--- uae/src/include/audio.h	2018/04/24 17:16:57	1.1.1.9
+++ uae/src/include/audio.h	2018/04/24 17:18:46	1.1.1.10
@@ -8,12 +8,12 @@
 
 #define PERIOD_MAX ULONG_MAX
 
-extern void AUDxDAT (unsigned int nr, uae_u16 value);
-extern void AUDxVOL (unsigned int nr, uae_u16 value);
-extern void AUDxPER (unsigned int nr, uae_u16 value);
-extern void AUDxLCH (unsigned int nr, uae_u16 value);
-extern void AUDxLCL (unsigned int nr, uae_u16 value);
-extern void AUDxLEN (unsigned int nr, uae_u16 value);
+extern void AUDxDAT (int nr, uae_u16 value);
+extern void AUDxVOL (int nr, uae_u16 value);
+extern void AUDxPER (int nr, uae_u16 value);
+extern void AUDxLCH (int nr, uae_u16 value);
+extern void AUDxLCL (int nr, uae_u16 value);
+extern void AUDxLEN (int nr, uae_u16 value);
 
 extern int init_audio (void);
 extern void ahi_install (void);
@@ -24,3 +24,33 @@ extern void audio_evhandler (void);
 extern void audio_hsync (int);
 extern void update_adkmasks (void);
 extern void update_sound (unsigned int freq);
+extern void led_filter_audio (void);
+
+/* Must match the stereomode array in cfgfile.c.  */
+enum {
+    SND_MONO, SND_STEREO, SND_NONE
+};
+
+STATIC_INLINE int get_audio_nativechannels (void)
+{
+    int ch[] = { 1, 2, 0 };
+    return ch[currprefs.sound_stereo];
+}
+
+STATIC_INLINE int get_audio_amigachannels (void)
+{
+    int ch[] = { 1, 2, 0 };
+    return ch[currprefs.sound_stereo];
+}
+
+STATIC_INLINE int get_audio_ismono (void)
+{
+    if (currprefs.sound_stereo == 0)
+	return 1;
+    return 0;
+}
+
+#define SOUND_MAX_DELAY_BUFFER 1024
+#define SOUND_MAX_LOG_DELAY 10
+#define MIXED_STEREO_MAX 16
+#define MIXED_STEREO_SCALE 32