commit 35deaa73bce26aa45e00a4e4c44308074206bba8
author Jingning Han <jingning@google.com> Thu Oct 26 15:36:30 2017 -0700
committer Jingning Han <jingning@google.com> Sat Oct 28 02:37:20 2017 +0000
tree e1fc50ef0152deb1fd6d3a2a63a468ecd0804568
parent a24a6900282cf39b1eb9bc064b380d4b91555870

Extend the eob context model

Account for 1-D/2-D transform kernels for the eob modeling. To
maintain a smaller context cardinality, set the two 1-D transform
kernels in the same category. The difference in directions should
be largely covered by the scan order.

This and the previous CLs on nz_map context modeling together
improve the compression performance of level-map coefficient coding
system by 0.4% for lowres.

Change-Id: I8c4f03ca01ce3d248950d04bd1266f445b4227a0

av1/decoder/decodetxb.c

diff --git a/av1/decoder/decodetxb.c b/av1/decoder/decodetxb.c
index 5006b19..d7732e5 100644
--- a/av1/decoder/decodetxb.c
+++ b/av1/decoder/decodetxb.c
@@ -324,7 +324,7 @@
   int is_equal = 0;
 
   for (int i = 1; i < max_eob_pt; i++) {
-    int eob_pos_ctx = get_eob_pos_ctx(i);
+    int eob_pos_ctx = av1_get_eob_pos_ctx(tx_type, i);
     is_equal = av1_read_record_bin(
         counts, r, ec_ctx->eob_flag_cdf[txs_ctx][plane_type][eob_pos_ctx], 2,
         ACCT_STR);