ericonr
/
sndio
mirror of https://github.com/ericonr/sndio.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Don't send MIDI flow control messages too often.

This commit is contained in:
Alexandre Ratchov 2019-03-28 08:13:23 +01:00
parent 2c97522b5a
commit c75f08ec81
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sndiod/midi.c
View File

@ -239,6 +239,16 @@ midi_tickets(struct midi *iep)
int i, tickets, avail, maxavail;
struct midi *oep;
/*
* don't request iep->ops->fill() too often as it generates
* useless network traffic: wait until we reach half of the
* max tickets count. As in the worst case (see comment below)
* one ticket may consume two bytes, the max ticket count is
* BUFSZ / 2 and halt of it is simply BUFSZ / 4.
*/
if (iep->tickets >= MIDI_BUFSZ / 4)
return;
maxavail = MIDI_BUFSZ;
for (i = 0; i < MIDI_NEP ; i++) {
if ((iep->txmask & (1 << i)) == 0)