Pass ConvolveParams into prediction functions

Those functions includes
av1_make_inter_predictor
av1_build_inter_predictor
inter_predictor

Change-Id: Ide3b744277cf30964e8b352fc8de91365d7217a8

av1/common/convolve.h

diff --git a/av1/common/convolve.h b/av1/common/convolve.h
index 673560a..7b4e141 100644
--- a/av1/common/convolve.h
+++ b/av1/common/convolve.h
@@ -17,11 +17,24 @@
 extern "C" {
 #endif
 
+typedef enum CONVOLVE_OPT {
+  // indicate the results in dst buf is rounded by FILTER_BITS or not
+  CONVOLVE_OPT_ROUND,
+  CONVOLVE_OPT_NO_ROUND,
+} CONVOLVE_OPT;
+
 typedef struct ConvolveParams {
   int ref;
-  int round;
+  CONVOLVE_OPT round;
 } ConvolveParams;
 
+static INLINE ConvolveParams get_conv_params(int ref) {
+  ConvolveParams conv_params;
+  conv_params.ref = ref;
+  conv_params.round = CONVOLVE_OPT_ROUND;
+  return conv_params;
+}
+
 void av1_convolve(const uint8_t *src, int src_stride, uint8_t *dst,
                   int dst_stride, int w, int h,
 #if CONFIG_DUAL_FILTER