Mercurial > sdl-ios-xcode
annotate docs/html/sdlcdclose.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 | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_CDClose</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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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="CD-ROM" | |
| 14 HREF="cdrom.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CDEject" | |
| 17 HREF="sdlcdeject.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CD" | |
| 20 HREF="sdlcd.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 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="sdlcdeject.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="sdlcd.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLCDCLOSE" | |
| 71 >SDL_CDClose</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN7153" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_CDClose -- Closes a SDL_CD handle</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN7156" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN7157" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >void <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_CDClose</B | |
| 105 ></CODE | |
| 106 >(SDL_CD *cdrom);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN7163" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Closes the given <TT | |
| 121 CLASS="PARAMETER" | |
| 122 ><I | |
| 123 >cdrom</I | |
| 124 ></TT | |
| 125 > handle.</P | |
| 126 ></DIV | |
| 127 ><DIV | |
| 128 CLASS="REFSECT1" | |
| 129 ><A | |
|
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130 NAME="AEN7167" |
| 0 | 131 ></A |
| 132 ><H2 | |
| 133 >See Also</H2 | |
| 134 ><P | |
| 135 ><A | |
| 136 HREF="sdlcdopen.html" | |
| 137 ><TT | |
| 138 CLASS="FUNCTION" | |
| 139 >SDL_CDOpen</TT | |
| 140 ></A | |
| 141 >, | |
| 142 <A | |
| 143 HREF="sdlcd.html" | |
| 144 ><SPAN | |
| 145 CLASS="STRUCTNAME" | |
| 146 >SDL_CD</SPAN | |
| 147 ></A | |
| 148 ></P | |
| 149 ></DIV | |
| 150 ><DIV | |
| 151 CLASS="NAVFOOTER" | |
| 152 ><HR | |
| 153 ALIGN="LEFT" | |
| 154 WIDTH="100%"><TABLE | |
| 155 WIDTH="100%" | |
| 156 BORDER="0" | |
| 157 CELLPADDING="0" | |
| 158 CELLSPACING="0" | |
| 159 ><TR | |
| 160 ><TD | |
| 161 WIDTH="33%" | |
| 162 ALIGN="left" | |
| 163 VALIGN="top" | |
| 164 ><A | |
| 165 HREF="sdlcdeject.html" | |
| 166 >Prev</A | |
| 167 ></TD | |
| 168 ><TD | |
| 169 WIDTH="34%" | |
| 170 ALIGN="center" | |
| 171 VALIGN="top" | |
| 172 ><A | |
| 173 HREF="index.html" | |
| 174 >Home</A | |
| 175 ></TD | |
| 176 ><TD | |
| 177 WIDTH="33%" | |
| 178 ALIGN="right" | |
| 179 VALIGN="top" | |
| 180 ><A | |
| 181 HREF="sdlcd.html" | |
| 182 >Next</A | |
| 183 ></TD | |
| 184 ></TR | |
| 185 ><TR | |
| 186 ><TD | |
| 187 WIDTH="33%" | |
| 188 ALIGN="left" | |
| 189 VALIGN="top" | |
| 190 >SDL_CDEject</TD | |
| 191 ><TD | |
| 192 WIDTH="34%" | |
| 193 ALIGN="center" | |
| 194 VALIGN="top" | |
| 195 ><A | |
| 196 HREF="cdrom.html" | |
| 197 >Up</A | |
| 198 ></TD | |
| 199 ><TD | |
| 200 WIDTH="33%" | |
| 201 ALIGN="right" | |
| 202 VALIGN="top" | |
| 203 >SDL_CD</TD | |
| 204 ></TR | |
| 205 ></TABLE | |
| 206 ></DIV | |
| 207 ></BODY | |
| 208 ></HTML | |
| 209 > |