils::verify_tag(&tag, false, true);
 	}
 
 	#[test]
@@ -368,7 +368,7 @@ mod tests {
 			assert_eq!(atom.data(), &data);
 		}
 
-		let tag = crate::logic::test_utils::create_tag(TagType::Mp4Ilst);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::Mp4Ilst);
 
 		let ilst: Ilst = tag.into();
 

src/mp4/ilst/read.rs

@@ -1,8 +1,8 @@
 use super::{Atom, AtomData, AtomIdent, Ilst};
 use crate::error::{LoftyError, Result};
-use crate::logic::id3::v2::util::text_utils::utf16_decode;
-use crate::logic::mp4::atom_info::AtomInfo;
-use crate::logic::mp4::read::skip_unneeded;
+use crate::id3::v2::util::text_utils::utf16_decode;
+use crate::mp4::atom_info::AtomInfo;
+use crate::mp4::read::skip_unneeded;
 use crate::types::picture::{MimeType, Picture, PictureType};
 
 use std::borrow::Cow;

src/mp4/ilst/write.rs

@@ -1,9 +1,9 @@
 use super::{AtomDataRef, IlstRef};
 use crate::error::{LoftyError, Result};
-use crate::logic::mp4::ilst::{AtomIdentRef, AtomRef};
-use crate::logic::mp4::moov::Moov;
-use crate::logic::mp4::read::nested_atom;
-use crate::logic::mp4::read::verify_mp4;
+use crate::mp4::ilst::{AtomIdentRef, AtomRef};
+use crate::mp4::moov::Moov;
+use crate::mp4::read::nested_atom;
+use crate::mp4::read::verify_mp4;
 use crate::types::picture::MimeType;
 use crate::types::picture::Picture;
 
@@ -12,7 +12,7 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 
 use byteorder::{BigEndian, WriteBytesExt};
 
-pub(in crate::logic) fn write_to(data: &mut File, tag: &mut IlstRef) -> Result<()> {
+pub(in crate) fn write_to(data: &mut File, tag: &mut IlstRef) -> Result<()> {
 	verify_mp4(data)?;
 
 	let moov = Moov::find(data)?;

src/mp4/mod.rs

@@ -1,19 +1,29 @@
+//! MP4 specific items
+//!
+//! ## File notes
+//!
+//! The only supported tag format is [`Ilst`].
 mod atom_info;
 #[cfg(feature = "mp4_ilst")]
 pub(crate) mod ilst;
 mod moov;
-pub(crate) mod properties;
+mod properties;
 mod read;
 mod trak;
 
-use crate::logic::tag_methods;
+pub use crate::mp4::properties::{Mp4Codec, Mp4Properties};
+#[cfg(feature = "mp4_ilst")]
+pub use crate::mp4::{
+	atom_info::AtomIdent,
+	ilst::{
+		atom::{Atom, AtomData},
+		Ilst,
+	},
+};
+
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::{FileProperties, Result, TagType};
-#[cfg(feature = "mp4_ilst")]
-pub use atom_info::AtomIdent;
-#[cfg(feature = "mp4_ilst")]
-use ilst::Ilst;
-use properties::Mp4Properties;
 
 use std::io::{Read, Seek};
 

src/mp4/read.rs

@@ -6,7 +6,7 @@ use crate::error::{LoftyError, Result};
 
 use std::io::{Read, Seek, SeekFrom};
 
-pub(in crate::logic::mp4) fn verify_mp4<R>(data: &mut R) -> Result<String>
+pub(in crate::mp4) fn verify_mp4<R>(data: &mut R) -> Result<String>
 where
 	R: Read + Seek,
 {

src/ogg/flac/block.rs

@@ -15,7 +15,7 @@ pub(super) struct Block {
 }
 
 impl Block {
-	pub(in crate::logic::ogg) fn read<R>(data: &mut R) -> Result<Self>
+	pub(in crate::ogg) fn read<R>(data: &mut R) -> Result<Self>
 	where
 		R: Read + Seek,
 	{

src/ogg/flac/mod.rs

@@ -2,12 +2,12 @@ mod block;
 mod properties;
 mod read;
 #[cfg(feature = "vorbis_comments")]
-pub(in crate::logic) mod write;
+pub(crate) mod write;
 
