Mercurial > sdl-ios-xcode
annotate docs/html/sdlpauseaudio.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 11 Oct 2005 18:16:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_PauseAudio</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Audio" | |
| 14 HREF="audio.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_OpenAudio" | |
| 17 HREF="sdlopenaudio.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GetAudioStatus" | |
| 20 HREF="sdlgetaudiostatus.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 | |
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdlopenaudio.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlgetaudiostatus.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLPAUSEAUDIO" | |
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74 ></A |
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75 >SDL_PauseAudio</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN6765" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_PauseAudio -- Pauses and unpauses the audio callback processing</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN6768" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN6769" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >void <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_PauseAudio</B | |
| 108 ></CODE | |
| 109 >(int pause_on);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN6775" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >This function pauses and unpauses the audio callback processing. | |
| 124 It should be called with <TT | |
| 125 CLASS="PARAMETER" | |
| 126 ><I | |
| 127 >pause_on</I | |
| 128 ></TT | |
| 129 >=0 after opening the audio | |
| 130 device to start playing sound. This is so you can safely initialize | |
| 131 data for your callback function after opening the audio device. | |
| 132 Silence will be written to the audio device during the pause.</P | |
| 133 ></DIV | |
| 134 ><DIV | |
| 135 CLASS="REFSECT1" | |
| 136 ><A | |
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137 NAME="AEN6779" |
| 0 | 138 ></A |
| 139 ><H2 | |
| 140 >See Also</H2 | |
| 141 ><P | |
| 142 ><A | |
| 143 HREF="sdlgetaudiostatus.html" | |
| 144 ><TT | |
| 145 CLASS="FUNCTION" | |
| 146 >SDL_GetAudioStatus</TT | |
| 147 ></A | |
| 148 >, | |
| 149 <A | |
| 150 HREF="sdlopenaudio.html" | |
| 151 ><TT | |
| 152 CLASS="FUNCTION" | |
| 153 >SDL_OpenAudio</TT | |
| 154 ></A | |
| 155 ></P | |
| 156 ></DIV | |
| 157 ><DIV | |
| 158 CLASS="NAVFOOTER" | |
| 159 ><HR | |
| 160 ALIGN="LEFT" | |
| 161 WIDTH="100%"><TABLE | |
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162 SUMMARY="Footer navigation table" |
| 0 | 163 WIDTH="100%" |
| 164 BORDER="0" | |
| 165 CELLPADDING="0" | |
| 166 CELLSPACING="0" | |
| 167 ><TR | |
| 168 ><TD | |
| 169 WIDTH="33%" | |
| 170 ALIGN="left" | |
| 171 VALIGN="top" | |
| 172 ><A | |
| 173 HREF="sdlopenaudio.html" | |
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174 ACCESSKEY="P" |
| 0 | 175 >Prev</A |
| 176 ></TD | |
| 177 ><TD | |
| 178 WIDTH="34%" | |
| 179 ALIGN="center" | |
| 180 VALIGN="top" | |
| 181 ><A | |
| 182 HREF="index.html" | |
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183 ACCESSKEY="H" |
| 0 | 184 >Home</A |
| 185 ></TD | |
| 186 ><TD | |
| 187 WIDTH="33%" | |
| 188 ALIGN="right" | |
| 189 VALIGN="top" | |
| 190 ><A | |
| 191 HREF="sdlgetaudiostatus.html" | |
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192 ACCESSKEY="N" |
| 0 | 193 >Next</A |
| 194 ></TD | |
| 195 ></TR | |
| 196 ><TR | |
| 197 ><TD | |
| 198 WIDTH="33%" | |
| 199 ALIGN="left" | |
| 200 VALIGN="top" | |
| 201 >SDL_OpenAudio</TD | |
| 202 ><TD | |
| 203 WIDTH="34%" | |
| 204 ALIGN="center" | |
| 205 VALIGN="top" | |
| 206 ><A | |
| 207 HREF="audio.html" | |
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208 ACCESSKEY="U" |
| 0 | 209 >Up</A |
| 210 ></TD | |
| 211 ><TD | |
| 212 WIDTH="33%" | |
| 213 ALIGN="right" | |
| 214 VALIGN="top" | |
| 215 >SDL_GetAudioStatus</TD | |
| 216 ></TR | |
| 217 ></TABLE | |
| 218 ></DIV | |
| 219 ></BODY | |
| 220 ></HTML | |
| 221 > |