Add cleaned-up xDuoo X3 support

Cleaned up, rebased, and forward-ported from the xvortex fork.

(original credit to vsoftster@gmail.com)

Change-Id: Ibcc023a0271ea81e901450a88317708c2683236d
Signed-off-by: Solomon Peachy <pizza@shaftnet.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/drivers/audio/sdl.c b/firmware/drivers/audio/sdl.c
index ae66380d16..a8fd2ffa07 100644
--- a/firmware/drivers/audio/sdl.c
+++ b/firmware/drivers/audio/sdl.c
@@ -122,6 +122,10 @@ void audiohw_set_depth_3d(int value)
 void audiohw_set_lineout_volume(int vol_l, int vol_r)
     { (void)vol_l; (void)vol_r; }
 #endif
+#if defined(AUDIOHW_HAVE_FILTER_ROLL_OFF)
+void audiohw_set_filter_roll_off(int value)
+    { (void)value; }
+#endif
 
 void audiohw_close(void) {}