1 files changed, 0 insertions, 32 deletions
diff --git a/filt/filt_5th.c b/filt/filt_5th.c
deleted file mode 100644
index 23d5aab..0000000
--- a/filt/filt_5th.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#include "filt.h"
-
-void f_5th(int16_t *data, int length, int16_t *hist)
-/* for half of interleaved data */
-{
-	int i;
-	int16_t a, b, c, d, e, f;
-	a = hist[1];
-	b = hist[2];
-	c = hist[3];
-	d = hist[4];
-	e = hist[5];
-	f = data[0];
-	/* a downsample should improve resolution, so don't fully shift */
-	data[0] = (a + (b+e)*5 + (c+d)*10 + f) >> 4;
-	for (i=4; i<length; i+=4) {
-		a = c;
-		b = d;
-		c = e;
-		d = f;
-		e = data[i-2];
-		f = data[i];
-		data[i/2] = (a + (b+e)*5 + (c+d)*10 + f) >> 4;
-	}
-	/* archive */
-	hist[0] = a;
-	hist[1] = b;
-	hist[2] = c;
-	hist[3] = d;
-	hist[4] = e;
-	hist[5] = f;
-}