From: John Koleszar Date: Mon, 15 Apr 2013 20:18:24 +0000 (-0700) Subject: Removing rounding from UV MV calculation X-Git-Tag: v1.3.0~1106^2~209^2 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2987fa1dc130256562e661bafb0136ac9b704abf;p=libvpx Removing rounding from UV MV calculation Consider the previous behavior for the MV 1 3/8 (11/8 pel). In the existing code, the fractional part of the MV is considered separately, and rounded is applied, giving a result of 6/8. Rounding is not required in this case, as we're increasing the precision from a q3 to a q4, and the correct value 11/16 can be represented exactly. Slight gain observed (+.033 average on derf) Change-Id: I320e160e8b12f1dd66aa0ce7966b5088870fe9f8 --- diff --git a/vp9/common/vp9_reconinter.c b/vp9/common/vp9_reconinter.c index 002e6eb05..64929c1bc 100644 --- a/vp9/common/vp9_reconinter.c +++ b/vp9/common/vp9_reconinter.c @@ -363,21 +363,18 @@ void vp9_build_inter_predictor(const uint8_t *src, int src_stride, */ void vp9_build_inter_predictor_q4(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, - const int_mv *fullpel_mv_q3, - const int_mv *frac_mv_q4, + const int_mv *mv_q4, const struct scale_factors *scale, int w, int h, int weight, const struct subpix_fn_table *subpix) { - const int mv_row_q4 = ((fullpel_mv_q3->as_mv.row >> 3) << 4) - + (frac_mv_q4->as_mv.row & 0xf); - const int mv_col_q4 = ((fullpel_mv_q3->as_mv.col >> 3) << 4) - + (frac_mv_q4->as_mv.col & 0xf); const int scaled_mv_row_q4 = - scale->scale_motion_vector_component_q4(mv_row_q4, scale->y_num, - scale->y_den, scale->y_offset_q4); + scale->scale_motion_vector_component_q4(mv_q4->as_mv.row, + scale->y_num, scale->y_den, + scale->y_offset_q4); const int scaled_mv_col_q4 = - scale->scale_motion_vector_component_q4(mv_col_q4, scale->x_num, - scale->x_den, scale->x_offset_q4); + scale->scale_motion_vector_component_q4(mv_q4->as_mv.col, + scale->x_num, scale->x_den, + scale->x_offset_q4); const int subpel_x = scaled_mv_col_q4 & 15; const int subpel_y = scaled_mv_row_q4 & 15; @@ -973,30 +970,14 @@ static void build_inter16x16_predictors_mbuv_w(MACROBLOCKD *xd, uint8_t *uptr, *vptr; int pre_stride = which_mv ? xd->second_pre.uv_stride : xd->pre.uv_stride; - int_mv _o16x16mv; - int_mv _16x16mv; + int_mv mv; struct scale_factors *scale = &xd->scale_factor_uv[which_mv]; + mv.as_int = xd->mode_info_context->mbmi.mv[which_mv].as_int; - _16x16mv.as_int = xd->mode_info_context->mbmi.mv[which_mv].as_int; if (clamp_mvs) - clamp_mv_to_umv_border(&_16x16mv.as_mv, xd); - - _o16x16mv = _16x16mv; - /* calc uv motion vectors */ - if (_16x16mv.as_mv.row < 0) - _16x16mv.as_mv.row -= 1; - else - _16x16mv.as_mv.row += 1; - - if (_16x16mv.as_mv.col < 0) - _16x16mv.as_mv.col -= 1; - else - _16x16mv.as_mv.col += 1; - - _16x16mv.as_mv.row /= 2; - _16x16mv.as_mv.col /= 2; + clamp_mv_to_umv_border(&mv.as_mv, xd); uptr = (which_mv ? xd->second_pre.u_buffer : xd->pre.u_buffer); vptr = (which_mv ? xd->second_pre.v_buffer : xd->pre.v_buffer); @@ -1004,11 +985,11 @@ static void build_inter16x16_predictors_mbuv_w(MACROBLOCKD *xd, scale->set_scaled_offsets(scale, mb_row * 16, mb_col * 16); vp9_build_inter_predictor_q4( - uptr, pre_stride, dst_u, dst_uvstride, &_16x16mv, &_o16x16mv, + uptr, pre_stride, dst_u, dst_uvstride, &mv, scale, 8, 8, which_mv ? weight : 0, &xd->subpix); vp9_build_inter_predictor_q4( - vptr, pre_stride, dst_v, dst_uvstride, &_16x16mv, &_o16x16mv, + vptr, pre_stride, dst_v, dst_uvstride, &mv, scale, 