Mercurial > sdl-ios-xcode
annotate docs/html/sdlactiveevent.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 |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_ActiveEvent</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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_Event" | |
| 17 HREF="sdlevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_KeyboardEvent" | |
| 20 HREF="sdlkeyboardevent.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="sdlevent.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="sdlkeyboardevent.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="SDLACTIVEEVENT" | |
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74 ></A |
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75 >SDL_ActiveEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN3955" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_ActiveEvent -- Application visibility event structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN3958" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type; | |
| 95 Uint8 gain; | |
| 96 Uint8 state; | |
| 97 } SDL_ActiveEvent;</PRE | |
| 98 ></DIV | |
| 99 ><DIV | |
| 100 CLASS="REFSECT1" | |
| 101 ><A | |
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102 NAME="AEN3961" |
| 0 | 103 ></A |
| 104 ><H2 | |
| 105 >Structure Data</H2 | |
| 106 ><DIV | |
| 107 CLASS="INFORMALTABLE" | |
| 108 ><A | |
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109 NAME="AEN3963" |
| 0 | 110 ></A |
| 111 ><P | |
| 112 ></P | |
| 113 ><TABLE | |
| 114 BORDER="0" | |
| 115 CLASS="CALSTABLE" | |
| 116 ><TBODY | |
| 117 ><TR | |
| 118 ><TD | |
| 119 ALIGN="LEFT" | |
| 120 VALIGN="TOP" | |
| 121 ><TT | |
| 122 CLASS="STRUCTFIELD" | |
| 123 ><I | |
| 124 >type</I | |
| 125 ></TT | |
| 126 ></TD | |
| 127 ><TD | |
| 128 ALIGN="LEFT" | |
| 129 VALIGN="TOP" | |
| 130 ><TT | |
| 131 CLASS="LITERAL" | |
| 132 >SDL_ACTIVEEVENT.</TT | |
| 133 ></TD | |
| 134 ></TR | |
| 135 ><TR | |
| 136 ><TD | |
| 137 ALIGN="LEFT" | |
| 138 VALIGN="TOP" | |
| 139 ><TT | |
| 140 CLASS="STRUCTFIELD" | |
| 141 ><I | |
| 142 >gain</I | |
| 143 ></TT | |
| 144 ></TD | |
| 145 ><TD | |
| 146 ALIGN="LEFT" | |
| 147 VALIGN="TOP" | |
| 148 >0 if the event is a loss or 1 if it is a gain.</TD | |
| 149 ></TR | |
| 150 ><TR | |
| 151 ><TD | |
| 152 ALIGN="LEFT" | |
| 153 VALIGN="TOP" | |
| 154 ><TT | |
| 155 CLASS="STRUCTFIELD" | |
| 156 ><I | |
| 157 >state</I | |
| 158 ></TT | |
| 159 ></TD | |
| 160 ><TD | |
| 161 ALIGN="LEFT" | |
| 162 VALIGN="TOP" | |
| 163 ><TT | |
| 164 CLASS="LITERAL" | |
| 165 >SDL_APPMOUSEFOCUS</TT | |
| 166 > if mouse focus was gained or lost, <TT | |
| 167 CLASS="LITERAL" | |
| 168 >SDL_APPINPUTFOCUS</TT | |
| 169 > if input focus was gained or lost, or <TT | |
| 170 CLASS="LITERAL" | |
| 171 >SDL_APPACTIVE</TT | |
| 172 > if the application was iconified (<TT | |
| 173 CLASS="STRUCTFIELD" | |
| 174 ><I | |
| 175 >gain</I | |
| 176 ></TT | |
| 177 >=0) or restored(<TT | |
| 178 CLASS="STRUCTFIELD" | |
| 179 ><I | |
| 180 >gain</I | |
| 181 ></TT | |
| 182 >=1).</TD | |
| 183 ></TR | |
| 184 ></TBODY | |
| 185 ></TABLE | |
| 186 ><P | |
| 187 ></P | |
| 188 ></DIV | |
| 189 ></DIV | |
| 190 ><DIV | |
| 191 CLASS="REFSECT1" | |
| 192 ><A | |
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193 NAME="AEN3984" |
| 0 | 194 ></A |
| 195 ><H2 | |
| 196 >Description</H2 | |
| 197 ><P | |
| 198 ><SPAN | |
| 199 CLASS="STRUCTNAME" | |
| 200 >SDL_ActiveEvent</SPAN | |
| 201 > is a member of the <A | |
| 202 HREF="sdlevent.html" | |
| 203 ><SPAN | |
