Clean up redundant code in convolve.c

Change-Id: Id3936ffd8146c6806fbe93a5bebc23bf5cd8b5f5

av1/common/convolve.c

diff --git a/av1/common/convolve.c b/av1/common/convolve.c
index fc464a3..1e87729 100644
--- a/av1/common/convolve.c
+++ b/av1/common/convolve.c
@@ -213,13 +213,8 @@
     if (filter_params_y.taps < filter_params_x.taps) {
       int intermediate_width;
       int temp_stride = max_intermediate_size;
-#if CONFIG_DUAL_FILTER
       filter_params = filter_params_y;
       filter_size = filter_params_x.taps;
-#else
-      filter_params = av1_get_interp_filter_params(interp_filter);
-      filter_size = filter_params.taps;
-#endif
       intermediate_width =
           (((w - 1) * x_step_q4 + subpel_x_q4) >> SUBPEL_BITS) + filter_size;
       assert(intermediate_width <= max_intermediate_size);
@@ -230,18 +225,14 @@
                                temp_stride, intermediate_width, h,
                                filter_params, subpel_y_q4, y_step_q4, 0);
 
-#if CONFIG_DUAL_FILTER
       filter_params = filter_params_x;
-#else
-      filter_params = av1_get_interp_filter_params(interp_filter);
-#endif
       assert(filter_params.taps <= MAX_FILTER_TAP);
 
       av1_convolve_horiz_facade(temp + (filter_size / 2 - 1), temp_stride, dst,
                                 dst_stride, w, h, filter_params, subpel_x_q4,
                                 x_step_q4, ref_idx);
     } else
-#endif
+#endif  // CONFIG_DUAL_FILTER
     {
       int intermediate_height;
       int temp_stride = MAX_SB_SIZE;
@@ -266,8 +257,6 @@
 
 #if CONFIG_DUAL_FILTER
       filter_params = filter_params_y;
-#else
-      filter_params = av1_get_interp_filter_params(interp_filter);
 #endif
       assert(filter_params.taps <= MAX_FILTER_TAP);
 
@@ -462,44 +451,50 @@
                                     filter_params, subpel_y_q4, y_step_q4,
                                     ref_idx, bd);
   } else {
-    // temp's size is set to (maximum possible intermediate_height) *
-    // MAX_BLOCK_WIDTH
-    uint16_t temp[((((MAX_BLOCK_HEIGHT - 1) * MAX_STEP + 15) >> SUBPEL_BITS) +
-                   MAX_FILTER_TAP) *
-                  MAX_BLOCK_WIDTH];
-    uint8_t *temp8 = CONVERT_TO_BYTEPTR(temp);
-    int temp_stride = MAX_BLOCK_WIDTH;
+#if CONFIG_DUAL_FILTER
+    if (filter_params_y.taps < filter_params_x.taps) {
+    } else
+#endif  // CONFIG_DUAL_FILTER
+    {
+      // temp's size is set to (maximum possible intermediate_height) *
+      // MAX_BLOCK_WIDTH
+      uint16_t temp[((((MAX_BLOCK_HEIGHT - 1) * MAX_STEP + 15) >> SUBPEL_BITS) +
+                     MAX_FILTER_TAP) *
+                    MAX_BLOCK_WIDTH];
+      uint8_t *temp8 = CONVERT_TO_BYTEPTR(temp);
+      int temp_stride = MAX_BLOCK_WIDTH;
 
 #if CONFIG_DUAL_FILTER
-    InterpFilterParams filter_params_x =
-        av1_get_interp_filter_params(interp_filter[1 + 2 * ref_idx]);
-    InterpFilterParams filter_params_y =
-        av1_get_interp_filter_params(interp_filter[0 + 2 * ref_idx]);
-    InterpFilterParams filter_params = filter_params_x;
-    int filter_size = filter_params_y.taps;
+      InterpFilterParams filter_params_x =
+          av1_get_interp_filter_params(interp_filter[1 + 2 * ref_idx]);
+      InterpFilterParams filter_params_y =
+          av1_get_interp_filter_params(interp_filter[0 + 2 * ref_idx]);
+      InterpFilterParams filter_params = filter_params_x;
+      int filter_size = filter_params_y.taps;
 #else
-    InterpFilterParams filter_params =
-        av1_get_interp_filter_params(interp_filter);
-    int filter_size = filter_params.taps;
+      InterpFilterParams filter_params =
+          av1_get_interp_filter_params(interp_filter);
+      int filter_size = filter_params.taps;
 #endif
 
-    int intermediate_height =
-        (((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
+      int intermediate_height =
+          (((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
 
-    av1_highbd_convolve_horiz_facade(src8 - src_stride * (filter_size / 2 - 1),
-                                     src_stride, temp8, temp_stride, w,
-                                     intermediate_height, filter_params,
-                                     subpel_x_q4, x_step_q4, 0, bd);
+      av1_highbd_convolve_horiz_facade(
+          src8 - src_stride * (filter_size / 2 - 1), src_stride, temp8,
+          temp_stride, w, intermediate_height, filter_params, subpel_x_q4,
+          x_step_q4, 0, bd);
 
 #if CONFIG_DUAL_FILTER
-    filter_params = filter_params_y;
+      filter_params = filter_params_y;
 #endif
-    filter_size = filter_params.taps;
-    assert(filter_params.taps <= MAX_FILTER_TAP);
+      filter_size = filter_params.taps;
+      assert(filter_params.taps <= MAX_FILTER_TAP);
 
-    av1_highbd_convolve_vert_facade(
-        temp8 + temp_stride * (filter_size / 2 - 1), temp_stride, dst8,
-        dst_stride, w, h, filter_params, subpel_y_q4, y_step_q4, ref_idx, bd);
+      av1_highbd_convolve_vert_facade(
+          temp8 + temp_stride * (filter_size / 2 - 1), temp_stride, dst8,
+          dst_stride, w, h, filter_params, subpel_y_q4, y_step_q4, ref_idx, bd);
+    }
   }
 }
 #endif  // CONFIG_AOM_HIGHBITDEPTH