view docs/html/sdlmixaudio.html @ 766:ed57c876700d

Date: Wed, 26 Nov 2003 01:52:02 +0800 From: "Andy Pfiffer" Subject: [SDL] patch: PocketPC 2000 diffs for release_1_2_6 I was making a backup of my current workspace of SDL for PocketPC, and thought I would send out my diffs. Apologies in advance if the patch has become whitespace mangled. These diffs are relative to CVS tag release_1_2_6, and contain (I think) all changes that have been mentioned on the mailing list in the last few months. I only have PocketPC 2000 & an ARM-based device (iPaq 3635), and I only use Embedded Visual Tools 3.0, so I can't say for sure if it breaks other PocketPC 200[023] builds.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2004 15:48:44 +0000 (2004-01-04)
parents e5bc29de3f0a
children 355632dca928
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><H1
><A
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>SDL_MixAudio</A
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><DIV
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><A
NAME="AEN6719"
></A
><H2
>Name</H2
>SDL_MixAudio&nbsp;--&nbsp;Mix audio data</DIV
><DIV
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>Synopsis</H2
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><P
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><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_MixAudio</B
></CODE
>(Uint8 *dst, Uint8 *src, Uint32 len, int volume);</CODE
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><H2
>Description</H2
><P
>This function takes two audio buffers of <TT
CLASS="PARAMETER"
><I
>len</I
></TT
> bytes each
of the playing audio format and mixes them, performing addition, volume
adjustment, and overflow clipping. The <TT
CLASS="PARAMETER"
><I
>volume</I
></TT
> ranges
from 0 to <TT
CLASS="LITERAL"
>SDL_MIX_MAXVOLUME</TT
> and should be set to the maximum
value for full audio volume. Note this does not change hardware volume. This is
provided for convenience -- you can mix your own audio data.</P
><DIV
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><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>Do not use this function for mixing together more than two streams of sample
data. The output from repeated application of this function may be distorted
by clipping, because there is no accumulator with greater range than the
input (not to mention this being an inefficient way of doing it).
Use mixing functions from SDL_mixer, OpenAL, or write your own mixer instead.</P
></BLOCKQUOTE
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>See Also</H2
><P
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><TT
CLASS="FUNCTION"
>SDL_OpenAudio</TT
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