1/* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include <assert.h> 12 13#include "./vpx_scale_rtcd.h" 14#include "./vpx_config.h" 15 16#include "vpx/vpx_integer.h" 17 18#include "vp9/common/vp9_blockd.h" 19#include "vp9/common/vp9_reconinter.h" 20#include "vp9/common/vp9_reconintra.h" 21 22#if CONFIG_VP9_HIGHBITDEPTH 23void high_inter_predictor(const uint8_t *src, int src_stride, 24 uint8_t *dst, int dst_stride, 25 const int subpel_x, 26 const int subpel_y, 27 const struct scale_factors *sf, 28 int w, int h, int ref, 29 const InterpKernel *kernel, 30 int xs, int ys, int bd) { 31 sf->highbd_predict[subpel_x != 0][subpel_y != 0][ref]( 32 src, src_stride, dst, dst_stride, 33 kernel[subpel_x], xs, kernel[subpel_y], ys, w, h, bd); 34} 35 36void vp9_highbd_build_inter_predictor(const uint8_t *src, int src_stride, 37 uint8_t *dst, int dst_stride, 38 const MV *src_mv, 39 const struct scale_factors *sf, 40 int w, int h, int ref, 41 const InterpKernel *kernel, 42 enum mv_precision precision, 43 int x, int y, int bd) { 44 const int is_q4 = precision == MV_PRECISION_Q4; 45 const MV mv_q4 = { is_q4 ? src_mv->row : src_mv->row * 2, 46 is_q4 ? src_mv->col : src_mv->col * 2 }; 47 MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf); 48 const int subpel_x = mv.col & SUBPEL_MASK; 49 const int subpel_y = mv.row & SUBPEL_MASK; 50 51 src += (mv.row >> SUBPEL_BITS) * src_stride + (mv.col >> SUBPEL_BITS); 52 53 high_inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y, 54 sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4, bd); 55} 56#endif // CONFIG_VP9_HIGHBITDEPTH 57 58void vp9_build_inter_predictor(const uint8_t *src, int src_stride, 59 uint8_t *dst, int dst_stride, 60 const MV *src_mv, 61 const struct scale_factors *sf, 62 int w, int h, int ref, 63 const InterpKernel *kernel, 64 enum mv_precision precision, 65 int x, int y) { 66 const int is_q4 = precision == MV_PRECISION_Q4; 67 const MV mv_q4 = { is_q4 ? src_mv->row : src_mv->row * 2, 68 is_q4 ? src_mv->col : src_mv->col * 2 }; 69 MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf); 70 const int subpel_x = mv.col & SUBPEL_MASK; 71 const int subpel_y = mv.row & SUBPEL_MASK; 72 73 src += (mv.row >> SUBPEL_BITS) * src_stride + (mv.col >> SUBPEL_BITS); 74 75 inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y, 76 sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4); 77} 78 79static INLINE int round_mv_comp_q4(int value) { 80 return (value < 0 ? value - 2 : value + 2) / 4; 81} 82 83static MV mi_mv_pred_q4(const MODE_INFO *mi, int idx) { 84 MV res = { round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.row + 85 mi->bmi[1].as_mv[idx].as_mv.row + 86 mi->bmi[2].as_mv[idx].as_mv.row + 87 mi->bmi[3].as_mv[idx].as_mv.row), 88 round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.col + 89 mi->bmi[1].as_mv[idx].as_mv.col + 90 mi->bmi[2].as_mv[idx].as_mv.col + 91 mi->bmi[3].as_mv[idx].as_mv.col) }; 92 return res; 93} 94 95static INLINE int round_mv_comp_q2(int value) { 96 return (value < 0 ? value - 1 : value + 1) / 2; 97} 98 99static MV mi_mv_pred_q2(const MODE_INFO *mi, int idx, int block0, int block1) { 100 MV res = { round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.row + 101 mi->bmi[block1].as_mv[idx].as_mv.row), 102 round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.col + 103 mi->bmi[block1].as_mv[idx].as_mv.col) }; 104 return res; 105} 106 107// TODO(jkoleszar): yet another mv clamping function :-( 108MV clamp_mv_to_umv_border_sb(const MACROBLOCKD *xd, const MV *src_mv, 109 int bw, int bh, int ss_x, int ss_y) { 110 // If the MV points so far into the UMV border that no visible pixels 111 // are used for reconstruction, the subpel part of the MV can be 112 // discarded and the MV limited to 16 pixels with equivalent results. 