diff options
-rw-r--r-- | libvpx/vp8/encoder/mcomp.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/libvpx/vp8/encoder/mcomp.c b/libvpx/vp8/encoder/mcomp.c index 768c764ce..3d1b4df72 100644 --- a/libvpx/vp8/encoder/mcomp.c +++ b/libvpx/vp8/encoder/mcomp.c @@ -27,26 +27,34 @@ static int mv_ref_ct [31] [4] [2]; static int mv_mode_cts [4] [2]; #endif -int vp8_mv_bit_cost(int_mv *mv, int_mv *ref, int *mvcost[2], int Weight) -{ - /* MV costing is based on the distribution of vectors in the previous - * frame and as such will tend to over state the cost of vectors. In - * addition coding a new vector can have a knock on effect on the cost - * of subsequent vectors and the quality of prediction from NEAR and - * NEAREST for subsequent blocks. The "Weight" parameter allows, to a - * limited extent, for some account to be taken of these factors. - */ - return ((mvcost[0][(mv->as_mv.row - ref->as_mv.row) >> 1] + mvcost[1][(mv->as_mv.col - ref->as_mv.col) >> 1]) * Weight) >> 7; +int vp8_mv_bit_cost(int_mv *mv, int_mv *ref, int *mvcost[2], int Weight) { + /* MV costing is based on the distribution of vectors in the previous + * frame and as such will tend to over state the cost of vectors. In + * addition coding a new vector can have a knock on effect on the cost + * of subsequent vectors and the quality of prediction from NEAR and + * NEAREST for subsequent blocks. The "Weight" parameter allows, to a + * limited extent, for some account to be taken of these factors. + */ + const int mv_idx_row = + clamp((mv->as_mv.row - ref->as_mv.row) >> 1, 0, MVvals); + const int mv_idx_col = + clamp((mv->as_mv.col - ref->as_mv.col) >> 1, 0, MVvals); + return ((mvcost[0][mv_idx_row] + mvcost[1][mv_idx_col]) * Weight) >> 7; } -static int mv_err_cost(int_mv *mv, int_mv *ref, int *mvcost[2], int error_per_bit) -{ - /* Ignore mv costing if mvcost is NULL */ - if (mvcost) - return ((mvcost[0][(mv->as_mv.row - ref->as_mv.row) >> 1] + - mvcost[1][(mv->as_mv.col - ref->as_mv.col) >> 1]) - * error_per_bit + 128) >> 8; - return 0; +static int mv_err_cost(int_mv *mv, int_mv *ref, int *mvcost[2], + int error_per_bit) { + /* Ignore mv costing if mvcost is NULL */ + if (mvcost) { + const int mv_idx_row = + clamp((mv->as_mv.row - ref->as_mv.row) >> 1, 0, MVvals); + const int mv_idx_col = + clamp((mv->as_mv.col - ref->as_mv.col) >> 1, 0, MVvals); + return ((mvcost[0][mv_idx_row] + mvcost[1][mv_idx_col]) * error_per_bit + + 128) >> + 8; + } + return 0; } static int mvsad_err_cost(int_mv *mv, int_mv *ref, int *mvsadcost[2], int error_per_bit) |