| 204 CLASS="STRUCTNAME" | |
| 205 >SDL_Event</SPAN | |
| 206 ></A | |
| 207 > union and is used when an event of type <TT | |
| 208 CLASS="LITERAL" | |
| 209 >SDL_ACTIVEEVENT</TT | |
| 210 > is reported.</P | |
| 211 ><P | |
| 212 >When the mouse leaves or enters the window area a <TT | |
| 213 CLASS="LITERAL" | |
| 214 >SDL_APPMOUSEFOCUS</TT | |
| 215 > type activation event occurs, if the mouse entered the window then <TT | |
| 216 CLASS="STRUCTFIELD" | |
| 217 ><I | |
| 218 >gain</I | |
| 219 ></TT | |
| 220 > will be 1, otherwise <TT | |
| 221 CLASS="STRUCTFIELD" | |
| 222 ><I | |
| 223 >gain</I | |
| 224 ></TT | |
| 225 > will be 0. A <TT | |
| 226 CLASS="LITERAL" | |
| 227 >SDL_APPINPUTFOCUS</TT | |
| 228 > type activation event occurs when the application loses or gains keyboard focus. This usually occurs when another application is made active. Finally, a <TT | |
| 229 CLASS="LITERAL" | |
| 230 >SDL_APPACTIVE</TT | |
| 231 > type event occurs when the application is either minimised/iconified (<TT | |
| 232 CLASS="STRUCTFIELD" | |
| 233 ><I | |
| 234 >gain</I | |
| 235 ></TT | |
| 236 >=0) or restored.</P | |
| 237 ><DIV | |
| 238 CLASS="NOTE" | |
| 239 ><BLOCKQUOTE | |
| 240 CLASS="NOTE" | |
| 241 ><P | |
| 242 ><B | |
| 243 >Note: </B | |
| 244 >This event does not occur when an application window is first created.</P | |
| 245 ></BLOCKQUOTE | |
| 246 ></DIV | |
| 247 ></DIV | |
| 248 ><DIV | |
| 249 CLASS="REFSECT1" | |
| 250 ><A | |
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251 NAME="AEN4000" |
| 0 | 252 ></A |
| 253 ><H2 | |
| 254 >See Also</H2 | |
| 255 ><P | |
| 256 ><A | |
| 257 HREF="sdlevent.html" | |
| 258 ><SPAN | |
| 259 CLASS="STRUCTNAME" | |
| 260 >SDL_Event</SPAN | |
| 261 ></A | |
| 262 >, | |
| 263 <A | |
| 264 HREF="sdlgetappstate.html" | |
| 265 ><TT | |
| 266 CLASS="FUNCTION" | |
| 267 >SDL_GetAppState</TT | |
| 268 ></A | |
| 269 ></P | |
| 270 ></DIV | |
| 271 ><DIV | |
| 272 CLASS="NAVFOOTER" | |
| 273 ><HR | |
| 274 ALIGN="LEFT" | |
| 275 WIDTH="100%"><TABLE | |
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276 SUMMARY="Footer navigation table" |
| 0 | 277 WIDTH="100%" |
| 278 BORDER="0" | |
| 279 CELLPADDING="0" | |
| 280 CELLSPACING="0" | |
| 281 ><TR | |
| 282 ><TD | |
| 283 WIDTH="33%" | |
| 284 ALIGN="left" | |
| 285 VALIGN="top" | |
| 286 ><A | |
| 287 HREF="sdlevent.html" | |
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288 ACCESSKEY="P" |
| 0 | 289 >Prev</A |
| 290 ></TD | |
| 291 ><TD | |
| 292 WIDTH="34%" | |
| 293 ALIGN="center" | |
| 294 VALIGN="top" | |
| 295 ><A | |
| 296 HREF="index.html" | |
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297 ACCESSKEY="H" |
| 0 | 298 >Home</A |
| 299 ></TD | |
| 300 ><TD | |
| 301 WIDTH="33%" | |
| 302 ALIGN="right" | |
| 303 VALIGN="top" | |
| 304 ><A | |
| 305 HREF="sdlkeyboardevent.html" | |
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306 ACCESSKEY="N" |
| 0 | 307 >Next</A |
| 308 ></TD | |
| 309 ></TR | |
| 310 ><TR | |
| 311 ><TD | |
| 312 WIDTH="33%" | |
| 313 ALIGN="left" | |
| 314 VALIGN="top" | |
| 315 >SDL_Event</TD | |
| 316 ><TD | |
| 317 WIDTH="34%" | |
| 318 ALIGN="center" | |
| 319 VALIGN="top" | |
| 320 ><A | |
| 321 HREF="eventstructures.html" | |
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322 ACCESSKEY="U" |
| 0 | 323 >Up</A |
| 324 ></TD | |
| 325 ><TD | |
| 326 WIDTH="33%" | |
| 327 ALIGN="right" | |
| 328 VALIGN="top" | |
| 329 >SDL_KeyboardEvent</TD | |
| 330 ></TR | |
| 331 ></TABLE | |
| 332 ></DIV | |
| 333 ></BODY | |
| 334 ></HTML | |
| 335 > |