@@ -19,6 +19,7 @@

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

+#include "libavutil/thread.h"

 #include "avfilter.h"

 #include "config.h"

 #include "opencl_allkernels.h"

@@ -37,14 +38,8 @@

         avfilter_register(&ff_##x);                                     \

     }

-void avfilter_register_all(void)

+static void register_all(void)

 {

-    static int initialized;

-

-    if (initialized)

-        return;

-    initialized = 1;

-

     REGISTER_FILTER(ABENCH,         abench,         af);

     REGISTER_FILTER(ACOMPRESSOR,    acompressor,    af);

     REGISTER_FILTER(ACROSSFADE,     acrossfade,     af);

@@ -380,3 +375,10 @@ void avfilter_register_all(void)

     REGISTER_FILTER_UNCONDITIONAL(vf_fifo);

     ff_opencl_register_filter_kernel_code_all();

 }

+

+void avfilter_register_all(void)

+{

+    AVOnce control = AV_ONCE_INIT;

+

+    ff_thread_once(&control, register_all);

+}