Mercurial > sdl-ios-xcode
annotate docs/html/guidepreface.html @ 765:4c2ba6161939
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 | 55f1f1b3e27d |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Preface</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="SDL Guide" | |
| 14 HREF="guide.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL Guide" | |
| 17 HREF="guide.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="About SDLdoc" | |
| 20 HREF="guideaboutsdldoc.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="PREFACE" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="guide.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="guideaboutsdldoc.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><DIV | |
| 69 CLASS="PREFACE" | |
| 70 ><H1 | |
| 71 ><A | |
| 72 NAME="GUIDEPREFACE" | |
| 73 >Preface</A | |
| 74 ></H1 | |
| 75 ><DIV | |
| 76 CLASS="TOC" | |
| 77 ><DL | |
| 78 ><DT | |
| 79 ><B | |
| 80 >Table of Contents</B | |
| 81 ></DT | |
| 82 ><DT | |
| 83 ><A | |
| 84 HREF="guidepreface.html#GUIDEABOUTSDL" | |
| 85 >About SDL</A | |
| 86 ></DT | |
| 87 ><DT | |
| 88 ><A | |
| 89 HREF="guideaboutsdldoc.html" | |
| 90 >About SDLdoc</A | |
| 91 ></DT | |
| 92 ><DT | |
| 93 ><A | |
| 94 HREF="guidecredits.html" | |
| 95 >Credits</A | |
| 96 ></DT | |
| 97 ></DL | |
| 98 ></DIV | |
| 99 ><DIV | |
| 100 CLASS="SECT1" | |
| 101 ><H1 | |
| 102 CLASS="SECT1" | |
| 103 ><A | |
| 104 NAME="GUIDEABOUTSDL" | |
| 105 >About SDL</A | |
| 106 ></H1 | |
| 107 ><P | |
| 108 >The SDL library is designed to make it easy to write games that run on Linux, *BSD, MacOS, Win32 and BeOS using the various native high-performance media interfaces, (for video, audio, etc) and presenting a single source-code level API to your application. SDL is a fairly low level API, but using it, completely portable applications can be written with a great deal of flexibility.</P | |
| 109 ></DIV | |
| 110 ></DIV | |
| 111 ><DIV | |
| 112 CLASS="NAVFOOTER" | |
| 113 ><HR | |
| 114 ALIGN="LEFT" | |
| 115 WIDTH="100%"><TABLE | |
| 116 WIDTH="100%" | |
| 117 BORDER="0" | |
| 118 CELLPADDING="0" | |
| 119 CELLSPACING="0" | |
| 120 ><TR | |
| 121 ><TD | |
| 122 WIDTH="33%" | |
| 123 ALIGN="left" | |
| 124 VALIGN="top" | |
| 125 ><A | |
| 126 HREF="guide.html" | |
| 127 >Prev</A | |
| 128 ></TD | |
| 129 ><TD | |
| 130 WIDTH="34%" | |
| 131 ALIGN="center" | |
| 132 VALIGN="top" | |
| 133 ><A | |
| 134 HREF="index.html" | |
| 135 >Home</A | |
| 136 ></TD | |
| 137 ><TD | |
| 138 WIDTH="33%" | |
| 139 ALIGN="right" | |
| 140 VALIGN="top" | |
| 141 ><A | |
| 142 HREF="guideaboutsdldoc.html" | |
| 143 >Next</A | |
| 144 ></TD | |
| 145 ></TR | |
| 146 ><TR | |
| 147 ><TD | |
| 148 WIDTH="33%" | |
| 149 ALIGN="left" | |
| 150 VALIGN="top" | |
| 151 >SDL Guide</TD | |
| 152 ><TD | |
| 153 WIDTH="34%" | |
| 154 ALIGN="center" | |
| 155 VALIGN="top" | |
| 156 ><A | |
| 157 HREF="guide.html" | |
| 158 >Up</A | |
| 159 ></TD | |
| 160 ><TD | |
| 161 WIDTH="33%" | |
| 162 ALIGN="right" | |
| 163 VALIGN="top" | |
| 164 >About SDLdoc</TD | |
| 165 ></TR | |
| 166 ></TABLE | |
| 167 ></DIV | |
| 168 ></BODY | |
| 169 ></HTML | |
| 170 > |