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237 lines
3.4 KiB
237 lines
3.4 KiB
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>SDL_MixAudio</TITLE |
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>SDL Library Documentation</TH |
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><H1 |
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><A |
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NAME="SDLMIXAUDIO" |
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>SDL_MixAudio</H1 |
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><DIV |
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CLASS="REFNAMEDIV" |
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><A |
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NAME="AEN7107" |
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></A |
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><H2 |
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>Name</H2 |
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>SDL_MixAudio -- Mix audio data</DIV |
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>Synopsis</H2 |
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><P |
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><PRE |
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CLASS="FUNCSYNOPSISINFO" |
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>#include "SDL.h"</PRE |
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><P |
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><CODE |
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><CODE |
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CLASS="FUNCDEF" |
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>void <B |
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CLASS="FSFUNC" |
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>SDL_MixAudio</B |
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></CODE |
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>(Uint8 *dst, Uint8 *src, Uint32 len, int volume);</CODE |
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><A |
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NAME="AEN7117" |
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><H2 |
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>Description</H2 |
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><P |
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>This function takes two audio buffers of <TT |
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CLASS="PARAMETER" |
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><I |
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>len</I |
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></TT |
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> bytes each |
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of the playing audio format and mixes them, performing addition, volume |
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adjustment, and overflow clipping. The <TT |
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CLASS="PARAMETER" |
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><I |
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>volume</I |
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></TT |
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> ranges |
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from 0 to <TT |
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CLASS="LITERAL" |
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>SDL_MIX_MAXVOLUME</TT |
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> and should be set to the maximum |
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value for full audio volume. Note this does not change hardware volume. This is |
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provided for convenience -- you can mix your own audio data.</P |
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><BLOCKQUOTE |
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><P |
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><B |
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>Note: </B |
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>Do not use this function for mixing together more than two streams of sample |
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data. The output from repeated application of this function may be distorted |
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by clipping, because there is no accumulator with greater range than the |
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input (not to mention this being an inefficient way of doing it). |
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Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.</P |
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>See Also</H2 |
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><P |
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HREF="sdlopenaudio.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_OpenAudio</TT |
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>SDL_ConvertAudio</TD |
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