Revert "Merge commit 'd1d7678040cd60148f97b372cb4291bcc45b2e22'"

This reverts commit 796027f22154c799e0063e2457b31e0cfd1dddae, reversing
changes made to bca30ed2b67f095fd31e07319a622ac30ad22978.

Preemptive revert before further testing has been done.

1 files changed, 6 insertions, 0 deletions

diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
index 977977431e..323639dc19 100644
--- a/libavcodec/h264dec.c
+++ b/libavcodec/h264dec.c
@@ -783,6 +783,12 @@ again:
                 ret = -1;
                 goto end;
             }
+            if (nal->type != H264_NAL_IDR_SLICE) {
+                av_log(h->avctx, AV_LOG_ERROR,
+                       "Invalid mix of idr and non-idr slices\n");
+                ret = -1;
+                goto end;
+            }
             if(!idr_cleared) {
                 if (h->current_slice && (avctx->active_thread_type & FF_THREAD_SLICE)) {
                     av_log(h, AV_LOG_ERROR, "invalid mixed IDR / non IDR frames cannot be decoded in slice multithreading mode\n");