Mercurial > sdl-ios-xcode
annotate docs/html/sdlmixaudio.html @ 211:0cc95f442f3a
If we're looking at the /dev/input event devices, and we found
at least one, then we don't want to look at the input joystick
devices, since they're built on top of devices that we've already
seen, so we're done.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 22 Oct 2001 21:34:50 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_MixAudio</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_ConvertAudio" | |
| 17 HREF="sdlconvertaudio.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_LockAudio" | |
| 20 HREF="sdllockaudio.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="sdlconvertaudio.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="sdllockaudio.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="SDLMIXAUDIO" | |
| 71 >SDL_MixAudio</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
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76 NAME="AEN6719" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_MixAudio -- Mix audio data</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
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84 NAME="AEN6722" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
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91 NAME="AEN6723" |
| 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 >void <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_MixAudio</B | |
| 105 ></CODE | |
| 106 >(Uint8 *dst, Uint8 *src, Uint32 len, int volume);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
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115 NAME="AEN6729" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
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120 >This function takes two audio buffers of <TT |
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121 CLASS="PARAMETER" |
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122 ><I |
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123 >len</I |
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124 ></TT |
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125 > bytes each |
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126 of the playing audio format and mixes them, performing addition, volume |
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127 adjustment, and overflow clipping. The <TT |
| 0 | 128 CLASS="PARAMETER" |
| 129 ><I | |
| 130 >volume</I | |
| 131 ></TT | |
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132 > ranges |
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133 from 0 to <TT |
| 0 | 134 CLASS="LITERAL" |
| 135 >SDL_MIX_MAXVOLUME</TT | |
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136 > and should be set to the maximum |
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137 value for full audio volume. Note this does not change hardware volume. This is |
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138 provided for convenience -- you can mix your own audio data.</P |
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139 ><DIV |
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140 CLASS="NOTE" |
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141 ><BLOCKQUOTE |
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142 CLASS="NOTE" |
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143 ><P |
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144 ><B |
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145 >Note: </B |
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146 >Do not use this function for mixing together more than two streams of sample |
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147 data. The output from repeated application of this function may be distorted |
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148 by clipping, because there is no accumulator with greater range than the |
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149 input (not to mention this being an inefficient way of doing it). |
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150 Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.</P |
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151 ></BLOCKQUOTE |
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152 ></DIV |
| 0 | 153 ></DIV |
| 154 ><DIV | |
| 155 CLASS="REFSECT1" | |
| 156 ><A | |
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157 NAME="AEN6737" |
| 0 | 158 ></A |
| 159 ><H2 | |
| 160 >See Also</H2 | |
| 161 ><P | |
| 162 ><A | |
| 163 HREF="sdlopenaudio.html" | |
| 164 ><TT | |
| 165 CLASS="FUNCTION" | |
| 166 >SDL_OpenAudio</TT | |
| 167 ></A | |
| 168 ></P | |
| 169 ></DIV | |
| 170 ><DIV | |
| 171 CLASS="NAVFOOTER" | |
| 172 ><HR | |
| 173 ALIGN="LEFT" | |
| 174 WIDTH="100%"><TABLE | |
| 175 WIDTH="100%" | |
| 176 BORDER="0" | |
| 177 CELLPADDING="0" | |
| 178 CELLSPACING="0" | |
| 179 ><TR | |
| 180 ><TD | |
| 181 WIDTH="33%" | |
| 182 ALIGN="left" | |
| 183 VALIGN="top" | |
| 184 ><A | |
| 185 HREF="sdlconvertaudio.html" | |
| 186 >Prev</A | |
| 187 ></TD | |
| 188 ><TD | |
| 189 WIDTH="34%" | |
| 190 ALIGN="center" | |
| 191 VALIGN="top" | |
| 192 ><A | |
| 193 HREF="index.html" | |
| 194 >Home</A | |
| 195 ></TD | |
| 196 ><TD | |
| 197 WIDTH="33%" | |
| 198 ALIGN="right" | |
| 199 VALIGN="top" | |
| 200 ><A | |
| 201 HREF="sdllockaudio.html" | |
| 202 >Next</A | |
| 203 ></TD | |
| 204 ></TR | |
| 205 ><TR | |
| 206 ><TD | |
| 207 WIDTH="33%" | |
| 208 ALIGN="left" | |
| 209 VALIGN="top" | |
| 210 >SDL_ConvertAudio</TD | |
| 211 ><TD | |
| 212 WIDTH="34%" | |
| 213 ALIGN="center" | |
| 214 VALIGN="top" | |
| 215 ><A | |
| 216 HREF="audio.html" | |
| 217 >Up</A | |
| 218 ></TD | |
| 219 ><TD | |
| 220 WIDTH="33%" | |
| 221 ALIGN="right" | |
| 222 VALIGN="top" | |
| 223 >SDL_LockAudio</TD | |
| 224 ></TR | |
| 225 ></TABLE | |
| 226 ></DIV | |
| 227 ></BODY | |
| 228 ></HTML | |
| 229 > |