From 811d290844206fc73dc39c3e5b67d5d895baedf8 Mon Sep 17 00:00:00 2001
From: Rainer Hochecker <fernetmenta@online.de>
Date: Sat, 26 Jan 2019 19:48:35 +0100
Subject: [PATCH] avcodec/vaapi_h264: skip decode if pic has no slices

This fixes / workarounds https://bugs.freedesktop.org/show_bug.cgi?id=105368.
It was hit frequently when watching h264 channels received via DVB-X.
Corresponding kodi bug: https://github.com/xbmc/xbmc/issues/15704
---
 libavcodec/vaapi_h264.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/vaapi_h264.c b/libavcodec/vaapi_h264.c
index 5854587a255..f12fdc457a4 100644
--- a/libavcodec/vaapi_h264.c
+++ b/libavcodec/vaapi_h264.c
@@ -317,6 +317,11 @@ static int vaapi_h264_end_frame(AVCodecContext *avctx)
     H264SliceContext *sl = &h->slice_ctx[0];
     int ret;
 
+    if (pic->nb_slices == 0) {
+        ret = AVERROR_INVALIDDATA;
+        goto finish;
+    }
+
     ret = ff_vaapi_decode_issue(avctx, pic);
     if (ret < 0)
         goto finish;