Mercurial > sdl-ios-xcode
annotate docs/html/guidethebasics.html @ 3880:74e828c64315 SDL-1.2
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 24 Sep 2006 15:45:37 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >The Basics</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 Guide" | |
| 14 HREF="guide.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="Credits" | |
| 17 HREF="guidecredits.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="Initializing SDL" | |
| 20 HREF="guidebasicsinit.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="CHAPTER" | |
| 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="guidecredits.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="guidebasicsinit.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 ><DIV | |
| 72 CLASS="CHAPTER" | |
| 73 ><H1 | |
| 74 ><A | |
| 75 NAME="GUIDETHEBASICS" | |
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76 ></A |
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77 >Chapter 1. The Basics</H1 |
| 0 | 78 ><DIV |
| 79 CLASS="TOC" | |
| 80 ><DL | |
| 81 ><DT | |
| 82 ><B | |
| 83 >Table of Contents</B | |
| 84 ></DT | |
| 85 ><DT | |
| 86 ><A | |
| 87 HREF="guidethebasics.html#GUIDEINTRODUCTION" | |
| 88 >Introduction</A | |
| 89 ></DT | |
| 90 ><DT | |
| 91 ><A | |
| 92 HREF="guidebasicsinit.html" | |
| 93 >Initializing SDL</A | |
| 94 ></DT | |
| 95 ></DL | |
| 96 ></DIV | |
| 97 ><DIV | |
| 98 CLASS="SECT1" | |
| 99 ><H1 | |
| 100 CLASS="SECT1" | |
| 101 ><A | |
| 102 NAME="GUIDEINTRODUCTION" | |
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103 ></A |
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parents:
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104 >Introduction</H1 |
| 0 | 105 ><P |
| 106 >The SDL Guide section is pretty incomplete. If you feel you have anything to add mail akawaka@skynet.ie or visit http://akawaka.csn.ul.ie/tne/.</P | |
| 107 ></DIV | |
| 108 ></DIV | |
| 109 ><DIV | |
| 110 CLASS="NAVFOOTER" | |
| 111 ><HR | |
| 112 ALIGN="LEFT" | |
| 113 WIDTH="100%"><TABLE | |
|
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114 SUMMARY="Footer navigation table" |
| 0 | 115 WIDTH="100%" |
| 116 BORDER="0" | |
| 117 CELLPADDING="0" | |
| 118 CELLSPACING="0" | |
| 119 ><TR | |
| 120 ><TD | |
| 121 WIDTH="33%" | |
| 122 ALIGN="left" | |
| 123 VALIGN="top" | |
| 124 ><A | |
| 125 HREF="guidecredits.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
126 ACCESSKEY="P" |
| 0 | 127 >Prev</A |
| 128 ></TD | |
| 129 ><TD | |
| 130 WIDTH="34%" | |
| 131 ALIGN="center" | |
| 132 VALIGN="top" | |
| 133 ><A | |
| 134 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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135 ACCESSKEY="H" |
| 0 | 136 >Home</A |
| 137 ></TD | |
| 138 ><TD | |
| 139 WIDTH="33%" | |
| 140 ALIGN="right" | |
| 141 VALIGN="top" | |
| 142 ><A | |
| 143 HREF="guidebasicsinit.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
144 ACCESSKEY="N" |
| 0 | 145 >Next</A |
| 146 ></TD | |
| 147 ></TR | |
| 148 ><TR | |
| 149 ><TD | |
| 150 WIDTH="33%" | |
| 151 ALIGN="left" | |
| 152 VALIGN="top" | |
| 153 >Credits</TD | |
| 154 ><TD | |
| 155 WIDTH="34%" | |
| 156 ALIGN="center" | |
| 157 VALIGN="top" | |
| 158 ><A | |
| 159 HREF="guide.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
160 ACCESSKEY="U" |
| 0 | 161 >Up</A |
| 162 ></TD | |
| 163 ><TD | |
| 164 WIDTH="33%" | |
| 165 ALIGN="right" | |
| 166 VALIGN="top" | |
| 167 >Initializing SDL</TD | |
| 168 ></TR | |
| 169 ></TABLE | |
| 170 ></DIV | |
| 171 ></BODY | |
| 172 ></HTML | |
| 173 > |