Moved descriptor constants into class module

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Renamed `UsbMidiEventPacket::from_midi` function to `UsbMidiEventPacket::from_message`.
 - Renamed `MidiClass::send_message` function to `MidiClass::send_packet`.
+- Moved usb descriptor constants into class module and made them private.
 
 ### Removed
 

src/data/mod.rs

@@ -2,5 +2,4 @@
 
 pub mod byte;
 pub mod midi;
-pub mod usb;
 pub mod usb_midi;

src/midi_device.rs

@@ -1,10 +1,23 @@
 //! Contains the class implementation.
 
-use crate::data::usb::constants::*;
 use crate::data::usb_midi::usb_midi_event_packet::{MidiPacketParsingError, UsbMidiEventPacket};
 use usb_device::class_prelude::*;
 use usb_device::Result;
 
+// Constants for use in descriptors.
+const USB_AUDIO_CLASS: u8 = 0x01;
+const USB_AUDIOCONTROL_SUBCLASS: u8 = 0x01;
+const USB_MIDISTREAMING_SUBCLASS: u8 = 0x03;
+const MIDI_IN_JACK_SUBTYPE: u8 = 0x02;
+const MIDI_OUT_JACK_SUBTYPE: u8 = 0x03;
+const EMBEDDED: u8 = 0x01;
+const EXTERNAL: u8 = 0x02;
+const CS_INTERFACE: u8 = 0x24;
+const CS_ENDPOINT: u8 = 0x25;
+const HEADER_SUBTYPE: u8 = 0x01;
+const MS_HEADER_SUBTYPE: u8 = 0x01;
+const MS_GENERAL: u8 = 0x01;
+
 const MIDI_IN_SIZE: u8 = 0x06;
 const MIDI_OUT_SIZE: u8 = 0x09;