From a8dde02f27adb689f2559b57a99e49b5c16cc53b Mon Sep 17 00:00:00 2001
From: fbossen <frank@bossentech.com>
Date: Tue, 11 Sep 2018 18:54:20 -0230
Subject: [PATCH] Apply normative clamping to MV stack (#568)
See section 7.10.2.14 context and clamping process
---
src/context.rs | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/src/context.rs b/src/context.rs
index c2ef119e..33216a20 100755
--- a/src/context.rs
+++ b/src/context.rs
@@ -2430,6 +2430,20 @@ impl ContextWriter {
/* TODO: Handle single reference frame extension */
+ // clamp mvs
+ for mv in mv_stack {
+ let blk_w = bsize.width();
+ let blk_h = bsize.height();
+ let border_w = 128 + blk_w as isize * 8;
+ let border_h = 128 + blk_h as isize * 8;
+ let x_min = -(bo.x as isize) * (8 * MI_SIZE) as isize - border_w;
+ let x_max = (self.bc.cols - bo.x - blk_w / MI_SIZE) as isize * (8 * MI_SIZE) as isize + border_w;
+ let y_min = -(bo.y as isize) * (8 * MI_SIZE) as isize - border_h;
+ let y_max = (self.bc.rows - bo.y - blk_h / MI_SIZE) as isize * (8 * MI_SIZE) as isize + border_h;
+ mv.this_mv.row = (mv.this_mv.row as isize).max(y_min).min(y_max) as i16;
+ mv.this_mv.col = (mv.this_mv.col as isize).max(x_min).min(x_max) as i16;
+ }
+
mode_context
}
--
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