view docs/man3/SDL_MixAudio.3 @ 4138:b1fd24d62e55 SDL-1.2

Date: Tue, 05 Feb 2008 01:41:08 -0500 From: Mike Miscevic Subject: SDL and capslock/numlock Find attached a patch against SDL-1.2.13 for check of SDL_NO_LOCK_KEYS environment variable. This differs slightly from other patches I've seen in that it has 3 modes: Disable CAPS-LOCK and NUM-LOCK supression of down+up key events, suitable for games where the player needs these keys to do more than just toggle. A value of 1 will effect both CAPS-LOCK and NUM-LOCK. A value of 2 will effect only CAPS-LOCK. A value of 3 will effect only NUM-LOCK. All other values have no effect. This works for me and has been tested on: - Fedora 8 64-bit - SRCRPM SDL-1.2.13-1.fc8.src.rpm - Emeny Territory Quake Wars (ETQW), native 32-bit commercial game --Mike Miscevic
author Sam Lantinga <slouken@libsdl.org>
date Tue, 26 Feb 2008 10:50:28 +0000
parents 4e3b250c950e
children 1238da4a7112
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.TH "SDL_MixAudio" "3" "Tue 11 Sep 2001, 22:58" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_MixAudio \- Mix audio data
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBvoid \fBSDL_MixAudio\fP\fR(\fBUint8 *dst, Uint8 *src, Uint32 len, int volume\fR);
.SH "DESCRIPTION"
.PP
This function takes two audio buffers of \fBlen\fR bytes each of the playing audio format and mixes them, performing addition, volume adjustment, and overflow clipping\&. The \fBvolume\fR ranges from 0 to \fBSDL_MIX_MAXVOLUME\fP 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\&.
.PP
.RS
\fBNote:  
.PP
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\&.
.RE
.SH "SEE ALSO"
.PP
\fI\fBSDL_OpenAudio\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:58