commit 45a30ac1399cd94cceb283fc6b2b40a3f1127664
author Yaowu Xu <yaowu@google.com> Tue Sep 04 08:47:05 2018 -0700
committer Yaowu Xu <yaowu@google.com> Tue Sep 04 21:00:59 2018 +0000
tree 40a65ac6cc5a955bd46fd781740bb651a57e790a
parent 6e2aac2fb2b49d00b5c0748835c1c45880632689

Ensure new sequence not start with a show_existing frame

This commit adds a check to return error when a new coded video sequence
starts with a frame having show_existing_frame equal true.

Change-Id: Ifd61d5c4d7a61babda1819160216d4033ca4e9cb

av1/decoder/decodeframe.c

diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 385c2c3..0a50328 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -4434,6 +4434,11 @@
     cm->reset_decoder_state = 0;
 
     if (cm->show_existing_frame) {
+      if (pbi->sequence_header_changed) {
+        aom_internal_error(
+            &cm->error, AOM_CODEC_CORRUPT_FRAME,
+            "New sequence header starts with a show_existing_frame.");
+      }
       // Show an existing frame directly.
       const int existing_frame_idx = aom_rb_read_literal(rb, 3);
       const int frame_to_show = cm->ref_frame_map[existing_frame_idx];