dnn: fix issue when pthread is not supported

Signed-off-by: Guo, Yejun <yejun.guo@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/libavfilter/vf_dnn_processing.c b/libavfilter/vf_dnn_processing.c
index da4508b50e..fff5696a31 100644
--- a/libavfilter/vf_dnn_processing.c
+++ b/libavfilter/vf_dnn_processing.c
@@ -110,6 +110,13 @@ static av_cold int init(AVFilterContext *context)
         av_log(ctx, AV_LOG_WARNING, "this backend does not support async execution, roll back to sync.\n");
     }
 
+#if !HAVE_PTHREAD_CANCEL
+    if (ctx->async) {
+        ctx->async = 0;
+        av_log(ctx, AV_LOG_WARNING, "pthread is not supported, roll back to sync.\n");
+    }
+#endif
+
     return 0;
 }