Mercurial > sdl-ios-xcode
annotate docs/html/sdlcdname.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_CDName</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_CDNumDrives" | |
| 17 HREF="sdlcdnumdrives.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CDOpen" | |
| 20 HREF="sdlcdopen.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="sdlcdnumdrives.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="sdlcdopen.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="SDLCDNAME" | |
| 71 >SDL_CDName</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN6852" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_CDName -- Returns a human-readable, system-dependent identifier for the CD-ROM.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN6855" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN6856" |
| 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 >const char *<B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_CDName</B | |
| 105 ></CODE | |
| 106 >(int drive);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN6862" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Returns a human-readable, system-dependent identifier for the CD-ROM. <TT | |
| 121 CLASS="PARAMETER" | |
| 122 ><I | |
| 123 >drive</I | |
| 124 ></TT | |
| 125 > is the index of the drive. Drive indices start to 0 and end at <TT | |
| 126 CLASS="FUNCTION" | |
| 127 >SDL_CDNumDrives()</TT | |
| 128 >-1.</P | |
| 129 ></DIV | |
| 130 ><DIV | |
| 131 CLASS="REFSECT1" | |
| 132 ><A | |
|
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133 NAME="AEN6867" |
| 0 | 134 ></A |
| 135 ><H2 | |
| 136 >Examples</H2 | |
| 137 ><P | |
| 138 ><P | |
| 139 ></P | |
| 140 ><UL | |
| 141 ><LI | |
| 142 ><P | |
| 143 >"/dev/cdrom"</P | |
| 144 ></LI | |
| 145 ><LI | |
| 146 ><P | |
| 147 >"E:"</P | |
| 148 ></LI | |
| 149 ><LI | |
| 150 ><P | |
| 151 >"/dev/disk/ide/1/master"</P | |
| 152 ></LI | |
| 153 ></UL | |
| 154 ></P | |
| 155 ></DIV | |
| 156 ><DIV | |
| 157 CLASS="REFSECT1" | |
| 158 ><A | |
|
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159 NAME="AEN6877" |
| 0 | 160 ></A |
| 161 ><H2 | |
| 162 >See Also</H2 | |
| 163 ><P | |
| 164 ><A | |
| 165 HREF="sdlcdnumdrives.html" | |
| 166 ><TT | |
| 167 CLASS="FUNCTION" | |
| 168 >SDL_CDNumDrives</TT | |
| 169 ></A | |
| 170 ></P | |
| 171 ></DIV | |
| 172 ><DIV | |
| 173 CLASS="NAVFOOTER" | |
| 174 ><HR | |
| 175 ALIGN="LEFT" | |
| 176 WIDTH="100%"><TABLE | |
| 177 WIDTH="100%" | |
| 178 BORDER="0" | |
| 179 CELLPADDING="0" | |
| 180 CELLSPACING="0" | |
| 181 ><TR | |
| 182 ><TD | |
| 183 WIDTH="33%" | |
| 184 ALIGN="left" | |
| 185 VALIGN="top" | |
| 186 ><A | |
| 187 HREF="sdlcdnumdrives.html" | |
| 188 >Prev</A | |
| 189 ></TD | |
| 190 ><TD | |
| 191 WIDTH="34%" | |
| 192 ALIGN="center" | |
| 193 VALIGN="top" | |
| 194 ><A | |
| 195 HREF="index.html" | |
| 196 >Home</A | |
| 197 ></TD | |
| 198 ><TD | |
| 199 WIDTH="33%" | |
| 200 ALIGN="right" | |
| 201 VALIGN="top" | |
| 202 ><A | |
| 203 HREF="sdlcdopen.html" | |
| 204 >Next</A | |
| 205 ></TD | |
| 206 ></TR | |
| 207 ><TR | |
| 208 ><TD | |
| 209 WIDTH="33%" | |
| 210 ALIGN="left" | |
| 211 VALIGN="top" | |
| 212 >SDL_CDNumDrives</TD | |
| 213 ><TD | |
| 214 WIDTH="34%" | |
| 215 ALIGN="center" | |
| 216 VALIGN="top" | |
| 217 ><A | |
| 218 HREF="cdrom.html" | |
| 219 >Up</A | |
| 220 ></TD | |
| 221 ><TD | |
| 222 WIDTH="33%" | |
| 223 ALIGN="right" | |
| 224 VALIGN="top" | |
| 225 >SDL_CDOpen</TD | |
| 226 ></TR | |
| 227 ></TABLE | |
| 228 ></DIV | |
| 229 ></BODY | |
| 230 ></HTML | |
| 231 > |