Fix arf_src_offset calculation

The offset should be computed with respect to the current coding
process standing.

Change-Id: I63fc303eb062d5fd68b8d1faa3b4172cdfcce168

diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c
index 876a2fb4fd6dce9319c6914188bb1deacad39d30..38e1d37cc4b2d4a060467ea35399c3d9353340fe 100644 (file)
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -2355,7 +2355,7 @@ static void find_arf_order(GF_GROUP *gf_group, int *layer_depth,
   // Process ARF frame
   layer_depth[*index_counter] = depth;
   gf_group->update_type[*index_counter] = ARF_UPDATE;
-  gf_group->arf_src_offset[*index_counter] = mid;
+  gf_group->arf_src_offset[*index_counter] = mid - start;
   gf_group->rf_level[*index_counter] = GF_ARF_LOW;
   ++(*index_counter);