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75 | >SDL_MixAudio</H1 |
76 | ><DIV |
77 | CLASS="REFNAMEDIV" |
78 | ><A |
79 | NAME="AEN7107" |
80 | ></A |
81 | ><H2 |
82 | >Name</H2 |
83 | >SDL_MixAudio -- Mix audio data</DIV |
84 | ><DIV |
85 | CLASS="REFSYNOPSISDIV" |
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87 | NAME="AEN7110" |
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89 | ><H2 |
90 | >Synopsis</H2 |
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98 | ><PRE |
99 | CLASS="FUNCSYNOPSISINFO" |
100 | >#include "SDL.h"</PRE |
101 | ><P |
102 | ><CODE |
103 | ><CODE |
104 | CLASS="FUNCDEF" |
105 | >void <B |
106 | CLASS="FSFUNC" |
107 | >SDL_MixAudio</B |
108 | ></CODE |
109 | >(Uint8 *dst, Uint8 *src, Uint32 len, int volume);</CODE |
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118 | NAME="AEN7117" |
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120 | ><H2 |
121 | >Description</H2 |
122 | ><P |
123 | >This function takes two audio buffers of <TT |
124 | CLASS="PARAMETER" |
125 | ><I |
126 | >len</I |
127 | ></TT |
128 | > bytes each |
129 | of the playing audio format and mixes them, performing addition, volume |
130 | adjustment, and overflow clipping. The <TT |
131 | CLASS="PARAMETER" |
132 | ><I |
133 | >volume</I |
134 | ></TT |
135 | > ranges |
136 | from 0 to <TT |
137 | CLASS="LITERAL" |
138 | >SDL_MIX_MAXVOLUME</TT |
139 | > and should be set to the maximum |
140 | value for full audio volume. Note this does not change hardware volume. This is |
141 | provided for convenience -- you can mix your own audio data.</P |
142 | ><DIV |
143 | CLASS="NOTE" |
144 | ><BLOCKQUOTE |
145 | CLASS="NOTE" |
146 | ><P |
147 | ><B |
148 | >Note: </B |
149 | >Do not use this function for mixing together more than two streams of sample |
150 | data. The output from repeated application of this function may be distorted |
151 | by clipping, because there is no accumulator with greater range than the |
152 | input (not to mention this being an inefficient way of doing it). |
153 | Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.</P |
154 | ></BLOCKQUOTE |
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163 | >See Also</H2 |
164 | ><P |
165 | ><A |
166 | HREF="sdlopenaudio.html" |
167 | ><TT |
168 | CLASS="FUNCTION" |
169 | >SDL_OpenAudio</TT |
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