commit 469719a03037e49be75c003612f5383f9667aceb
author Venkatarama Avadhani <venkatarama.avadhani@ittiam.com> Tue May 30 09:18:44 2017 +0530
committer android-build-team Robot <android-build-team-robot@google.com> Fri Jun 16 18:28:13 2017 +0000
tree d3681b9c9f46778c5e13cf40360fe5cae00253a0
parent 85e3eb0c584f9f94667c8db765fb69f4c9ff29a3

Update mbs_left In Case Of Missing Slice

If a vertical slice position is read different from the current decode
position, the u2_mb_y and u2_mb_x values were updated but the number of
MBs left to decode was not. Adding code to do the same.

Bug: 37273547
Change-Id: I8e4df576525eb0536446532967eb1fdbd4f5af4a
(cherry picked from commit f013a814f7765f3da1f26acfe003d3f16402735c)

decoder/impeg2d_dec_hdr.c

diff --git a/decoder/impeg2d_dec_hdr.c b/decoder/impeg2d_dec_hdr.c
index 68bf0b0..770f4f2 100644
--- a/decoder/impeg2d_dec_hdr.c
+++ b/decoder/impeg2d_dec_hdr.c
@@ -810,6 +810,12 @@
     {
         ps_dec->u2_mb_y    = u4_slice_vertical_position;
         ps_dec->u2_mb_x    = 0;
+
+        /* Update the number of MBs left, since we have probably missed a slice
+         * (that's why we see a mismatch between u2_mb_y and current position).
+         */
+        ps_dec->u2_num_mbs_left = (ps_dec->u2_num_vert_mb - ps_dec->u2_mb_y)
+                        * ps_dec->u2_num_horiz_mb;
     }
     ps_dec->u2_first_mb = 1;