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author | Android Build Merger (Role) <noreply-android-build-merger@google.com> | 2018-03-28 00:28:56 +0000 |
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committer | Android Build Merger (Role) <noreply-android-build-merger@google.com> | 2018-03-28 00:28:56 +0000 |
commit | 4255e4dc7d0a54d111470ca5a195ed70810da64b (patch) | |
tree | 2ac34bc2823d3b18dc101989d929bbefabf8cd05 | |
parent | fc96012207c2ebedcf280ddd2868121edd0034df (diff) | |
parent | b6df494e5d4556f6dcb1d554059ed683837cc2ed (diff) | |
download | libvpx-4255e4dc7d0a54d111470ca5a195ed70810da64b.tar.gz |
[automerger] DO NOT MERGE | libvpx: cherry pick fix to OOB of mv_cost index. am: e18a13c926 am: 4c31a8fb31 am: b0d8cf041a am: b6df494e5d
Change-Id: Iaa0d5e139c78ada4464c318cdaa36f71a4961f9b
-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) |