 #[cfg(feature = "vorbis_comments")]
 use super::tag::VorbisComments;
 use crate::error::Result;
-use crate::logic::tag_methods;
+use crate::tag_utils::tag_methods;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::TagType;

src/ogg/flac/read.rs

@@ -2,7 +2,7 @@ use super::block::Block;
 use super::FlacFile;
 use crate::error::{LoftyError, Result};
 #[cfg(feature = "vorbis_comments")]
-use crate::logic::ogg::{read::read_comments, tag::VorbisComments};
+use crate::ogg::{read::read_comments, tag::VorbisComments};
 #[cfg(feature = "vorbis_comments")]
 use crate::types::picture::Picture;
 use crate::types::properties::FileProperties;

src/ogg/flac/write.rs

@@ -1,8 +1,8 @@
 use super::block::Block;
 use super::read::verify_flac;
 use crate::error::{LoftyError, Result};
-use crate::logic::ogg::tag::VorbisCommentsRef;
-use crate::logic::ogg::write::create_comments;
+use crate::ogg::tag::VorbisCommentsRef;
+use crate::ogg::write::create_comments;
 use crate::types::picture::{Picture, PictureInformation};
 
 use std::fs::File;
@@ -10,7 +10,7 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 
 use byteorder::{LittleEndian, WriteBytesExt};
 
-pub(in crate::logic) fn write_to(data: &mut File, tag: &mut VorbisCommentsRef) -> Result<()> {
+pub(in crate) fn write_to(data: &mut File, tag: &mut VorbisCommentsRef) -> Result<()> {
 	let stream_info = verify_flac(data)?;
 	let stream_info_end = stream_info.end as usize;
 

src/ogg/mod.rs

@@ -1,13 +1,23 @@
+//! OPUS/FLAC/Vorbis specific items
+//!
+//! ## File notes
+//!
+//! The only supported tag format is [`VorbisComments`]
 pub(crate) mod constants;
-pub(crate) mod read;
-#[cfg(feature = "vorbis_comments")]
-pub(crate) mod write;
-
 pub(crate) mod flac;
 pub(crate) mod opus;
+pub(crate) mod read;
 #[cfg(feature = "vorbis_comments")]
 pub(crate) mod tag;
 pub(crate) mod vorbis;
+#[cfg(feature = "vorbis_comments")]
+pub(crate) mod write;
+
+pub use crate::ogg::flac::FlacFile;
+pub use crate::ogg::opus::{properties::OpusProperties, OpusFile};
+#[cfg(feature = "vorbis_comments")]
+pub use crate::ogg::tag::VorbisComments;
+pub use crate::ogg::vorbis::{properties::VorbisProperties, VorbisFile};
 
 use crate::{LoftyError, Result};
 
@@ -16,7 +26,7 @@ use std::io::{Read, Seek};
 use ogg_pager::Page;
 
 #[cfg(feature = "vorbis_comments")]
-pub fn page_from_packet(packet: &mut [u8]) -> Result<Vec<Page>> {
+pub(self) fn page_from_packet(packet: &mut [u8]) -> Result<Vec<Page>> {
 	let mut pages: Vec<Page> = Vec::new();
 
 	let reader = &mut &packet[..];

src/ogg/opus/mod.rs

@@ -1,4 +1,4 @@
-pub(crate) mod properties;
+pub(super) mod properties;
 #[cfg(feature = "vorbis_comments")]
 pub(super) mod write;
 
@@ -6,7 +6,7 @@ use super::find_last_page;
 #[cfg(feature = "vorbis_comments")]
 use super::tag::VorbisComments;
 use crate::error::Result;
-use crate::logic::ogg::constants::{OPUSHEAD, OPUSTAGS};
+use crate::ogg::constants::{OPUSHEAD, OPUSTAGS};
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::TagType;

src/ogg/opus/properties.rs

@@ -82,10 +82,7 @@ impl OpusProperties {
 	}
 }
 
-pub(in crate::logic::ogg) fn read_properties<R>(
-	data: &mut R,
-	first_page: &Page,
-) -> Result<OpusProperties>
+pub(in crate::ogg) fn read_properties<R>(data: &mut R, first_page: &Page) -> Result<OpusProperties>
 where
 	R: Read + Seek,
 {

src/ogg/opus/write.rs

@@ -5,7 +5,7 @@ use std::io::{Read, Seek, SeekFrom, Write};
 
 use ogg_pager::Page;
 
