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Diffstat (limited to 'media/libvpx/vp9/common/vp9_reconinter.c')
| -rw-r--r-- | media/libvpx/vp9/common/vp9_reconinter.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_reconinter.c b/media/libvpx/vp9/common/vp9_reconinter.c new file mode 100644 index 000000000..11eaf2e2d --- /dev/null +++ b/media/libvpx/vp9/common/vp9_reconinter.c @@ -0,0 +1,317 @@ +/* + * 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 <assert.h> + +#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 inter_predictor(const uint8_t *src, int src_stride, + uint8_t *dst, int dst_stride, + const int subpel_x, + const int subpel_y, + const struct scale_factors *sf, + int w, int h, int ref, + const InterpKernel *kernel, + int xs, int ys) { + sf->predict[subpel_x != 0][subpel_y != 0][ref]( + src, src_stride, dst, dst_stride, + kernel[subpel_x], xs, kernel[subpel_y], ys, w, h); +} + +#if CONFIG_VP9_HIGHBITDEPTH +void high_inter_predictor(const uint8_t *src, int src_stride, + uint8_t *dst, int dst_stride, + const int subpel_x, + const int subpel_y, + const struct scale_factors *sf, + int w, int h, int ref, + const InterpKernel *kernel, + int xs, int ys, int bd) { + sf->highbd_predict[subpel_x != 0][subpel_y != 0][ref]( + src, src_stride, dst, dst_stride, + kernel[subpel_x], xs, kernel[subpel_y], ys, w, h, bd); +} + +void vp9_highbd_build_inter_predictor(const uint8_t *src, int src_stride, + uint8_t *dst, int dst_stride, + const MV *src_mv, + const struct scale_factors *sf, + int w, int h, int ref, + const InterpKernel *kernel, + enum mv_precision precision, + int x, int y, int bd) { + 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 }; + MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf); + 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); + + high_inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y, + sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4, bd); +} +#endif // CONFIG_VP9_HIGHBITDEPTH + +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 *sf, + int w, int h, int ref, + const InterpKernel *kernel, + enum mv_precision precision, + int x, int y) { + 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 }; + MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf); + 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); + + inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y, + sf, w, h, ref, kernel, sf->x_step_q4, sf->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; +} + +static INLINE int round_mv_comp_q2(int value) { + return (value < 0 ? value - 1 : value + 1) / 2; +} + +static MV mi_mv_pred_q2(const MODE_INFO *mi, int idx, int block0, int block1) { + MV res = { round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.row + + mi->bmi[block1].as_mv[idx].as_mv.row), + round_mv_comp_q2(mi->bmi[block0].as_mv[idx].as_mv.col + + mi->bmi[block1].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; +} + +MV average_split_mvs(const struct macroblockd_plane *pd, + const MODE_INFO *mi, int ref, int block) { + const int ss_idx = ((pd->subsampling_x > 0) << 1) | (pd->subsampling_y > 0); + MV res = {0, 0}; + switch (ss_idx) { + case 0: + res = mi->bmi[block].as_mv[ref].as_mv; + break; + case 1: + res = mi_mv_pred_q2(mi, ref, block, block + 2); + break; + case 2: + res = mi_mv_pred_q2(mi, ref, block, block + 1); + break; + case 3: + res = mi_mv_pred_q4(mi, ref); + break; + default: + assert(ss_idx <= 3 && ss_idx >= 0); + } + return res; +} + +void build_inter_predictors(MACROBLOCKD *xd, int plane, int block, + int bw, int bh, + int x, int y, int w, int h, + int mi_x, int mi_y) { + struct macroblockd_plane *const pd = &xd->plane[plane]; + const MODE_INFO *mi = xd->mi[0]; + const int is_compound = has_second_ref(&mi->mbmi); + const InterpKernel *kernel = vp9_get_interp_kernel(mi->mbmi.interp_filter); + int ref; + + for (ref = 0; ref < 1 + is_compound; ++ref) { + const struct scale_factors *const sf = &xd->block_refs[ref]->sf; + 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; + const MV mv = mi->mbmi.sb_type < BLOCK_8X8 + ? average_split_mvs(pd, mi, ref, block) + : 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, subpel_x, subpel_y; + const int is_scaled = vp9_is_scaled(sf); + + if (is_scaled) { + pre = pre_buf->buf + scaled_buffer_offset(x, y, pre_buf->stride, sf); + scaled_mv = vp9_scale_mv(&mv_q4, mi_x + x, mi_y + y, sf); + xs = sf->x_step_q4; + ys = sf->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; + } + subpel_x = scaled_mv.col & SUBPEL_MASK; + subpel_y = scaled_mv.row & SUBPEL_MASK; + pre += (scaled_mv.row >> SUBPEL_BITS) * pre_buf->stride + + (scaled_mv.col >> SUBPEL_BITS); + +#if CONFIG_VP9_HIGHBITDEPTH + if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { + high_inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, + subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys, + xd->bd); + } else { + inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, + subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys); + } +#else + inter_predictor(pre, pre_buf->stride, dst, dst_buf->stride, + subpel_x, subpel_y, sf, w, h, ref, kernel, xs, ys); +#endif // CONFIG_VP9_HIGHBITDEPTH + } +} + +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; + const int mi_x = mi_col * MI_SIZE; + const int mi_y = mi_row * MI_SIZE; + for (plane = plane_from; plane <= plane_to; ++plane) { + const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, + &xd->plane[plane]); + const int num_4x4_w = num_4x4_blocks_wide_lookup[plane_bsize]; + const int num_4x4_h = num_4x4_blocks_high_lookup[plane_bsize]; + const int bw = 4 * num_4x4_w; + const int bh = 4 * num_4x4_h; + + if (xd->mi[0]->mbmi.sb_type < BLOCK_8X8) { + int i = 0, x, y; + assert(bsize == BLOCK_8X8); + for (y = 0; y < num_4x4_h; ++y) + for (x = 0; x < num_4x4_w; ++x) + build_inter_predictors(xd, plane, i++, bw, bh, + 4 * x, 4 * y, 4, 4, mi_x, mi_y); + } else { + build_inter_predictors(xd, plane, 0, bw, bh, + 0, 0, bw, bh, 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_sbp(MACROBLOCKD *xd, int mi_row, int mi_col, + BLOCK_SIZE bsize, int plane) { + build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, plane, plane); +} + +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); +} + +void vp9_setup_dst_planes(struct macroblockd_plane planes[MAX_MB_PLANE], + const YV12_BUFFER_CONFIG *src, + int mi_row, int mi_col) { + uint8_t *const buffers[MAX_MB_PLANE] = { src->y_buffer, src->u_buffer, + src->v_buffer}; + const int strides[MAX_MB_PLANE] = { src->y_stride, src->uv_stride, + src->uv_stride}; + int i; + + for (i = 0; i < MAX_MB_PLANE; ++i) { + struct macroblockd_plane *const pd = &planes[i]; + setup_pred_plane(&pd->dst, buffers[i], strides[i], mi_row, mi_col, NULL, + pd->subsampling_x, pd->subsampling_y); + } +} + +void vp9_setup_pre_planes(MACROBLOCKD *xd, int idx, + const YV12_BUFFER_CONFIG *src, + int mi_row, int mi_col, + const struct scale_factors *sf) { + if (src != NULL) { + int i; + uint8_t *const buffers[MAX_MB_PLANE] = { src->y_buffer, src->u_buffer, + src->v_buffer}; + const int strides[MAX_MB_PLANE] = { src->y_stride, src->uv_stride, + src->uv_stride}; + for (i = 0; i < MAX_MB_PLANE; ++i) { + struct macroblockd_plane *const pd = &xd->plane[i]; + setup_pred_plane(&pd->pre[idx], buffers[i], strides[i], mi_row, mi_col, + sf, pd->subsampling_x, pd->subsampling_y); + } + } +} |