Store first pass motion vector directions

Re-organize the one-byte structure for 16x16 first pass
block. Add bits to indicate motion vector directions.

Change-Id: Id10754ba343dfc712c7fed5bcc85c67fa0bbcb89

3 files changed, 46 insertions, 43 deletions

diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index 74eaae536..95e6dbeb7 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -2087,10 +2087,10 @@ static void rd_pick_partition(VP9_COMP *cpi, const TileInfo *const tile,
           for (r = mb_row; r < mb_row_end; r++) {
             for (c = mb_col; c < mb_col_end; c++) {
               const int mb_index = r * cm->mb_cols + c;
-              if ((cpi->twopass.this_frame_mb_stats[mb_index] &
-                   FPMB_NONZERO_MOTION_MASK) ||
+              if (!(cpi->twopass.this_frame_mb_stats[mb_index] &
+                    FPMB_MOTION_ZERO_MASK) ||
                   !(cpi->twopass.this_frame_mb_stats[mb_index] &
-                    FPMB_ERROR_LEVEL0_MASK)) {
+                    FPMB_ERROR_SMALL_MASK)) {
                 skip = 0;
                 break;
               }
diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c
index 1b574758b..e21ce2354 100644
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -709,18 +709,11 @@ void vp9_first_pass(VP9_COMP *cpi) {
           // intra predication statistics
           cpi->twopass.frame_mb_stats_buf[mb_index] = 0;
           cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_DCINTRA_MASK;
-          cpi->twopass.frame_mb_stats_buf[mb_index] &=
-              ~FPMB_NONZERO_MOTION_MASK;
-          if (this_error > FPMB_ERROR_LEVEL4_TH) {
-            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LEVEL4_MASK;
-          } else if (this_error > FPMB_ERROR_LEVEL3_TH) {
-            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LEVEL3_MASK;
-          } else if (this_error > FPMB_ERROR_LEVEL2_TH) {
-            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LEVEL2_MASK;
-          } else if (this_error > FPMB_ERROR_LEVEL1_TH) {
-            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LEVEL1_MASK;
-          } else {
-            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LEVEL0_MASK;
+          cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK;
+          if (this_error > FPMB_ERROR_LARGE_TH) {
+            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LARGE_MASK;
+          } else if (this_error < FPMB_ERROR_SMALL_TH) {
+            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_SMALL_MASK;
           }
         }
 #endif
@@ -758,23 +751,13 @@ void vp9_first_pass(VP9_COMP *cpi) {
             // inter predication statistics
             cpi->twopass.frame_mb_stats_buf[mb_index] = 0;
             cpi->twopass.frame_mb_stats_buf[mb_index] &= ~FPMB_DCINTRA_MASK;
-            cpi->twopass.frame_mb_stats_buf[mb_index] &=
-                ~FPMB_NONZERO_MOTION_MASK;
-            if (this_error > FPMB_ERROR_LEVEL4_TH) {
-              cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_ERROR_LEVEL4_MASK;
-            } else if (this_error > FPMB_ERROR_LEVEL3_TH) {
-              cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_ERROR_LEVEL3_MASK;
-            } else if (this_error > FPMB_ERROR_LEVEL2_TH) {
+            cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK;
+            if (this_error > FPMB_ERROR_LARGE_TH) {
               cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_ERROR_LEVEL2_MASK;
-            } else if (this_error > FPMB_ERROR_LEVEL1_TH) {
+                  FPMB_ERROR_LARGE_MASK;
+            } else if (this_error < FPMB_ERROR_SMALL_TH) {
               cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_ERROR_LEVEL1_MASK;
-            } else {
-              cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_ERROR_LEVEL0_MASK;
+                  FPMB_ERROR_SMALL_MASK;
             }
           }
 #endif
@@ -784,8 +767,28 @@ void vp9_first_pass(VP9_COMP *cpi) {
 
 #if CONFIG_FP_MB_STATS
             if (cpi->use_fp_mb_stats) {
-              cpi->twopass.frame_mb_stats_buf[mb_index] |=
-                  FPMB_NONZERO_MOTION_MASK;
+              cpi->twopass.frame_mb_stats_buf[mb_index] &=
+                  ~FPMB_MOTION_ZERO_MASK;
+              // check estimated motion direction
+              if (mv.as_mv.col > 0 && mv.as_mv.col >= abs(mv.as_mv.row)) {
+                // right direction
+                cpi->twopass.frame_mb_stats_buf[mb_index] |=
+                    FPMB_MOTION_RIGHT_MASK;
+              } else if (mv.as_mv.row < 0 &&
+                         abs(mv.as_mv.row) >= abs(mv.as_mv.col)) {
+                // up direction
+                cpi->twopass.frame_mb_stats_buf[mb_index] |=
+                    FPMB_MOTION_UP_MASK;
+              } else if (mv.as_mv.col < 0 &&
+                         abs(mv.as_mv.col) >= abs(mv.as_mv.row)) {
+                // left direction
+                cpi->twopass.frame_mb_stats_buf[mb_index] |=
+                    FPMB_MOTION_LEFT_MASK;
+              } else {
+                // down direction
+                cpi->twopass.frame_mb_stats_buf[mb_index] |=
+                    FPMB_MOTION_DOWN_MASK;
+              }
             }
 #endif
 
diff --git a/vp9/encoder/vp9_firstpass.h b/vp9/encoder/vp9_firstpass.h
index e898abc16..bf8c9fd96 100644
--- a/vp9/encoder/vp9_firstpass.h
+++ b/vp9/encoder/vp9_firstpass.h
@@ -21,17 +21,17 @@ extern "C" {
 #if CONFIG_FP_MB_STATS
 
 #define FPMB_DCINTRA_MASK 0x01
-#define FPMB_NONZERO_MOTION_MASK 0x02
-#define FPMB_ERROR_LEVEL0_MASK 0x04
-#define FPMB_ERROR_LEVEL1_MASK 0x10
-#define FPMB_ERROR_LEVEL2_MASK 0x20
-#define FPMB_ERROR_LEVEL3_MASK 0x40
-#define FPMB_ERROR_LEVEL4_MASK 0x80
-
-#define FPMB_ERROR_LEVEL1_TH 2000
-#define FPMB_ERROR_LEVEL2_TH 8000
-#define FPMB_ERROR_LEVEL3_TH 24000
-#define FPMB_ERROR_LEVEL4_TH 48000
+
+#define FPMB_MOTION_ZERO_MASK 0x02
+#define FPMB_MOTION_LEFT_MASK 0x04
+#define FPMB_MOTION_RIGHT_MASK 0x08
+#define FPMB_MOTION_UP_MASK 0x10
+#define FPMB_MOTION_DOWN_MASK 0x20
+
+#define FPMB_ERROR_SMALL_MASK 0x40
+#define FPMB_ERROR_LARGE_MASK 0x80
+#define FPMB_ERROR_SMALL_TH 2000
+#define FPMB_ERROR_LARGE_TH 48000
 
 typedef struct {
   uint8_t *mb_stats_start;