-pub(in crate::logic) fn write_to(
+pub(crate) fn write_to(
 	data: &mut File,
 	writer: &mut Vec<u8>,
 	ser: u32,

src/ogg/tag.rs

@@ -1,5 +1,5 @@
 use crate::error::{LoftyError, Result};
-use crate::logic::ogg::constants::{OPUSHEAD, VORBIS_IDENT_HEAD};
+use crate::ogg::constants::{OPUSHEAD, VORBIS_IDENT_HEAD};
 use crate::probe::Probe;
 use crate::types::file::FileType;
 use crate::types::item::{ItemKey, ItemValue, TagItem};
@@ -253,7 +253,7 @@ mod tests {
 		let mut reader = std::io::Cursor::new(&tag[..]);
 		let mut parsed_tag = VorbisComments::default();
 
-		crate::logic::ogg::read::read_comments(&mut reader, &mut parsed_tag).unwrap();
+		crate::ogg::read::read_comments(&mut reader, &mut parsed_tag).unwrap();
 
 		assert_eq!(expected_tag, parsed_tag);
 	}
@@ -269,16 +269,16 @@ mod tests {
 		let mut reader = std::io::Cursor::new(&tag_bytes[..]);
 		let mut vorbis_comments = VorbisComments::default();
 
-		crate::logic::ogg::read::read_comments(&mut reader, &mut vorbis_comments).unwrap();
+		crate::ogg::read::read_comments(&mut reader, &mut vorbis_comments).unwrap();
 
 		let tag: Tag = vorbis_comments.into();
 
-		crate::logic::test_utils::verify_tag(&tag, true, true);
+		crate::tag_utils::test_utils::verify_tag(&tag, true, true);
 	}
 
 	#[test]
 	fn tag_to_vorbis_comments() {
-		let tag = crate::logic::test_utils::create_tag(TagType::VorbisComments);
+		let tag = crate::tag_utils::test_utils::create_tag(TagType::VorbisComments);
 
 		let vorbis_comments: VorbisComments = tag.into();
 

src/ogg/vorbis/mod.rs

@@ -1,12 +1,12 @@
-pub(crate) mod properties;
+pub(super) mod properties;
 #[cfg(feature = "vorbis_comments")]
-pub(in crate::logic::ogg) mod write;
+pub(in crate::ogg) mod write;
 
 use super::find_last_page;
 #[cfg(feature = "vorbis_comments")]
 use super::tag::VorbisComments;
 use crate::error::Result;
-use crate::logic::ogg::constants::{VORBIS_COMMENT_HEAD, VORBIS_IDENT_HEAD};
+use crate::ogg::constants::{VORBIS_COMMENT_HEAD, VORBIS_IDENT_HEAD};
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 use crate::types::properties::FileProperties;
 use crate::types::tag::TagType;

src/ogg/vorbis/properties.rs

@@ -106,7 +106,7 @@ impl VorbisProperties {
 	}
 }
 
-pub(in crate::logic::ogg) fn read_properties<R>(
+pub(in crate::ogg) fn read_properties<R>(
 	data: &mut R,
 	first_page: &Page,
 ) -> Result<VorbisProperties>

src/ogg/vorbis/write.rs

@@ -1,5 +1,5 @@
 use crate::error::{LoftyError, Result};
-use crate::logic::ogg::constants::VORBIS_SETUP_HEAD;
+use crate::ogg::constants::VORBIS_SETUP_HEAD;
 
 use std::fs::File;
 use std::io::{Cursor, Read, Seek, SeekFrom, Write};
@@ -7,7 +7,7 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 use byteorder::{LittleEndian, ReadBytesExt};
 use ogg_pager::Page;
 
-pub(in crate::logic) fn write_to(
+pub(crate) fn write_to(
 	data: &mut File,
 	writer: &mut Vec<u8>,
 	first_md_content: Vec<u8>,

src/ogg/write.rs

@@ -1,8 +1,8 @@
 use super::{page_from_packet, verify_signature};
 use crate::error::{LoftyError, Result};
-use crate::logic::ogg::constants::OPUSTAGS;
-use crate::logic::ogg::constants::VORBIS_COMMENT_HEAD;
-use crate::logic::ogg::tag::VorbisCommentsRef;
+use crate::ogg::constants::OPUSTAGS;
+use crate::ogg::constants::VORBIS_COMMENT_HEAD;
+use crate::ogg::tag::VorbisCommentsRef;
 use crate::types::picture::PictureInformation;
 use crate::types::tag::{Tag, TagType};
 
@@ -13,8 +13,9 @@ use std::io::{Cursor, Read, Seek, SeekFrom, Write};
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 use ogg_pager::Page;
 
