From 4d49f1459a23ec9c75acfbe84ab58aa52b6a50df Mon Sep 17 00:00:00 2001
From: Oliver Rockstedt <info@sourcebox.de>
Date: Sun, 26 May 2024 00:09:56 +0200
Subject: [PATCH] Extended endpoint descriptors to 9 bytes

---
 CHANGELOG.md       |  1 +
 src/midi_device.rs | 17 +++++++++++++----
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7020ff1..8a99d03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Updated `usb-device` dependency to 0.3.2.
 - Updated `num_enum` dependency to 0.7.2.
+- Extended endpoint descriptors to 9 bytes as stated in specification.
 
 ### Removed
 
diff --git a/src/midi_device.rs b/src/midi_device.rs
index 9e0ba73..cf35647 100644
--- a/src/midi_device.rs
+++ b/src/midi_device.rs
@@ -123,9 +123,9 @@ impl<B: UsbBus> UsbClass<B> for MidiClass<'_, B> {
         let midi_streaming_total_length = 7
             + (self.n_in_jacks + self.n_out_jacks) as usize
                 * (MIDI_IN_SIZE + MIDI_OUT_SIZE) as usize
-            + 7
+            + 9
             + (4 + self.n_out_jacks as usize)
-            + 7
+            + 9
             + (4 + self.n_in_jacks as usize);
 
         //Streaming extra info
@@ -206,7 +206,11 @@ impl<B: UsbBus> UsbClass<B> for MidiClass<'_, B> {
             0, // jack mappings. must be filled in and cropped.
         ];
 
-        writer.endpoint(&self.standard_bulkout)?; // len = 7
+        writer.endpoint_ex(&self.standard_bulkout, |data| {
+            data[0] = 0; // bRefresh
+            data[1] = 0; // bSynchAddress
+            Ok(2)
+        })?; // len = 9
 
         endpoint_data[1] = self.n_out_jacks;
         for i in 0..self.n_out_jacks {
@@ -218,7 +222,12 @@ impl<B: UsbBus> UsbClass<B> for MidiClass<'_, B> {
             &endpoint_data[0..2 + self.n_out_jacks as usize],
         )?;
 
-        writer.endpoint(&self.standard_bulkin)?; // len = 7
+        writer.endpoint_ex(&self.standard_bulkin, |data| {
+            data[0] = 0; // bRefresh
+            data[1] = 0; // bSynchAddress
+            Ok(2)
+        })?; // len = 9
+
         endpoint_data[1] = self.n_in_jacks;
         for i in 0..self.n_in_jacks {
             endpoint_data[2 + i as usize] = self.out_jack_id_emb(i);