113 const int spel_left = (VP9_INTERP_EXTEND + bw) << SUBPEL_BITS; 114 const int spel_right = spel_left - SUBPEL_SHIFTS; 115 const int spel_top = (VP9_INTERP_EXTEND + bh) << SUBPEL_BITS; 116 const int spel_bottom = spel_top - SUBPEL_SHIFTS; 117 MV clamped_mv = { 118 src_mv->row * (1 << (1 - ss_y)), 119 src_mv->col * (1 << (1 - ss_x)) 120 }; 121 assert(ss_x <= 1); 122 assert(ss_y <= 1); 123 124 clamp_mv(&clamped_mv, 125 xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left, 126 xd->mb_to_right_edge * (1 << (1 - ss_x)) + spel_right, 127 xd->mb_to_top_edge * (1 << (1 - ss_y)) - spel_top, 128 xd->mb_to_bottom_edge * (1 << (1 - ss_y)) + spel_bottom); 129 130 return clamped_mv; 131} 132 133MV average_split_mvs(const struct macroblockd_plane *pd, 134 const MODE_INFO *mi, int ref, int block) { 135 const int ss_idx = ((pd->subsampling_x > 0) << 1) | (pd->subsampling_y > 0); 136 MV res = {0, 0}; 137 switch (ss_idx) { 138 case 0: 139 res = mi->bmi[block].as_mv[ref].as_mv; 140 break; 141 case 1: 142 res = mi_mv_pred_q2(mi, ref, block, block + 2); 143 break; 144 case 2: 145 res = mi_mv_pred_q2(mi, ref, block, block + 1); 146 break; 147 case 3: 148 res = mi_mv_pred_q4(mi, ref); 149 break; 150 default: 151 assert(ss_idx <= 3 && ss_idx >= 0); 152 } 153 return res; 154} 155 156static void build_inter_predictors(MACROBLOCKD *xd, int plane, int block, 157 int bw, int bh, 158 int x, int y, int w, int h, 159 int mi_x, int mi_y) { 160 struct macroblockd_plane *const pd = &xd->plane[plane]; 161 const MODE_INFO *mi = xd->mi[0]; 162 const int is_compound = has_second_ref(&mi->mbmi); 163 const InterpKernel *kernel = vp9_filter_kernels[mi->mbmi.interp_filter]; 164 int ref; 165 166 for (ref = 0; ref < 1 + is_compound; ++ref) { 167 const struct scale_factors *const sf = &xd->block_refs[ref]->sf; 168 struct buf_2d *const pre_buf = &pd->pre[ref]; 169 struct buf_2d *const dst_buf = &pd->dst; 170 uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x; 171 const MV mv = mi->mbmi.sb_type < BLOCK_8X8 172 ? average_split_mvs(pd, mi, ref, block) 173 : mi->mbmi.mv[ref].as_mv; 174 175 // TODO(jkoleszar): This clamping is done in the incorrect place for the 176 // scaling case. It needs to be done on the scaled MV, not the pre-scaling 177 // MV. Note however that it performs the subsampling aware scaling so 178 // that the result is always q4. 179 // mv_precision precision is MV_PRECISION_Q4. 180 const MV mv_q4 = clamp_mv_to_umv_border_sb(xd, &mv, bw, bh, 181 pd->subsampling_x, 182 pd->subsampling_y); 183 184 uint8_t *pre; 185 MV32 scaled_mv; 186 int xs, ys, subpel_x, subpel_y; 187 const int is_scaled = vp9_is_scaled(sf); 188 189 if (is_scaled) { 190 pre = pre_buf->buf + scaled_buffer_offset(x, y, pre_buf->stride, sf); 191 scaled_mv = vp9_scale_mv(&mv_q4, mi_x + x, mi_y + y, sf); 192 xs = sf->x_step_q4; 193 ys = sf->y_step_q4; 194 } else { 195 pre = pre_buf->buf + (y * pre_buf->stride + x); 196 scaled_mv.row = mv_q4.row; 197 scaled_mv.col = mv_q4.col; 198 xs = ys = 16; 199 } 200 subpel_x = scaled_mv.col & SUBPEL_MASK; 201 subpel_y = scaled_mv.row & SUBPEL_MASK; 202 pre += (scaled_mv.row >> SUBPEL_BITS) * pre_buf->stride 203 + (scaled_mv.col >> SUBPEL_BITS); 204 205#if