-pub(in crate::logic) fn write_to(data: &mut File, tag: &Tag, sig: &[u8]) -> Result<()> {
+pub(in crate) fn write_to(data: &mut File, tag: &Tag, sig: &[u8]) -> Result<()> {
 	match tag.tag_type() {
+		#[cfg(feature = "vorbis_comments")]
 		TagType::VorbisComments => write(data, &mut Into::<VorbisCommentsRef>::into(tag), sig),
 		_ => Err(LoftyError::UnsupportedTag),
 	}

src/probe.rs

@@ -1,13 +1,13 @@
+use crate::ape::ApeFile;
 use crate::error::{LoftyError, Result};
-use crate::logic::ape::ApeFile;
-use crate::logic::iff::aiff::AiffFile;
-use crate::logic::iff::wav::WavFile;
-use crate::logic::mp3::header::verify_frame_sync;
-use crate::logic::mp3::Mp3File;
-use crate::logic::mp4::Mp4File;
-use crate::logic::ogg::flac::FlacFile;
-use crate::logic::ogg::opus::OpusFile;
-use crate::logic::ogg::vorbis::VorbisFile;
+use crate::iff::aiff::AiffFile;
+use crate::iff::wav::WavFile;
+use crate::mp3::header::verify_frame_sync;
+use crate::mp3::Mp3File;
+use crate::mp4::Mp4File;
+use crate::ogg::flac::FlacFile;
+use crate::ogg::opus::OpusFile;
+use crate::ogg::vorbis::VorbisFile;
 use crate::types::file::{AudioFile, FileType, TaggedFile};
 
 use std::fs::File;

src/tag_utils.rs

@@ -1,48 +1,45 @@
-pub(crate) mod ape;
-pub(crate) mod id3;
-pub(crate) mod iff;
-pub(crate) mod mp3;
-pub(crate) mod mp4;
-pub(crate) mod ogg;
-
 use crate::error::{LoftyError, Result};
-use crate::types::file::FileType;
-use crate::types::tag::Tag;
 #[cfg(feature = "mp4_ilst")]
-use mp4::ilst::IlstRef;
+use crate::mp4::ilst::IlstRef;
 #[cfg(feature = "vorbis_comments")]
-use ogg::{
+use crate::ogg::{
 	constants::{OPUSTAGS, VORBIS_COMMENT_HEAD},
 	tag::VorbisCommentsRef,
 };
+use crate::types::file::FileType;
+use crate::types::tag::Tag;
 
 use std::fs::File;
 
 #[allow(unreachable_patterns)]
 pub(crate) fn write_tag(tag: &Tag, file: &mut File, file_type: FileType) -> Result<()> {
 	match file_type {
-		FileType::AIFF => iff::aiff::write::write_to(file, tag),
-		FileType::APE => ape::write::write_to(file, tag),
+		FileType::AIFF => crate::iff::aiff::write::write_to(file, tag),
+		FileType::APE => crate::ape::write::write_to(file, tag),
 		#[cfg(feature = "vorbis_comments")]
-		FileType::FLAC => ogg::flac::write::write_to(file, &mut Into::<VorbisCommentsRef>::into(tag)),
-		FileType::MP3 => mp3::write::write_to(file, tag),
+		FileType::FLAC => {
+			crate::ogg::flac::write::write_to(file, &mut Into::<VorbisCommentsRef>::into(tag))
+		},
+		FileType::MP3 => crate::mp3::write::write_to(file, tag),
 		#[cfg(feature = "mp4_ilst")]
-		FileType::MP4 => mp4::ilst::write::write_to(file, &mut Into::<IlstRef>::into(tag)),
+		FileType::MP4 => crate::mp4::ilst::write::write_to(file, &mut Into::<IlstRef>::into(tag)),
 		#[cfg(feature = "vorbis_comments")]
-		FileType::Opus => ogg::write::write_to(file, tag, OPUSTAGS),
+		FileType::Opus => crate::ogg::write::write_to(file, tag, OPUSTAGS),
 		#[cfg(feature = "vorbis_comments")]
-		FileType::Vorbis => ogg::write::write_to(file, tag, VORBIS_COMMENT_HEAD),
-		FileType::WAV => iff::wav::write::write_to(file, tag),
+		FileType::Vorbis => crate::ogg::write::write_to(file, tag, VORBIS_COMMENT_HEAD),
+		FileType::WAV => crate::iff::wav::write::write_to(file, tag),
 		_ => Err(LoftyError::UnsupportedTag),
 	}
 }
 
 macro_rules! tag_methods {
-	($(
+	(
+		$(
 			$(#[$attr:meta])?;
 			$display_name:tt,
 			$name:ident,
-	$ty:ty);*
+			$ty:ty
+		);*
 	) => {
 		paste::paste! {
 			$(
@@ -68,11 +65,11 @@ macro_rules! tag_methods {
 	}
 }
 
