Mercurial > sdl-ios-xcode
annotate docs/html/sdlmixaudio.html @ 181:e5bc29de3f0a
Updated from the SDL Documentation Project
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 14 Sep 2001 02:41:09 +0000 |
parents | 55f1f1b3e27d |
children | 355632dca928 |
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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 | |
181
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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 |
181
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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 > |