Mercurial > sdl-ios-xcode
annotate docs/html/sdlbuildaudiocvt.html @ 641:df178851293b
Date: 28 Jun 2003 22:42:52 +0100
From: Alan Swanson
Subject: Re: [SDL] New XFree 4.3 Video Mode Patch
I have a wee amendment that moves the qsort in set_best_resolution
to only occur after failing to find an exact match only. This would
make absolutely sure we get a user set mode.
While I've never had any problems for my normal resolutions (1280x1024,
1024x768, 800x600 & 640,480) while closely examining the output from
qsort I've noticed it doesn't seem to sort the modes fully. These is
one definite wrong at 1152x768 and a few that just look wrong to me.
From a program (attached) I made to examine this more easily. X has
sorted its mode list using the same method as ours (plus frequency),
and our user modes get inserted without any other movement.
On the patch I've made I've also changed cmpmodes to sort on vertical
resolution and then horizontal. Ie vertical is now most significant
bit.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 28 Jun 2003 21:52:26 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_BuildAudioCVT</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="Audio" | |
| 14 HREF="audio.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_AudioCVT" | |
| 17 HREF="sdlaudiocvt.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_ConvertAudio" | |
| 20 HREF="sdlconvertaudio.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="sdlaudiocvt.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="sdlconvertaudio.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="SDLBUILDAUDIOCVT" | |
| 71 >SDL_BuildAudioCVT</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN6614" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_BuildAudioCVT -- Initializes a SDL_AudioCVT structure for conversion</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
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84 NAME="AEN6617" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN6618" |
| 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 >int <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_BuildAudioCVT</B | |
| 105 ></CODE | |
| 106 >(SDL_AudioCVT *cvt, Uint16 src_format, Uint8 src_channels, int src_rate, Uint16 dst_format, Uint8 dst_channels, int dst_rate);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN6624" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Before an <A | |
| 121 HREF="sdlaudiocvt.html" | |
| 122 ><SPAN | |
| 123 CLASS="STRUCTNAME" | |
| 124 >SDL_AudioCVT</SPAN | |
| 125 ></A | |
| 126 > structure can be used to convert audio data it must be initialized with source and destination information. </P | |
| 127 ><P | |
| 128 ><TT | |
| 129 CLASS="PARAMETER" | |
| 130 ><I | |
| 131 >src_format</I | |
| 132 ></TT | |
| 133 > and <TT | |
| 134 CLASS="PARAMETER" | |
| 135 ><I | |
| 136 >dst_format</I | |
| 137 ></TT | |
| 138 > are the source and destination format of the conversion. (For information on audio formats see <A | |
| 139 HREF="sdlaudiospec.html" | |
| 140 ><SPAN | |
| 141 CLASS="STRUCTNAME" | |
| 142 > SDL_AudioSpec</SPAN | |
| 143 ></A | |
| 144 >). <TT | |
| 145 CLASS="PARAMETER" | |
| 146 ><I | |
