diff options
Diffstat (limited to 'vp9/common/vp9_reconinter.c')
| -rw-r--r-- | vp9/common/vp9_reconinter.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/vp9/common/vp9_reconinter.c b/vp9/common/vp9_reconinter.c index 3c2b2cdf6..7cd0a86c3 100644 --- a/vp9/common/vp9_reconinter.c +++ b/vp9/common/vp9_reconinter.c @@ -173,6 +173,49 @@ static void build_inter_predictors(int plane, int block, } } +// TODO(jkoleszar): In principle, pred_w, pred_h are unnecessary, as we could +// calculate the subsampled BLOCK_SIZE_TYPE, but that type isn't defined for +// sizes smaller than 16x16 yet. +typedef void (*foreach_predicted_block_visitor)(int plane, int block, + BLOCK_SIZE_TYPE bsize, + int pred_w, int pred_h, + void *arg); +static INLINE void foreach_predicted_block_in_plane( + const MACROBLOCKD* const xd, BLOCK_SIZE_TYPE bsize, int plane, + foreach_predicted_block_visitor visit, void *arg) { + int i, x, y; + + // block sizes in number of 4x4 blocks log 2 ("*_b") + // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8 + // subsampled size of the block + const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x; + const int bhl = b_height_log2(bsize) - xd->plane[plane].subsampling_y; + + // size of the predictor to use. + int pred_w, pred_h; + + if (xd->mode_info_context->mbmi.sb_type < BLOCK_8X8) { + assert(bsize == BLOCK_8X8); + pred_w = 0; + pred_h = 0; + } else { + pred_w = bwl; + pred_h = bhl; + } + assert(pred_w <= bwl); + assert(pred_h <= bhl); + + // visit each subblock in raster order + i = 0; + for (y = 0; y < 1 << bhl; y += 1 << pred_h) { + for (x = 0; x < 1 << bwl; x += 1 << pred_w) { + visit(plane, i, bsize, pred_w, pred_h, arg); + i += 1 << pred_w; + } + i += (1 << (bwl + pred_h)) - (1 << bwl); + } +} + static void build_inter_predictors_for_planes(MACROBLOCKD *xd, BLOCK_SIZE_TYPE bsize, int mi_row, int mi_col, |