From: Clemens Ladisch <clemens@ladisch.de>
Date: Mon, 17 Aug 2009 10:29:11 +0000 (+0200)
Subject: aplaymidi: reduce bandwidth for big SysEx messages
X-Git-Tag: v1.0.21~2
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=d94ab95c0df7389f586c1550c4532a54b21c34f6;p=alsa-utils.git

aplaymidi: reduce bandwidth for big SysEx messages

When throttling the data rate for big SysEx messages, use the bandwidth
that devices use in practice instead of the theoretical maximum.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
---

diff --git a/seq/aplaymidi/aplaymidi.c b/seq/aplaymidi/aplaymidi.c
index 5ed7bab..ad508b3 100644
--- a/seq/aplaymidi/aplaymidi.c
+++ b/seq/aplaymidi/aplaymidi.c
@@ -31,7 +31,12 @@
 #include "aconfig.h"
 #include "version.h"
 
-#define MIDI_BYTES_PER_SEC 3125
+/*
+ * 31.25 kbaud, one start bit, eight data bits, two stop bits.
+ * (The MIDI spec says one stop bit, but every transmitter uses two, just to be
+ * sure, so we better not exceed that to avoid overflowing the output buffer.)
+ */
+#define MIDI_BYTES_PER_SEC (31250 / (1 + 8 + 2))
 
 /*
  * A MIDI event after being parsed/loaded from the file.