| 147 >src_channels</I | |
| 148 ></TT | |
| 149 > and <TT | |
| 150 CLASS="PARAMETER" | |
| 151 ><I | |
| 152 >dst_channels</I | |
| 153 ></TT | |
| 154 > are the number of channels in the source and destination formats. Finally, <TT | |
| 155 CLASS="PARAMETER" | |
| 156 ><I | |
| 157 >src_rate</I | |
| 158 ></TT | |
| 159 > and <TT | |
| 160 CLASS="PARAMETER" | |
| 161 ><I | |
| 162 >dst_rate</I | |
| 163 ></TT | |
| 164 > are the frequency or samples-per-second of the source and destination formats. Once again, see <A | |
| 165 HREF="sdlaudiospec.html" | |
| 166 ><SPAN | |
| 167 CLASS="STRUCTNAME" | |
| 168 >SDL_AudioSpec</SPAN | |
| 169 ></A | |
| 170 >.</P | |
| 171 ></DIV | |
| 172 ><DIV | |
| 173 CLASS="REFSECT1" | |
| 174 ><A | |
|
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175 NAME="AEN6640" |
| 0 | 176 ></A |
| 177 ><H2 | |
| 178 >Return Values</H2 | |
| 179 ><P | |
| 180 >Returns <SPAN | |
| 181 CLASS="RETURNVALUE" | |
| 182 >-1</SPAN | |
| 183 > if the filter could not be built or 1 if it could.</P | |
| 184 ></DIV | |
| 185 ><DIV | |
| 186 CLASS="REFSECT1" | |
| 187 ><A | |
|
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188 NAME="AEN6644" |
| 0 | 189 ></A |
| 190 ><H2 | |
| 191 >Examples</H2 | |
| 192 ><P | |
| 193 >See <A | |
| 194 HREF="sdlconvertaudio.html" | |
| 195 ><TT | |
| 196 CLASS="FUNCTION" | |
| 197 >SDL_ConvertAudio</TT | |
| 198 ></A | |
| 199 >.</P | |
| 200 ></DIV | |
| 201 ><DIV | |
| 202 CLASS="REFSECT1" | |
| 203 ><A | |
|
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204 NAME="AEN6649" |
| 0 | 205 ></A |
| 206 ><H2 | |
| 207 >See Also</H2 | |
| 208 ><P | |
| 209 ><A | |
| 210 HREF="sdlconvertaudio.html" | |
| 211 ><TT | |
| 212 CLASS="FUNCTION" | |
| 213 >SDL_ConvertAudio</TT | |
| 214 ></A | |
| 215 >, | |
| 216 <A | |
| 217 HREF="sdlaudiocvt.html" | |
| 218 ><TT | |
| 219 CLASS="FUNCTION" | |
| 220 >SDL_AudioCVT</TT | |
| 221 ></A | |
| 222 ></P | |
| 223 ></DIV | |
| 224 ><DIV | |
| 225 CLASS="NAVFOOTER" | |
| 226 ><HR | |
| 227 ALIGN="LEFT" | |
| 228 WIDTH="100%"><TABLE | |
| 229 WIDTH="100%" | |
| 230 BORDER="0" | |
| 231 CELLPADDING="0" | |
| 232 CELLSPACING="0" | |
| 233 ><TR | |
| 234 ><TD | |
| 235 WIDTH="33%" | |
| 236 ALIGN="left" | |
| 237 VALIGN="top" | |
| 238 ><A | |
| 239 HREF="sdlaudiocvt.html" | |
| 240 >Prev</A | |
| 241 ></TD | |
| 242 ><TD | |
| 243 WIDTH="34%" | |
| 244 ALIGN="center" | |
| 245 VALIGN="top" | |
| 246 ><A | |
| 247 HREF="index.html" | |
| 248 >Home</A | |
| 249 ></TD | |
| 250 ><TD | |
| 251 WIDTH="33%" | |
| 252 ALIGN="right" | |
| 253 VALIGN="top" | |
| 254 ><A | |
| 255 HREF="sdlconvertaudio.html" | |
| 256 >Next</A | |
| 257 ></TD | |
| 258 ></TR | |
| 259 ><TR | |
| 260 ><TD | |
| 261 WIDTH="33%" | |
| 262 ALIGN="left" | |
| 263 VALIGN="top" | |
| 264 >SDL_AudioCVT</TD | |
| 265 ><TD | |
| 266 WIDTH="34%" | |
| 267 ALIGN="center" | |
| 268 VALIGN="top" | |
| 269 ><A | |
| 270 HREF="audio.html" | |
| 271 >Up</A | |
| 272 ></TD | |
| 273 ><TD | |
| 274 WIDTH="33%" | |
| 275 ALIGN="right" | |
| 276 VALIGN="top" | |
| 277 >SDL_ConvertAudio</TD | |
| 278 ></TR | |
| 279 ></TABLE | |
| 280 ></DIV | |
| 281 ></BODY | |
| 282 ></HTML | |
| 283 > |