/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include #include "./vpx_scale_rtcd.h" #include "./vpx_config.h" #include "vpx/vpx_integer.h" #include "vp9/common/vp9_blockd.h" #include "vp9/common/vp9_filter.h" #include "vp9/common/vp9_reconinter.h" #include "vp9/common/vp9_reconintra.h" static void inter_predictor(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, const MV32 *mv, const struct scale_factors *scale, int w, int h, int ref, const struct subpix_fn_table *subpix, int xs, int ys) { const int subpel_x = mv->col & SUBPEL_MASK; const int subpel_y = mv->row & SUBPEL_MASK; src += (mv->row >> SUBPEL_BITS) * src_stride + (mv->col >> SUBPEL_BITS); scale->sfc->predict[subpel_x != 0][subpel_y != 0][ref]( src, src_stride, dst, dst_stride, subpix->filter_x[subpel_x], xs, subpix->filter_y[subpel_y], ys, w, h); } void vp9_build_inter_predictor(const uint8_t *src, int src_stride, uint8_t *dst, int dst_stride, const MV *src_mv, const struct scale_factors *scale, int w, int h, int ref, const struct subpix_fn_table *subpix, enum mv_precision precision) { const int is_q4 = precision == MV_PRECISION_Q4; const MV mv_q4 = { is_q4 ? src_mv->row : src_mv->row * 2, is_q4 ? src_mv->col : src_mv->col * 2 }; const struct scale_factors_common *sfc = scale->sfc; const MV32 mv = sfc->scale_mv(&mv_q4, scale); inter_predictor(src, src_stride, dst, dst_stride, &mv, scale, w, h, ref, subpix, sfc->x_step_q4, sfc->y_step_q4); } static INLINE int round_mv_comp_q4(int value) { return (value < 0 ? value - 2 : value + 2) / 4; } static MV mi_mv_pred_q4(const MODE_INFO *mi, int idx) { MV res = { round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.row + mi->bmi[1].as_mv[idx].as_mv.row + mi->bmi[2].as_mv[idx].as_mv.row + mi->bmi[3].as_mv[idx].as_mv.row), round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.col + mi->bmi[1].as_mv[idx].as_mv.col + mi->bmi[2].as_mv[idx].as_mv.col + mi->bmi[3].as_mv[idx].as_mv.col) }; return res; } // TODO(jkoleszar): yet another mv clamping function :-( MV clamp_mv_to_umv_border_sb(const MACROBLOCKD *xd, const MV *src_mv, int bw, int bh, int ss_x, int ss_y) { // If the MV points so far into the UMV border that no visible pixels // are used for reconstruction, the subpel part of the MV can be // discarded and the MV limited to 16 pixels with equivalent results. const int spel_left = (VP9_INTERP_EXTEND + bw) << SUBPEL_BITS; const int spel_right = spel_left - SUBPEL_SHIFTS; const int spel_top = (VP9_INTERP_EXTEND + bh) << SUBPEL_BITS; const int spel_bottom = spel_top - SUBPEL_SHIFTS; MV clamped_mv = { src_mv->row * (1 << (1 - ss_y)), src_mv->col * (1 << (1 - ss_x)) }; assert(ss_x <= 1); assert(ss_y <= 1); clamp_mv(&clamped_mv, xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left, xd->mb_to_right_edge * (1 << (1 - ss_x)) + spel_right, xd->mb_to_top_edge * (1 << (1 - ss_y)) - spel_top, xd->mb_to_bottom_edge * (1 << (1 - ss_y)) + spel_bottom); return clamped_mv; } // TODO(jkoleszar): In principle, pred_w, pred_h are unnecessary, as we could // calculate the subsampled BLOCK_SIZE, but that type isn't defined for // sizes smaller than 16x16 yet. static void build_inter_predictors(MACROBLOCKD *xd, int plane, int block, BLOCK_SIZE bsize, int pred_w, int pred_h, int mi_x, int mi_y) { struct macroblockd_plane *const pd = &xd->plane[plane]; const int bwl = b_width_log2(bsize) - pd->subsampling_x; const int bw = 4 << bwl; const int bh = plane_block_height(bsize, pd); const int x = 4 * (block & ((1 << bwl) - 1)); const int y = 4 * (block >> bwl); const MODE_INFO *mi = xd->mi_8x8[0]; const int is_compound = has_second_ref(&mi->mbmi); int ref; assert(x < bw); assert(y < bh); assert(mi->mbmi.sb_type < BLOCK_8X8 || 4 << pred_w == bw); assert(mi->mbmi.sb_type < BLOCK_8X8 || 4 << pred_h == bh); for (ref = 0; ref < 1 + is_compound; ++ref) { struct scale_factors *const scale = &xd->scale_factor[ref]; struct buf_2d *const pre_buf = &pd->pre[ref]; struct buf_2d *const dst_buf = &pd->dst; uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x; // TODO(jkoleszar): All chroma MVs in SPLITMV mode are taken as the // same MV (the average of the 4 luma MVs) but we could do something // smarter for non-4:2:0. Just punt for now, pending the changes to get // rid of SPLITMV mode entirely. const MV mv = mi->mbmi.sb_type < BLOCK_8X8 ? (plane == 0 ? mi->bmi[block].as_mv[ref].as_mv : mi_mv_pred_q4(mi, ref)) : mi->mbmi.mv[ref].as_mv; // TODO(jkoleszar): This clamping is done in the incorrect place for the // scaling case. It needs to be done on the scaled MV, not the pre-scaling // MV. Note however that it performs the subsampling aware scaling so // that the result is always q4. // mv_precision precision is MV_PRECISION_Q4. const MV mv_q4 = clamp_mv_to_umv_border_sb(xd, &mv, bw, bh, pd->subsampling_x, pd->subsampling_y); uint8_t *pre; MV32 scaled_mv; int xs, ys; if (vp9_is_scaled(scale->sfc)) { pre = pre_buf->buf + scaled_buffer_offset(x, y, pre_buf->stride, scale); scale->sfc->set_scaled_offsets(scale, mi_y + y, mi_x + x); scaled_mv = scale->sfc->scale_mv(&mv_q4, scale); xs = scale->sfc->x_step_q4; ys = scale->sfc->y_step_q4; } else { pre = pre_buf->buf + (y * pre_buf->stride + x); scaled_mv.row = mv_q4.row; scaled_mv.col = mv_q4.col; xs = ys = 16; } inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, &scaled_mv, scale, 4 << pred_w, 4 << pred_h, ref, &xd->subpix, xs, ys); } } static void build_inter_predictors_for_planes(MACROBLOCKD *xd, BLOCK_SIZE bsize, int mi_row, int mi_col, int plane_from, int plane_to) { int plane; for (plane = plane_from; plane <= plane_to; ++plane) { const int mi_x = mi_col * MI_SIZE; const int mi_y = mi_row * MI_SIZE; const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x; const int bhl = b_height_log2(bsize) - xd->plane[plane].subsampling_y; if (xd->mi_8x8[0]->mbmi.sb_type < BLOCK_8X8) { int i = 0, x, y; assert(bsize == BLOCK_8X8); for (y = 0; y < 1 << bhl; ++y) for (x = 0; x < 1 << bwl; ++x) build_inter_predictors(xd, plane, i++, bsize, 0, 0, mi_x, mi_y); } else { build_inter_predictors(xd, plane, 0, bsize, bwl, bhl, mi_x, mi_y); } } } void vp9_build_inter_predictors_sby(MACROBLOCKD *xd, int mi_row, int mi_col, BLOCK_SIZE bsize) { build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 0, 0); } void vp9_build_inter_predictors_sbuv(MACROBLOCKD *xd, int mi_row, int mi_col, BLOCK_SIZE bsize) { build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 1, MAX_MB_PLANE - 1); } void vp9_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col, BLOCK_SIZE bsize) { build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 0, MAX_MB_PLANE - 1); } // TODO(dkovalev: find better place for this function) void vp9_setup_scale_factors(VP9_COMMON *cm, int i) { const int ref = cm->active_ref_idx[i]; struct scale_factors *const sf = &cm->active_ref_scale[i]; struct scale_factors_common *const sfc = &cm->active_ref_scale_comm[i]; if (ref >= NUM_YV12_BUFFERS) { vp9_zero(*sf); vp9_zero(*sfc); } else { YV12_BUFFER_CONFIG *const fb = &cm->yv12_fb[ref]; vp9_setup_scale_factors_for_frame(sf, sfc, fb->y_crop_width, fb->y_crop_height, cm->width, cm->height); if (vp9_is_scaled(sfc)) vp9_extend_frame_borders(fb, cm->subsampling_x, cm->subsampling_y); } }