Mercurial > sdl-ios-xcode
annotate docs/html/sdlcdstop.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_CDStop</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_CDResume" | |
| 17 HREF="sdlcdresume.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CDEject" | |
| 20 HREF="sdlcdeject.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="sdlcdresume.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="sdlcdeject.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="SDLCDSTOP" | |
| 71 >SDL_CDStop</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN7097" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_CDStop -- Stops a CDROM</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
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84 NAME="AEN7100" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN7101" |
| 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 >int <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_CDStop</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="AEN7107" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Stops play on the given <TT | |
| 121 CLASS="PARAMETER" | |
| 122 ><I | |
| 123 >cdrom</I | |
| 124 ></TT | |
| 125 >.</P | |
| 126 ></DIV | |
| 127 ><DIV | |
| 128 CLASS="REFSECT1" | |
| 129 ><A | |
|
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130 NAME="AEN7111" |
| 0 | 131 ></A |
| 132 ><H2 | |
| 133 >Return Value</H2 | |
| 134 ><P | |
| 135 >Returns <SPAN | |
| 136 CLASS="RETURNVALUE" | |
| 137 >0</SPAN | |
| 138 > on success, or <SPAN | |
| 139 CLASS="RETURNVALUE" | |
| 140 >-1</SPAN | |
| 141 > on an error.</P | |
| 142 ></DIV | |
| 143 ><DIV | |
| 144 CLASS="REFSECT1" | |
| 145 ><A | |
|
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146 NAME="AEN7116" |
| 0 | 147 ></A |
| 148 ><H2 | |
| 149 >See Also</H2 | |
| 150 ><P | |
| 151 ><A | |
| 152 HREF="sdlcdplay.html" | |
| 153 ><TT | |
| 154 CLASS="FUNCTION" | |
| 155 >SDL_CDPlay</TT | |
| 156 ></A | |
| 157 >,</P | |
| 158 ></DIV | |
| 159 ><DIV | |
| 160 CLASS="NAVFOOTER" | |
| 161 ><HR | |
| 162 ALIGN="LEFT" | |
| 163 WIDTH="100%"><TABLE | |
| 164 WIDTH="100%" | |
| 165 BORDER="0" | |
| 166 CELLPADDING="0" | |
| 167 CELLSPACING="0" | |
| 168 ><TR | |
| 169 ><TD | |
| 170 WIDTH="33%" | |
| 171 ALIGN="left" | |
| 172 VALIGN="top" | |
| 173 ><A | |
| 174 HREF="sdlcdresume.html" | |
| 175 >Prev</A | |
| 176 ></TD | |
| 177 ><TD | |
| 178 WIDTH="34%" | |
| 179 ALIGN="center" | |
| 180 VALIGN="top" | |
| 181 ><A | |
| 182 HREF="index.html" | |
| 183 >Home</A | |
| 184 ></TD | |
| 185 ><TD | |
| 186 WIDTH="33%" | |
| 187 ALIGN="right" | |
| 188 VALIGN="top" | |
| 189 ><A | |
| 190 HREF="sdlcdeject.html" | |
| 191 >Next</A | |
| 192 ></TD | |
| 193 ></TR | |
| 194 ><TR | |
| 195 ><TD | |
| 196 WIDTH="33%" | |
| 197 ALIGN="left" | |
| 198 VALIGN="top" | |
| 199 >SDL_CDResume</TD | |
| 200 ><TD | |
| 201 WIDTH="34%" | |
| 202 ALIGN="center" | |
| 203 VALIGN="top" | |
| 204 ><A | |
| 205 HREF="cdrom.html" | |
| 206 >Up</A | |
| 207 ></TD | |
| 208 ><TD | |
| 209 WIDTH="33%" | |
| 210 ALIGN="right" | |
| 211 VALIGN="top" | |
| 212 >SDL_CDEject</TD | |
| 213 ></TR | |
| 214 ></TABLE | |
| 215 ></DIV | |
| 216 ></BODY | |
| 217 ></HTML | |
| 218 > |