--- src/backends/alc_backend_bsd.c.orig	Thu Jan  5 16:11:20 2006
+++ src/backends/alc_backend_bsd.c	Sun Aug 13 07:39:16 2006
@@ -9,7 +9,10 @@
  */
 #include "al_siteconfig.h"
 
+#define __BSD_VISIBLE 1
+
 #include <AL/al.h>
+#include <AL/alext.h>
 #include <assert.h>
 #include <fcntl.h>
 #include <sys/soundcard.h>
@@ -113,7 +116,6 @@
  */
 static void *grab_write_native(void) {
 	const char *dsppath = "/dev/dsp";
-	int divisor = _alSpot(_AL_DEF_BUFSIZ) | (2<<16);
 
 	dsp_fd = open(dsppath, O_WRONLY | O_NONBLOCK);
 
@@ -126,10 +128,6 @@
 		perror("fcntl");
 	}
 
-	if(ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &divisor) < 0) {
-		perror("ioctl SETFRAGMENT");
-	}
-
 	FD_ZERO(&dsp_fd_set);
 	FD_SET(dsp_fd, &dsp_fd_set);
 
@@ -318,10 +316,12 @@
 }
 
 static ALboolean set_write_native(UNUSED(void *handle),
-				  UNUSED(unsigned int *bufsiz),
+				  unsigned int *bufsiz,
 				  ALenum *fmt,
 				  unsigned int *speed) {
 	ALuint channels = _alGetChannelsFromFormat(*fmt);
+	int divisor;
+	char *custom_bufsiz;
 
 	if(dsp_fd < 0) {
 		return AL_FALSE;
@@ -363,6 +363,28 @@
 
 
 	*fmt = BSD2ALFMT(*fmt, channels);
+
+	custom_bufsiz = getenv("OPENAL_BUFFER_SIZE");
+	if (custom_bufsiz != NULL)
+		*bufsiz = atoi(custom_bufsiz);
+	else {
+		if(ioctl(dsp_fd, SNDCTL_DSP_GETBLKSIZE, bufsiz) < 0) {
+#ifdef DEBUG_MAXIMUS
+			fprintf(stderr, "blksize %d\n", *bufsiz);
+			perror("get_devsp blksize ioctl");
+#endif
+			return AL_FALSE;
+		}
+	}
+
+	divisor = _alSpot(*bufsiz) | (2<<16);
+	if(ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &divisor) < 0) {
+#ifdef DEBUG_MAXIMUS
+		fprintf(stderr, "divisor %d\n", divisor);
+		perror("set_devsp fragment ioctl");
+#endif
+		return AL_FALSE;
+	}
 
 	return AL_TRUE;
 }