diff --git a/vp8/common/filter.c b/vp8/common/filter.c
index bf5cefce7ae3836dbaa65fee1d4a6135ea06273d..2e3acc29ceb492c8ebf9c5ba055af9cfbe9e79d7 100644
--- a/vp8/common/filter.c
+++ b/vp8/common/filter.c
@@ -45,7 +45,7 @@ DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[SUBPEL_SHIFTS][2]) =
};
#if CONFIG_ENHANCED_INTERP
-#define FILTER_ALPHA 60
+#define FILTER_ALPHA 0
DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXTEND]) =
{
/* Generated using MATLAB:
@@ -56,25 +56,7 @@ DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXT
* disp(num2str(ba, '%d,'))
*/
#if SUBPEL_SHIFTS==16
-#if FILTER_ALPHA == 75
- /* alpha = 0.75 */
- { 0, 0, 0, 128, 0, 0, 0, 0},
- {-1, 2, -6, 126, 9, -3, 2, -1},
- {-1, 4, -11, 123, 18, -7, 3, -1},
- {-2, 6, -16, 119, 28, -10, 5, -2},
- {-2, 7, -19, 113, 38, -13, 6, -2},
- {-3, 8, -21, 106, 49, -16, 7, -2},
- {-3, 9, -22, 99, 59, -19, 8, -3},
- {-3, 9, -23, 90, 70, -21, 9, -3},
- {-3, 9, -22, 80, 80, -22, 9, -3},
- {-3, 9, -21, 70, 90, -23, 9, -3},
- {-3, 8, -19, 59, 99, -22, 9, -3},
- {-2, 7, -16, 49, 106, -21, 8, -3},
- {-2, 6, -13, 38, 113, -19, 7, -2},
- {-2, 5, -10, 28, 119, -16, 6, -2},
- {-1, 3, -7, 18, 123, -11, 4, -1},
- {-1, 2, -3, 9, 126, -6, 2, -1}
-#elif FILTER_ALPHA == 70
+#if FILTER_ALPHA == 70
/* alpha = 0.70 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{ 0, 2, -6, 126, 8, -3, 1, 0},
@@ -109,7 +91,7 @@ DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXT
{-1, 5, -13, 38, 112, -17, 5, -1},
{-1, 4, -10, 27, 118, -14, 5, -1},
{-1, 2, -6, 18, 123, -10, 3, -1},
- {0, 1, -3, 8, 126, -6, 2, 0}
+ { 0, 1, -3, 8, 126, -6, 2, 0}
#elif FILTER_ALPHA == 60
/* alpha = 0.60 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
@@ -127,11 +109,11 @@ DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXT
{-1, 4, -12, 38, 112, -17, 5, -1},
{-1, 3, -9, 28, 118, -14, 4, -1},
{-1, 2, -6, 18, 123, -10, 3, -1},
- {0, 1, -3, 8, 126, -6, 2, 0}
+ { 0, 1, -3, 8, 126, -6, 2, 0}
#elif FILTER_ALPHA == 55
/* alpha = 0.55 */
- {0, 0, 0, 128, 0, 0, 0, 0},
- {0, 1, -5, 126, 8, -3, 1, 0},
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 1, -5, 126, 8, -3, 1, 0},
{-1, 2, -10, 123, 18, -6, 2, 0},
{-1, 4, -13, 118, 27, -9, 3, -1},
{-1, 5, -16, 112, 37, -12, 4, -1},
@@ -144,21 +126,47 @@ DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXT
{-1, 4, -14, 48, 105, -18, 5, -1},
{-1, 4, -12, 37, 112, -16, 5, -1},
{-1, 3, -9, 27, 118, -13, 4, -1},
- {0, 2, -6, 18, 123, -10, 2, -1},
- {0, 1, -3, 8, 126, -5, 1, 0}
+ { 0, 2, -6, 18, 123, -10, 2, -1},
+ { 0, 1, -3, 8, 126, -5, 1, 0}
+#elif FILTER_ALPHA == 50
+ /* alpha = 0.50 */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 1, -5, 126, 8, -3, 1, 0},
