@@ -26,6 +26,8 @@
 #import "IJKFFOptions.h"
 #import "IJKSDLGLViewProtocol.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 // media meta
 #define k_IJKM_KEY_FORMAT         @"format"
 #define k_IJKM_KEY_DURATION_US    @"duration_us"
@@ -159,3 +161,4 @@ void IJKFFIOStatCompleteDebugCallback(const char *url,
 void IJKFFIOStatCompleteRegister(void (*cb)(const char *url,
                                             int64_t read_bytes, int64_t total_size,
                                             int64_t elpased_time, int64_t total_duration));
+NS_ASSUME_NONNULL_END