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Editors Note: The original patch was modified to use SDL_Delay() instead of nanosleep because nanosleep may not be portable to all systems using SDL with the ALSA backend. This may be a moot point with the switch to blocking writes anyway... Date: Sat, 27 Dec 2003 21:47:36 +0100 From: Michel Daenzer To: Debian Bug Tracking System Subject: [SDL] Bug#225252: [PATCH] ALSA fixes Package: libsdl1.2debian-all Version: 1.2.6-2 Severity: normal Tags: patch For SDL 1.2.6, the ALSA backend was changed to call snd_pcm_open() with SND_PCM_NONBLOCK. That's a good idea per se, however, it causes high CPU usage, interrupted sound and stuttering in some games here. Taking a nanosleep whenever snd_pcm_writei() returns -EAGAIN fixes this, but I think it's more efficient to use blocking mode for the actual sound playback. Feedback from the SDL and ALSA lists appreciated. The patch also fixes the default ALSA device to be used.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2004 15:40:50 +0000
parents e5bc29de3f0a
children 546f7c1eb755
line wrap: on
line source

.TH "SDL_JoystickEventState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_JoystickEventState\- Enable/disable joystick event polling
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBint \fBSDL_JoystickEventState\fP\fR(\fBint state\fR);
.SH "DESCRIPTION"
.PP
This function is used to enable or disable joystick event processing\&. With joystick event processing disabled you will have to update joystick states with \fI\fBSDL_JoystickUpdate\fP\fR and read the joystick information manually\&. \fBstate\fR is either \fBSDL_QUERY\fP, \fBSDL_ENABLE\fP or \fBSDL_IGNORE\fP\&.
.PP
.RS
\fBNote:  
.PP
Joystick event handling is prefered
.RE
.SH "RETURN VALUE"
.PP
If \fBstate\fR is \fBSDL_QUERY\fP then the current state is returned, otherwise the new processing \fBstate\fR is returned\&.
.SH "SEE ALSO"
.PP
\fISDL Joystick Functions\fR, \fI\fBSDL_JoystickUpdate\fP\fR, \fI\fBSDL_JoyAxisEvent\fR\fR, \fI\fBSDL_JoyBallEvent\fR\fR, \fI\fBSDL_JoyButtonEvent\fR\fR, \fI\fBSDL_JoyHatEvent\fR\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59