CONFIG_VP9_HIGHBITDEPTH 206 if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { 207 high_inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, 208 subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys, 209 xd->bd); 210 } else { 211 inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, 212 subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys); 213 } 214#else 215 inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, 216 subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys); 217#endif // CONFIG_VP9_HIGHBITDEPTH 218 } 219} 220 221static void build_inter_predictors_for_planes(MACROBLOCKD *xd, BLOCK_SIZE bsize, 222 int mi_row, int mi_col, 223 int plane_from, int plane_to) { 224 int plane; 225 const int mi_x = mi_col * MI_SIZE; 226 const int mi_y = mi_row * MI_SIZE; 227 for (plane = plane_from; plane <= plane_to; ++plane) { 228 const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, 229 &xd->plane[plane]); 230 const int num_4x4_w = num_4x4_blocks_wide_lookup[plane_bsize]; 231 const int num_4x4_h = num_4x4_blocks_high_lookup[plane_bsize]; 232 const int bw = 4 * num_4x4_w; 233 const int bh = 4 * num_4x4_h; 234 235 if (xd->mi[0]->mbmi.sb_type < BLOCK_8X8) { 236 int i = 0, x, y; 237 assert(bsize == BLOCK_8X8); 238 for (y = 0; y < num_4x4_h; ++y) 239 for (x = 0; x < num_4x4_w; ++x) 240 build_inter_predictors(xd, plane, i++, bw, bh, 241 4 * x, 4 * y, 4, 4, mi_x, mi_y); 242 } else { 243 build_inter_predictors(xd, plane, 0, bw, bh, 244 0, 0, bw, bh, mi_x, mi_y); 245 } 246 } 247} 248 249void vp9_build_inter_predictors_sby(MACROBLOCKD *xd, int mi_row, int mi_col, 250 BLOCK_SIZE bsize) { 251 build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 0, 0); 252} 253 254void vp9_build_inter_predictors_sbp(MACROBLOCKD *xd, int mi_row, int mi_col, 255 BLOCK_SIZE bsize, int plane) { 256 build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, plane, plane); 257} 258 259void vp9_build_inter_predictors_sbuv(MACROBLOCKD *xd, int mi_row, int mi_col, 260 BLOCK_SIZE bsize) { 261 build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 1, 262 MAX_MB_PLANE - 1); 263} 264 265void vp9_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col, 266 BLOCK_SIZE bsize) { 267 build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 0, 268 MAX_MB_PLANE - 1); 269} 270 271void vp9_setup_dst_planes(struct macroblockd_plane planes[MAX_MB_PLANE], 272 const YV12_BUFFER_CONFIG *src, 273 int mi_row, int mi_col) { 274 uint8_t *const buffers[MAX_MB_PLANE] = { src->y_buffer, src->u_buffer, 275 src->v_buffer}; 276 const int strides[MAX_MB_PLANE] = { src->y_stride, src->uv_stride, 277 src->uv_stride}; 278 int i; 279 280 for (i = 0; i < MAX_MB_PLANE; ++i) { 281 struct macroblockd_plane *const pd = &planes[i]; 282 setup_pred_plane(&pd->dst, buffers[i], strides[i], mi_row, mi_col, NULL, 283 pd->subsampling_x, pd->subsampling_y); 284 } 285} 286 287void vp9_setup_pre_planes(MACROBLOCKD *xd, int idx, 288 const YV12_BUFFER_CONFIG *src, 289 int mi_row, int mi_col, 290 const struct scale_factors *sf) { 291 if (src != NULL) { 292 int i; 293 uint8_t *const buffers[MAX_MB_PLANE] = { src->y_buffer, src->u_buffer, 294 src->v_buffer}; 295 const int strides[MAX_MB_PLANE] = { src->y_stride, src->uv_stride, 296 src->uv_stride}; 297 for (i = 0; i < MAX_MB_PLANE; ++i) { 298 struct macroblockd_plane *const pd = &xd->plane[i]; 299 setup_pred_plane(&pd->pre[idx], buffers[i], strides[i], mi_row, mi_col, 300 sf, pd->subsampling_x, pd->subsampling_y); 301 } 302 } 303} 304