--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/alt_audio_convert.h	Mon May 20 16:18:09 2002 +0000
@@ -0,0 +1,67 @@
+/*
+   Extended Audio Converter for SDL (Simple DirectMedia Layer)
+   Copyright (C) 2002  Frank Ranostaj
+                       Institute of Applied Physik
+                       Johann Wolfgang Goethe-Universität
+                       Frankfurt am Main, Germany
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+   Frank Ranostaj
+   ranostaj@stud.uni-frankfurt.de
+
+(This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
+
+*/
+
+#ifndef _INCLUDE_AUDIO_CONVERT_H_
+#define _INCLUDE_AUDIO_CONVERT_H_
+
+#include "SDL_audio.h"
+#define Sound_AI_Loop 0x2
+#define _fsize 64
+
+
+typedef struct{
+   short c[16][2*_fsize];
+   char incr[16];
+   int pos_mod;
+} VarFilter;
+
+typedef struct{
+   short* buffer;
+   int mode;
+   VarFilter *filter;
+} AdapterC;
+
+typedef struct{
+   int needed;
+   VarFilter filter;
+   double len_mult;           /* buffer must be len*len_mult big*/
+   Uint8* buf;
+   int len;
+   int    len_cvt;                 /* Length of converted audio buffer */
+   int    add;
+   int (*adapter[32]) ( AdapterC Data, int length );
+} Sound_AudioCVT;
+
+extern DECLSPEC int Sound_ConvertAudio( Sound_AudioCVT *Data );
+
+extern DECLSPEC int Sound_BuildAudioConverter( Sound_AudioCVT *Data,
+   Uint16 src_format, Uint8 src_channels, int src_rate,
+   Uint16 dst_format, Uint8 dst_channels, int dst_rate );
+
+#endif /* _INCLUDE_AUDIO_CONVERT_H_ */
+