Mercurial > sdl-ios-xcode
annotate docs/html/sdlmixaudio.html @ 81:1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
requested video mode is 16 bpp but the real video mode is 32 bpp.
| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Mon, 25 Jun 2001 22:16:44 +0000 |
| parents | 55f1f1b3e27d |
| children | e5bc29de3f0a |
| 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="AEN6560" |
| 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="AEN6563" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
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91 NAME="AEN6564" |
| 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="AEN6570" |
| 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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55f1f1b3e27d
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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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55f1f1b3e27d
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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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55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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137 value for full audio volume. Note this does not change hardware volume. This is |
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55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
138 provided for convenience -- you can mix your own audio data.</P |
| 0 | 139 ></DIV |
| 140 ><DIV | |
| 141 CLASS="REFSECT1" | |
| 142 ><A | |
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parents:
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diff
changeset
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143 NAME="AEN6576" |
| 0 | 144 ></A |
| 145 ><H2 | |
| 146 >See Also</H2 | |
| 147 ><P | |
| 148 ><A | |
| 149 HREF="sdlopenaudio.html" | |
| 150 ><TT | |
| 151 CLASS="FUNCTION" | |
| 152 >SDL_OpenAudio</TT | |
| 153 ></A | |
| 154 ></P | |
| 155 ></DIV | |
| 156 ><DIV | |
| 157 CLASS="NAVFOOTER" | |
| 158 ><HR | |
| 159 ALIGN="LEFT" | |
| 160 WIDTH="100%"><TABLE | |
| 161 WIDTH="100%" | |
| 162 BORDER="0" | |
| 163 CELLPADDING="0" | |
| 164 CELLSPACING="0" | |
| 165 ><TR | |
| 166 ><TD | |
| 167 WIDTH="33%" | |
| 168 ALIGN="left" | |
| 169 VALIGN="top" | |
| 170 ><A | |
| 171 HREF="sdlconvertaudio.html" | |
| 172 >Prev</A | |
| 173 ></TD | |
| 174 ><TD | |
| 175 WIDTH="34%" | |
| 176 ALIGN="center" | |
| 177 VALIGN="top" | |
| 178 ><A | |
| 179 HREF="index.html" | |
| 180 >Home</A | |
| 181 ></TD | |
| 182 ><TD | |
| 183 WIDTH="33%" | |
| 184 ALIGN="right" | |
| 185 VALIGN="top" | |
| 186 ><A | |
| 187 HREF="sdllockaudio.html" | |
| 188 >Next</A | |
| 189 ></TD | |
| 190 ></TR | |
| 191 ><TR | |
| 192 ><TD | |
| 193 WIDTH="33%" | |
| 194 ALIGN="left" | |
| 195 VALIGN="top" | |
| 196 >SDL_ConvertAudio</TD | |
| 197 ><TD | |
| 198 WIDTH="34%" | |
| 199 ALIGN="center" | |
| 200 VALIGN="top" | |
| 201 ><A | |
| 202 HREF="audio.html" | |
| 203 >Up</A | |
| 204 ></TD | |
| 205 ><TD | |
| 206 WIDTH="33%" | |
| 207 ALIGN="right" | |
| 208 VALIGN="top" | |
| 209 >SDL_LockAudio</TD | |
| 210 ></TR | |
| 211 ></TABLE | |
| 212 ></DIV | |
| 213 ></BODY | |
| 214 ></HTML | |
| 215 > |