Mercurial > sdl-ios-xcode
annotate docs/html/sdlflip.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_Flip</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="Video" | |
| 14 HREF="video.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_UpdateRects" | |
| 17 HREF="sdlupdaterects.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_SetColors" | |
| 20 HREF="sdlsetcolors.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="sdlupdaterects.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="sdlsetcolors.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="SDLFLIP" | |
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74 ></A |
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75 >SDL_Flip</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN1426" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_Flip -- Swaps screen buffers</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN1429" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN1430" |
| 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_Flip</B | |
| 108 ></CODE | |
| 109 >(SDL_Surface *screen);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN1436" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >On hardware that supports double-buffering, this function sets up a flip | |
| 124 and returns. The hardware will wait for vertical retrace, and then swap | |
| 125 video buffers before the next video surface blit or lock will return. | |
| 126 On hardware that doesn't support double-buffering, this is equivalent | |
| 127 to calling <A | |
| 128 HREF="sdlupdaterect.html" | |
| 129 >SDL_UpdateRect</A | |
| 130 ><TT | |
| 131 CLASS="PARAMETER" | |
| 132 ><I | |
| 133 >(screen, 0, 0, 0, 0)</I | |
| 134 ></TT | |
| 135 ></P | |
| 136 ><P | |
| 137 >The <TT | |
| 138 CLASS="LITERAL" | |
| 139 >SDL_DOUBLEBUF</TT | |
| 140 > flag must have been passed to | |
| 141 <A | |
| 142 HREF="sdlsetvideomode.html" | |
| 143 >SDL_SetVideoMode</A | |
| 144 >, | |
| 145 when | |
| 146 setting the video mode for this function to perform hardware flipping.</P | |
| 147 ></DIV | |
| 148 ><DIV | |
| 149 CLASS="REFSECT1" | |
| 150 ><A | |
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151 NAME="AEN1444" |
| 0 | 152 ></A |
| 153 ><H2 | |
| 154 >Return Value</H2 | |
| 155 ><P | |
| 156 >This function returns <SPAN | |
| 157 CLASS="RETURNVALUE" | |
| 158 >0</SPAN | |
| 159 > if successful, or | |
| 160 <SPAN | |
| 161 CLASS="RETURNVALUE" | |
| 162 >-1</SPAN | |
| 163 > if there was an error.</P | |
| 164 ></DIV | |
| 165 ><DIV | |
| 166 CLASS="REFSECT1" | |
| 167 ><A | |
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168 NAME="AEN1449" |
| 0 | 169 ></A |
| 170 ><H2 | |
| 171 >See Also</H2 | |
| 172 ><P | |
| 173 ><A | |
| 174 HREF="sdlsetvideomode.html" | |
| 175 ><TT | |
| 176 CLASS="FUNCTION" | |
| 177 >SDL_SetVideoMode</TT | |
| 178 ></A | |
| 179 >, | |
| 180 <A | |
| 181 HREF="sdlupdaterect.html" | |
| 182 ><TT | |
| 183 CLASS="FUNCTION" | |
| 184 >SDL_UpdateRect</TT | |
| 185 ></A | |
| 186 >, | |
| 187 <A | |
| 188 HREF="sdlsurface.html" | |
| 189 ><SPAN | |
| 190 CLASS="STRUCTNAME" | |
| 191 >SDL_Surface</SPAN | |
| 192 ></A | |
| 193 ></P | |
| 194 ></DIV | |
| 195 ><DIV | |
| 196 CLASS="NAVFOOTER" | |
| 197 ><HR | |
| 198 ALIGN="LEFT" | |
| 199 WIDTH="100%"><TABLE | |
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200 SUMMARY="Footer navigation table" |
| 0 | 201 WIDTH="100%" |
| 202 BORDER="0" | |
| 203 CELLPADDING="0" | |
| 204 CELLSPACING="0" | |
| 205 ><TR | |
| 206 ><TD | |
| 207 WIDTH="33%" | |
| 208 ALIGN="left" | |
| 209 VALIGN="top" | |
| 210 ><A | |
| 211 HREF="sdlupdaterects.html" | |
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212 ACCESSKEY="P" |
| 0 | 213 >Prev</A |
| 214 ></TD | |
| 215 ><TD | |
| 216 WIDTH="34%" | |
| 217 ALIGN="center" | |
| 218 VALIGN="top" | |
| 219 ><A | |
| 220 HREF="index.html" | |
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221 ACCESSKEY="H" |
| 0 | 222 >Home</A |
| 223 ></TD | |
| 224 ><TD | |
| 225 WIDTH="33%" | |
| 226 ALIGN="right" | |
| 227 VALIGN="top" | |
| 228 ><A | |
| 229 HREF="sdlsetcolors.html" | |
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803
355632dca928
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parents:
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230 ACCESSKEY="N" |
| 0 | 231 >Next</A |
| 232 ></TD | |
| 233 ></TR | |
| 234 ><TR | |
| 235 ><TD | |
| 236 WIDTH="33%" | |
| 237 ALIGN="left" | |
| 238 VALIGN="top" | |
| 239 >SDL_UpdateRects</TD | |
| 240 ><TD | |
| 241 WIDTH="34%" | |
| 242 ALIGN="center" | |
| 243 VALIGN="top" | |
| 244 ><A | |
| 245 HREF="video.html" | |
|
803
355632dca928
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parents:
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246 ACCESSKEY="U" |
| 0 | 247 >Up</A |
| 248 ></TD | |
| 249 ><TD | |
| 250 WIDTH="33%" | |
| 251 ALIGN="right" | |
| 252 VALIGN="top" | |
| 253 >SDL_SetColors</TD | |
| 254 ></TR | |
| 255 ></TABLE | |
| 256 ></DIV | |
| 257 ></BODY | |
| 258 ></HTML | |
| 259 > |