Mercurial > sdl-ios-xcode
annotate docs/html/sdlpollevent.html @ 3096:ae4e80dbe330
Date: Tue, 17 Feb 2009 14:00:25 +0100
From: Stefan Klug
Subject: [SDL] Possible bug, paused audio playing garbage
On my WinCE device a paused audio device plays random garbage.
This might also be the issue in the thread "sound cracks with SDL_mixer
and AUDIO_S16LSB"
I don't have that much knowledge of the SDL audio part, but the attached
patch fixes it for me, and collapses two redundant ifs.
I'm not sure if this is the correct way to fix this.
Shouldn't the complete stream conversion part of the RunAudio loop be
dependent on the paused property of the device? (not only the call to
(*fill)(udata, istream, istream_len).
Anyways. Would be great if the patch or a fix could find its way to SVN ;-)
Cheers
Stefan
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 23 Mar 2009 05:21:40 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_PollEvent</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="Event Functions." | |
| 14 HREF="eventfunctions.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_PeepEvents" | |
| 17 HREF="sdlpeepevents.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_WaitEvent" | |
| 20 HREF="sdlwaitevent.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="sdlpeepevents.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="sdlwaitevent.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="SDLPOLLEVENT" | |
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74 ></A |
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75 >SDL_PollEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN5472" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_PollEvent -- Polls for currently pending events.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN5475" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN5476" |
| 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 >int <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_PollEvent</B | |
| 108 ></CODE | |
| 109 >(SDL_Event *event);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN5482" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Polls for currently pending events, and returns <SPAN | |
| 124 CLASS="RETURNVALUE" | |
| 125 >1</SPAN | |
| 126 > | |
| 127 if there are any pending events, or <SPAN | |
| 128 CLASS="RETURNVALUE" | |
| 129 >0</SPAN | |
| 130 > if there | |
| 131 are none available. </P | |
| 132 ><P | |
| 133 >If <TT | |
| 134 CLASS="PARAMETER" | |
| 135 ><I | |
| 136 >event</I | |
| 137 ></TT | |
| 138 > is not <TT | |
| 139 CLASS="LITERAL" | |
| 140 >NULL</TT | |
| 141 >, the next | |
| 142 event is removed from the queue and stored in that area.</P | |
| 143 ></DIV | |
| 144 ><DIV | |
| 145 CLASS="REFSECT1" | |
| 146 ><A | |
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147 NAME="AEN5490" |
| 0 | 148 ></A |
| 149 ><H2 | |
| 150 >Examples</H2 | |
| 151 ><P | |
| 152 ><PRE | |
| 153 CLASS="PROGRAMLISTING" | |
| 154 >SDL_Event event; /* Event structure */ | |
| 155 | |
| 156 . | |
| 157 . | |
| 158 . | |
| 159 /* Check for events */ | |
| 160 while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */ | |
| 161 switch(event.type){ /* Process the appropiate event type */ | |
| 162 case SDL_KEYDOWN: /* Handle a KEYDOWN event */ | |
| 163 printf("Oh! Key press\n"); | |
| 164 break; | |
| 165 case SDL_MOUSEMOTION: | |
| 166 . | |
| 167 . | |
| 168 . | |
| 169 default: /* Report an unhandled event */ | |
| 170 printf("I don't know what this event is!\n"); | |
| 171 } | |
| 172 }</PRE | |
| 173 ></P | |
| 174 ></DIV | |
| 175 ><DIV | |
| 176 CLASS="REFSECT1" | |
| 177 ><A | |
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178 NAME="AEN5494" |
| 0 | 179 ></A |
| 180 ><H2 | |
| 181 >See Also</H2 | |
| 182 ><P | |
| 183 ><A | |
| 184 HREF="sdlevent.html" | |
| 185 ><SPAN | |
| 186 CLASS="STRUCTNAME" | |
| 187 >SDL_Event</SPAN | |
| 188 ></A | |
| 189 >, | |
| 190 <A | |
| 191 HREF="sdlwaitevent.html" | |
| 192 ><TT | |
| 193 CLASS="FUNCTION" | |
| 194 >SDL_WaitEvent</TT | |
| 195 ></A | |
| 196 >, | |
| 197 <A | |
| 198 HREF="sdlpeepevents.html" | |
| 199 ><TT | |
| 200 CLASS="FUNCTION" | |
| 201 >SDL_PeepEvents</TT | |
| 202 ></A | |
| 203 ></P | |
| 204 ></DIV | |
| 205 ><DIV | |
| 206 CLASS="NAVFOOTER" | |
| 207 ><HR | |
| 208 ALIGN="LEFT" | |
| 209 WIDTH="100%"><TABLE | |
|
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210 SUMMARY="Footer navigation table" |
| 0 | 211 WIDTH="100%" |
| 212 BORDER="0" | |
| 213 CELLPADDING="0" | |
| 214 CELLSPACING="0" | |
| 215 ><TR | |
| 216 ><TD | |
| 217 WIDTH="33%" | |
| 218 ALIGN="left" | |
| 219 VALIGN="top" | |
| 220 ><A | |
| 221 HREF="sdlpeepevents.html" | |
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222 ACCESSKEY="P" |
| 0 | 223 >Prev</A |
| 224 ></TD | |
| 225 ><TD | |
| 226 WIDTH="34%" | |
| 227 ALIGN="center" | |
| 228 VALIGN="top" | |
| 229 ><A | |
| 230 HREF="index.html" | |
|
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231 ACCESSKEY="H" |
| 0 | 232 >Home</A |
| 233 ></TD | |
| 234 ><TD | |
| 235 WIDTH="33%" | |
| 236 ALIGN="right" | |
| 237 VALIGN="top" | |
| 238 ><A | |
| 239 HREF="sdlwaitevent.html" | |
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240 ACCESSKEY="N" |
| 0 | 241 >Next</A |
| 242 ></TD | |
| 243 ></TR | |
| 244 ><TR | |
| 245 ><TD | |
| 246 WIDTH="33%" | |
| 247 ALIGN="left" | |
| 248 VALIGN="top" | |
| 249 >SDL_PeepEvents</TD | |
| 250 ><TD | |
| 251 WIDTH="34%" | |
| 252 ALIGN="center" | |
| 253 VALIGN="top" | |
| 254 ><A | |
| 255 HREF="eventfunctions.html" | |
|
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256 ACCESSKEY="U" |
| 0 | 257 >Up</A |
| 258 ></TD | |
| 259 ><TD | |
| 260 WIDTH="33%" | |
| 261 ALIGN="right" | |
| 262 VALIGN="top" | |
| 263 >SDL_WaitEvent</TD | |
| 264 ></TR | |
| 265 ></TABLE | |
| 266 ></DIV | |
| 267 ></BODY | |
| 268 ></HTML | |
| 269 > |