--- a/src/xmms-sid.h	Sat Dec 25 08:49:02 2004 +0000
+++ b/src/xmms-sid.h	Sat Dec 25 08:50:03 2004 +0000
@@ -191,6 +191,7 @@
 void	xs_about(void);
 
 
+gint	xs_rateconv_filter(void *, void *, gint, gint, gint);
 t_xs_tuneinfo *xs_tuneinfo_new(gchar *, gint, gint, gchar *, gchar *, gchar *, gint, gint, gint, gint);
 void	xs_tuneinfo_free(t_xs_tuneinfo *);
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xs_filter.c	Sat Dec 25 08:50:03 2004 +0000
@@ -0,0 +1,74 @@
+/*  
+   XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS)
+
+   Audio rate-conversion filter
+   
+   Written by Matti "ccr" Hamalainen <ccr@tnsp.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+#include "xmms-sid.h"
+
+/* Let's do some preprocessor magic :) */
+#define XS_FVAR(T, P, K) g ## K ## int ## P *sp_ ## T ## P , *dp_ ## T ## P
+
+#define XS_FILTER1(T, P, K)							\
+	dataSize /= sizeof(g ## K ## int ## P); tmpo_ ## T = 0;			\
+	sp_ ## T ## P = (g ## K ## int ## P *) srcBuf;				\
+	dp_ ## T ## P = (g ## K ## int ## P *) destBuf;				\
+	while (dataSize-- > oversampleFactor) {					\
+		for (tmp_ ## T = 0, i = 0; i < oversampleFactor; i++)		\
+			tmp_ ## T += sp_ ## T ## P [i];				\
+		*(dp_ ## T ## P ++) = tmp_ ## T / (oversampleFactor);		\
+		sp_ ## T ## P ++;						\
+		}
+
+gint xs_rateconv_filter(void *destBuf, void *srcBuf, gint audioFormat, gint oversampleFactor, gint dataSize)
+{
+ guint32 tmp_u, tmpo_u;
+ gint32 tmp_s, tmpo_s;
+ XS_FVAR(u, 8, u);
+ XS_FVAR(s, 8,);
+ XS_FVAR(u, 16, u);
+ XS_FVAR(s, 16,);
+ gint i;
+ 
+ if (dataSize <= 0)
+ 	return dataSize;
+
+ switch (audioFormat) {
+ case FMT_U8:
+ case FMT_S8:
+ 	XS_FILTER1(s, 8,);
+ 	break;
+ 	
+
+ case FMT_U16_BE:
+ case FMT_U16_LE:
+ case FMT_U16_NE:
+ 	
+ case FMT_S16_BE:
+ case FMT_S16_LE:
+ case FMT_S16_NE:
+ 	XS_FILTER1(s, 16,);
+ 	break;
+
+ default:
+ 	return -1;
+ }
+
+ return 0;
+}
+