-pub(in crate::logic) use tag_methods;
+pub(crate) use tag_methods;
 
 #[cfg(test)]
 // Used for tag conversion tests
-mod test_utils {
+pub(crate) mod test_utils {
 	use crate::{ItemKey, Tag, TagType};
 
 	pub(crate) fn create_tag(tag_type: TagType) -> Tag {

src/types/file.rs

@@ -283,7 +283,7 @@ impl FileType {
 	}
 
 	pub(crate) fn from_buffer_inner(buf: &[u8]) -> Result<(Option<Self>, u32)> {
-		use crate::logic::id3::v2::unsynch_u32;
+		use crate::id3::v2::unsynch_u32;
 
 		if buf.is_empty() {
 			return Err(LoftyError::EmptyFile);
@@ -306,7 +306,7 @@ impl FileType {
 	}
 
 	fn quick_type_guess(buf: &[u8]) -> Option<Self> {
-		use crate::logic::mp3::header::verify_frame_sync;
+		use crate::mp3::header::verify_frame_sync;
 
 		match buf.first().unwrap() {
 			77 if buf.starts_with(b"MAC") => Some(Self::APE),

src/types/item.rs

@@ -610,7 +610,7 @@ impl TagItem {
 	pub(crate) fn re_map(&self, tag_type: TagType) -> Option<()> {
 		#[cfg(feature = "id3v1")]
 		if tag_type == TagType::Id3v1 {
-			use crate::logic::id3::v1::constants::VALID_ITEMKEYS;
+			use crate::id3::v1::constants::VALID_ITEMKEYS;
 
 			return VALID_ITEMKEYS.contains(&self.item_key).then(|| ());
 		}

src/types/picture.rs

@@ -1,6 +1,6 @@
 use crate::{LoftyError, Result};
 #[cfg(feature = "id3v2")]
-use {crate::logic::id3::v2::util::text_utils::TextEncoding, crate::logic::id3::v2::Id3v2Version};
+use {crate::id3::v2::util::text_utils::TextEncoding, crate::id3::v2::Id3v2Version};
 
 use std::borrow::Cow;
 #[cfg(any(feature = "vorbis_comments", feature = "ape", feature = "id3v2"))]
@@ -587,13 +587,9 @@ impl Picture {
 		data.write_u8(self.pic_type.as_u8())?;
 
 		match &self.description {
-			Some(description) => {
-				data.write_all(&*crate::logic::id3::v2::util::text_utils::encode_text(
-					description,
-					text_encoding,
-					true,
-				))?
-			},
+			Some(description) => data.write_all(
+				&*crate::id3::v2::util::text_utils::encode_text(description, text_encoding, true),
+			)?,
 			None => data.write_u8(0)?,
 		}
 
@@ -643,18 +639,14 @@ impl Picture {
 				},
 			}
 		} else {
-			(crate::logic::id3::v2::util::text_utils::decode_text(
-				&mut cursor,
-				TextEncoding::UTF8,
-				true,
-			)?)
+			(crate::id3::v2::util::text_utils::decode_text(&mut cursor, TextEncoding::UTF8, true)?)
 				.map_or(MimeType::None, |mime_type| MimeType::from_str(&*mime_type))
 		};
 
 		let picture_type = PictureType::from_u8(cursor.read_u8()?);
 
 		let description =
-			crate::logic::id3::v2::util::text_utils::decode_text(&mut cursor, encoding, true)?
+			crate::id3::v2::util::text_utils::decode_text(&mut cursor, encoding, true)?
 				.map(Cow::from);
 
 		let mut data = Vec::new();

src/types/tag.rs

@@ -289,7 +289,7 @@ impl Tag {
 		match probe.file_type() {
 			Some(file_type) => {
 				if file_type.supports_tag_type(self.tag_type()) {
-					crate::logic::write_tag(self, probe.into_inner(), file_type)
+					crate::tag_utils::write_tag(self, probe.into_inner(), file_type)
 				} else {
 					Err(LoftyError::UnsupportedTag)
 				}
@@ -354,7 +354,7 @@ impl TagType {
 				if file_type.supports_tag_type(self) {
 					let file = probe.into_inner();
 
-					return crate::logic::write_tag(&Tag::new(*self), file, file_type).is_ok();
+					return crate::tag_utils::write_tag(&Tag::new(*self), file, file_type).is_ok();
 				}
 			}
 		}