Add enum definition for subpel search precision

To improve readability.

Change-Id: Idc08b2068c7d8ba9dadc0d559a3b4d61c2a88c94

1 files changed, 6 insertions, 8 deletions

diff --git a/vp9/encoder/vp9_speed_features.h b/vp9/encoder/vp9_speed_features.h
index 02673e602..9b09ec474 100644
--- a/vp9/encoder/vp9_speed_features.h
+++ b/vp9/encoder/vp9_speed_features.h
@@ -167,15 +167,17 @@ typedef enum {
   ONE_LOOP_REDUCED = 1
 } FAST_COEFF_UPDATE;
 
+typedef enum { EIGHTH_PEL, QUARTER_PEL, HALF_PEL, FULL_PEL } SUBPEL_FORCE_STOP;
+
 typedef struct ADAPT_SUBPEL_FORCE_STOP {
   // Threshold for full pixel motion vector;
   int mv_thresh;
 
   // subpel_force_stop if full pixel MV is below the threshold.
-  int force_stop_below;
+  SUBPEL_FORCE_STOP force_stop_below;
 
   // subpel_force_stop if full pixel MV is equal to or above the threshold.
-  int force_stop_above;
+  SUBPEL_FORCE_STOP force_stop_above;
 } ADAPT_SUBPEL_FORCE_STOP;
 
 typedef struct MV_SPEED_FEATURES {
@@ -200,12 +202,8 @@ typedef struct MV_SPEED_FEATURES {
   // extensive subpel search.
   int subpel_search_level;
 
-  // Control when to stop subpel search:
-  // 0: Full subpel search.
-  // 1: Stop at quarter pixel.
-  // 2: Stop at half pixel.
-  // 3: Stop at full pixel.
-  int subpel_force_stop;
+  // When to stop subpel motion search.
+  SUBPEL_FORCE_STOP subpel_force_stop;
 
   // If it's enabled, different subpel_force_stop will be used for different MV.
   int enable_adaptive_subpel_force_stop;