From cf699e9faa58c42beca43b0914dd18e90ba52e1b Mon Sep 17 00:00:00 2001
From: Herman Chen <herman.chen@rock-chips.com>
Date: Thu, 2 Jun 2022 15:35:23 +0800
Subject: [PATCH] [mpp_enc]: Add max 2 frame delay on async enc path

Signed-off-by: Herman Chen <herman.chen@rock-chips.com>
Change-Id: I34dda78bdc3511272dfc76dd8b80e82540298ad9
---
 mpp/mpp.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mpp/mpp.cpp b/mpp/mpp.cpp
index a0c514f3..d85ce8d7 100644
--- a/mpp/mpp.cpp
+++ b/mpp/mpp.cpp
@@ -676,7 +676,8 @@ MPP_RET Mpp::put_frame_async(MppFrame frame)
     if (mFrmIn->trylock())
         return MPP_NOK;
 
-    if (mFrmIn->list_size()) {
+    /* NOTE: the max input queue length is 2 */
+    if (mFrmIn->list_size() >= 2) {
         mFrmIn->unlock();
         return MPP_NOK;
     }