diff -r 000000000000 -r 6474c204b198 media/libvpx/vp9/common/vp9_reconinter.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/media/libvpx/vp9/common/vp9_reconinter.c Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,245 @@ +/* + * 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" + +void vp9_setup_interp_filters(MACROBLOCKD *xd, + INTERPOLATION_TYPE mcomp_filter_type, + VP9_COMMON *cm) { + if (xd->mi_8x8 && xd->mi_8x8[0]) { + MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi; + + set_scale_factors(xd, mbmi->ref_frame[0] - LAST_FRAME, + mbmi->ref_frame[1] - LAST_FRAME, + cm->active_ref_scale); + } else { + set_scale_factors(xd, -1, -1, cm->active_ref_scale); + } + + xd->subpix.filter_x = xd->subpix.filter_y = + vp9_get_filter_kernel(mcomp_filter_type == SWITCHABLE ? + EIGHTTAP : mcomp_filter_type); + + assert(((intptr_t)xd->subpix.filter_x & 0xff) == 0); +} + +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); + } +} +