8, 8, which_mv ? weight : 0, &xd->subpix); } } @@ -1046,30 +1027,14 @@ void vp9_build_inter16x16_predictors_mbuv(MACROBLOCKD *xd, uint8_t *uptr, *vptr; int pre_stride = which_mv ? xd->second_pre.uv_stride : xd->pre.uv_stride; - int_mv _o16x16mv; - int_mv _16x16mv; + int_mv mv; struct scale_factors *scale = &xd->scale_factor_uv[which_mv]; + mv.as_int = xd->mode_info_context->mbmi.mv[which_mv].as_int; - _16x16mv.as_int = xd->mode_info_context->mbmi.mv[which_mv].as_int; if (clamp_mvs) - clamp_mv_to_umv_border(&_16x16mv.as_mv, xd); - - _o16x16mv = _16x16mv; - /* calc uv motion vectors */ - if (_16x16mv.as_mv.row < 0) - _16x16mv.as_mv.row -= 1; - else - _16x16mv.as_mv.row += 1; - - if (_16x16mv.as_mv.col < 0) - _16x16mv.as_mv.col -= 1; - else - _16x16mv.as_mv.col += 1; - - _16x16mv.as_mv.row /= 2; - _16x16mv.as_mv.col /= 2; + clamp_mv_to_umv_border(&mv.as_mv, xd); uptr = (which_mv ? xd->second_pre.u_buffer : xd->pre.u_buffer); vptr = (which_mv ? xd->second_pre.v_buffer : xd->pre.v_buffer); @@ -1077,12 +1042,12 @@ void vp9_build_inter16x16_predictors_mbuv(MACROBLOCKD *xd, scale->set_scaled_offsets(scale, mb_row * 16, mb_col * 16); vp9_build_inter_predictor_q4( - uptr, pre_stride, dst_u, dst_uvstride, &_16x16mv, &_o16x16mv, + uptr, pre_stride, dst_u, dst_uvstride, &mv, scale, 8, 8, which_mv << (2 * CONFIG_IMPLICIT_COMPOUNDINTER_WEIGHT), &xd->subpix); vp9_build_inter_predictor_q4( - vptr, pre_stride, dst_v, dst_uvstride, &_16x16mv, &_o16x16mv, + vptr, pre_stride, dst_v, dst_uvstride, &mv, scale, 8, 8, which_mv << (2 * CONFIG_IMPLICIT_COMPOUNDINTER_WEIGHT), &xd->subpix); } diff --git a/vp9/common/vp9_reconinter.h b/vp9/common/vp9_reconinter.h index 77fa9ab3f..38981e9c1 100644 --- a/vp9/common/vp9_reconinter.h +++ b/vp9/common/vp9_reconinter.h @@ -67,8 +67,7 @@ void vp9_build_inter_predictor(const uint8_t *src, int src_stride, void vp9_build_inter_predictor_q4(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, - const int_mv *fullpel_mv_q3, - const int_mv *frac_mv_q4, + const int_mv *mv_q4, const struct scale_factors *scale, int w, int h, int do_avg, const struct subpix_fn_table *subpix); diff --git a/vp9/encoder/vp9_temporal_filter.c b/vp9/encoder/vp9_temporal_filter.c index cf84fa1e5..6149518ca 100644 --- a/vp9/encoder/vp9_temporal_filter.c +++ b/vp9/encoder/vp9_temporal_filter.c @@ -41,18 +41,14 @@ static void temporal_filter_predictors_mb_c(MACROBLOCKD *xd, int mv_col, uint8_t *pred) { const int which_mv = 0; - int_mv subpel_mv; - int_mv fullpel_mv; + int_mv mv; - subpel_mv.as_mv.row = mv_row; - subpel_mv.as_mv.col = mv_col; - // TODO(jkoleszar): Make this rounding consistent with the rest of the code - fullpel_mv.as_mv.row = (mv_row >> 1) & ~7; - fullpel_mv.as_mv.col = (mv_col >> 1) & ~7; + mv.as_mv.row = mv_row; + mv.as_mv.col = mv_col; vp9_build_inter_predictor(y_mb_ptr, stride, &pred[0], 16, - &subpel_mv, + &mv, &xd->scale_factor[which_mv], 16, 16, which_mv << @@ -63,7 +59,7 @@ static void temporal_filter_predictors_mb_c(MACROBLOCKD *xd, vp9_build_inter_predictor_q4(u_mb_ptr, stride, &pred[256], 8, - &fullpel_mv, &subpel_mv, + &mv, &xd->scale_factor_uv[which_mv], 8, 8, which_mv << @@ -72,7 +68,7 @@ static void temporal_filter_predictors_mb_c(MACROBLOCKD *xd, vp9_build_inter_predictor_q4(v_mb_ptr, stride, &pred[320], 8, - &fullpel_mv, &subpel_mv, + &mv, &xd->scale_factor_uv[which_mv], 8, 8, which_mv <<