+ { 0, 2, -10, 122, 18, -6, 2, 0},
+ {-1, 3, -13, 118, 27, -9, 3, 0},
+ {-1, 4, -16, 112, 37, -11, 3, 0},
+ {-1, 5, -17, 104, 48, -14, 4, -1},
+ {-1, 5, -18, 96, 58, -16, 5, -1},
+ {-1, 5, -19, 88, 68, -17, 5, -1},
+ {-1, 5, -18, 78, 78, -18, 5, -1},
+ {-1, 5, -17, 68, 88, -19, 5, -1},
+ {-1, 5, -16, 58, 96, -18, 5, -1},
+ {-1, 4, -14, 48, 104, -17, 5, -1},
+ { 0, 3, -11, 37, 112, -16, 4, -1},
+ { 0, 3, -9, 27, 118, -13, 3, -1},
+ { 0, 2, -6, 18, 122, -10, 2, 0},
+ { 0, 1, -3, 8, 126, -5, 1, 0}
+#elif FILTER_ALPHA == 0
+ /* Lagrangian interpolation filter */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 1, -5, 126, 8, -3, 1, 0},
+ {-1, 3, -10, 122, 18, -6, 2, 0},
+ {-1, 4, -13, 118, 27, -9, 3, -1},
+ {-1, 4, -16, 112, 37, -11, 4, -1},
+ {-1, 5, -18, 105, 48, -14, 4, -1},
+ {-1, 5, -19, 97, 58, -16, 5, -1},
+ {-1, 6, -19, 88, 68, -18, 5, -1},
+ {-1, 6, -19, 78, 78, -19, 6, -1},
+ {-1, 5, -18, 68, 88, -19, 6, -1},
+ {-1, 5, -16, 58, 97, -19, 5, -1},
+ {-1, 4, -14, 48, 105, -18, 5, -1},
+ {-1, 4, -11, 37, 112, -16, 4, -1},
+ {-1, 3, -9, 27, 118, -13, 4, -1},
+ { 0, 2, -6, 18, 122, -10, 3, -1},
+ { 0, 1, -3, 8, 126, -5, 1, 0}
#endif /* FILTER_ALPHA */
#else /* SUBPEL_SHIFTS==16 */
-#if FILTER_ALPHA == 75
- /* alpha = 0.75 */
- { 0, 0, 0, 128, 0, 0, 0, 0},
- {-1, 4, -11, 123, 18, -7, 3, -1},
- {-2, 7, -19, 113, 38, -13, 6, -2},
- {-3, 9, -22, 99, 59, -19, 8, -3},
- {-3, 9, -22, 80, 80, -22, 9, -3},
- {-3, 8, -19, 59, 99, -22, 9, -3},
- {-2, 6, -13, 38, 113, -19, 7, -2},
- {-1, 3, -7, 18, 123, -11, 4, -1}
-#elif FILTER_ALPHA == 70
+#if FILTER_ALPHA == 70
/* alpha = 0.70 */
{ 0, 0, 0, 128, 0, 0, 0, 0},
{-1, 4, -11, 123, 18, -7, 3, -1},
@@ -198,6 +206,26 @@ DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[SUBPEL_SHIFTS][2*INTERP_EXT
{-1, 5, -16, 58, 97, -19, 5, -1},
{-1, 4, -12, 37, 112, -16, 5, -1},
{ 0, 2, -6, 18, 123, -10, 2, -1}
+#elif FILTER_ALPHA == 50
+ /* alpha = 0.50 */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 2, -10, 122, 18, -6, 2, 0},
+ {-1, 4, -16, 112, 37, -11, 3, 0},
+ {-1, 5, -18, 96, 58, -16, 5, -1},
+ {-1, 5, -18, 78, 78, -18, 5, -1},
+ {-1, 5, -16, 58, 96, -18, 5, -1},
+ { 0, 3, -11, 37, 112, -16, 4, -1},
+ { 0, 2, -6, 18, 122, -10, 2, 0}
+#elif FILTER_ALPHA == 0
+ /* Lagrangian interpolation filter */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ {-1, 3, -10, 122, 18, -6, 2, 0},
+ {-1, 4, -16, 112, 37, -11, 4, -1},
+ {-1, 5, -19, 97, 58, -16, 5, -1},
+ {-1, 6, -19, 78, 78, -19, 6, -1},
+ {-1, 5, -16, 58, 97, -19, 5, -1},
+ {-1, 4, -11, 37, 112, -16, 4, -1},
+ { 0, 2, -6, 18, 122, -10, 3, -1},
#endif /* FILTER_ALPHA */
#endif /* SUBPEL_SHIFTS==16 */
};