Use 6-tap filters for smooth and smooth2 filter

Change-Id: I1bf9c2fcd664fb4012d67e420cac613eaca735a8

av1/common/filter.c

@@ -98,28 +98,28 @@ DECLARE_ALIGNED(256, static const int16_t,
 
 DECLARE_ALIGNED(256, static const InterpKernel,
                 sub_pel_filters_8smooth2[SUBPEL_SHIFTS]) = {
-  // freqmultiplier = 0.35
-  { 0, 0, 0, 128, 0, 0, 0, 0 },     { -1, 8, 31, 47, 34, 10, 0, -1 },
-  { -1, 7, 29, 46, 36, 12, 0, -1 }, { -1, 6, 28, 46, 37, 13, 0, -1 },
-  { -1, 5, 26, 46, 38, 14, 1, -1 }, { -1, 4, 25, 45, 39, 16, 1, -1 },
-  { -1, 4, 23, 44, 41, 17, 1, -1 }, { -1, 3, 21, 44, 42, 18, 2, -1 },
-  { -1, 2, 20, 43, 43, 20, 2, -1 }, { -1, 2, 18, 42, 44, 21, 3, -1 },
-  { -1, 1, 17, 41, 44, 23, 4, -1 }, { -1, 1, 16, 39, 45, 25, 4, -1 },
-  { -1, 1, 14, 38, 46, 26, 5, -1 }, { -1, 0, 13, 37, 46, 28, 6, -1 },
-  { -1, 0, 12, 36, 46, 29, 7, -1 }, { -1, 0, 10, 34, 47, 31, 8, -1 },
+  // freqmultiplier = 0.2
+  { 0, 0, 0, 128, 0, 0, 0, 0 },   { 0, 9, 30, 44, 32, 11, 2, 0 },
+  { 0, 8, 28, 44, 34, 12, 2, 0 }, { 0, 7, 27, 44, 35, 13, 2, 0 },
+  { 0, 6, 26, 43, 37, 14, 2, 0 }, { 0, 5, 24, 43, 38, 16, 2, 0 },
+  { 0, 5, 23, 42, 38, 17, 3, 0 }, { 0, 4, 21, 41, 40, 19, 3, 0 },
+  { 0, 4, 20, 40, 40, 20, 4, 0 }, { 0, 3, 19, 40, 41, 21, 4, 0 },
+  { 0, 3, 17, 38, 42, 23, 5, 0 }, { 0, 2, 16, 38, 43, 24, 5, 0 },
+  { 0, 2, 14, 37, 43, 26, 6, 0 }, { 0, 2, 13, 35, 44, 27, 7, 0 },
+  { 0, 2, 12, 34, 44, 28, 8, 0 }, { 0, 2, 11, 32, 44, 30, 9, 0 },
 };
 
 DECLARE_ALIGNED(256, static const InterpKernel,
                 sub_pel_filters_8smooth[SUBPEL_SHIFTS]) = {
-  // freqmultiplier = 0.75
-  { 0, 0, 0, 128, 0, 0, 0, 0 },     { 2, -10, 19, 95, 31, -11, 2, 0 },
-  { 2, -9, 14, 94, 37, -12, 2, 0 }, { 2, -8, 9, 92, 43, -12, 1, 1 },
-  { 2, -7, 5, 90, 49, -12, 1, 0 },  { 2, -5, 1, 86, 55, -12, 0, 1 },
-  { 1, -4, -2, 82, 61, -11, 0, 1 }, { 1, -3, -5, 77, 67, -9, -1, 1 },
-  { 1, -2, -7, 72, 72, -7, -2, 1 }, { 1, -1, -9, 67, 77, -5, -3, 1 },
-  { 1, 0, -11, 61, 82, -2, -4, 1 }, { 1, 0, -12, 55, 86, 1, -5, 2 },
-  { 0, 1, -12, 49, 90, 5, -7, 2 },  { 1, 1, -12, 43, 92, 9, -8, 2 },
-  { 0, 2, -12, 37, 94, 14, -9, 2 }, { 0, 2, -11, 31, 95, 19, -10, 2 },
+  // freqmultiplier = 0.8
+  { 0, 0, 0, 128, 0, 0, 0, 0 },    { 0, -5, 13, 102, 24, -7, 1, 0 },
+  { 0, -4, 8, 100, 31, -8, 1, 0 }, { 0, -3, 4, 97, 37, -8, 1, 0 },
+  { 0, -2, 0, 94, 44, -9, 1, 0 },  { 0, -2, -3, 90, 51, -9, 1, 0 },
+  { 0, -1, -5, 84, 59, -9, 0, 0 }, { 0, 0, -7, 79, 65, -9, 0, 0 },
+  { 0, 0, -8, 72, 72, -8, 0, 0 },  { 0, 0, -9, 65, 79, -7, 0, 0 },
+  { 0, 0, -9, 59, 84, -5, -1, 0 }, { 0, 1, -9, 51, 90, -3, -2, 0 },
+  { 0, 1, -9, 44, 94, 0, -2, 0 },  { 0, 1, -8, 37, 97, 4, -3, 0 },
+  { 0, 1, -8, 31, 100, 8, -4, 0 }, { 0, 1, -7, 24, 102, 13, -5, 0 },
 };
 #else  // CONFIG_DUAL_FILTER