110 typedef struct HEVCSEI {  struct
111     HEVCSEIPictureHash picture_hash;  argument
112     HEVCSEIFramePacking frame_packing;  argument
113     HEVCSEIDisplayOrientation display_orientation;  argument
114     HEVCSEIPictureTiming picture_timing;  argument
115     HEVCSEIA53Caption a53_caption;  argument
116     HEVCSEIUnregistered unregistered;  argument
117     HEVCSEIMasteringDisplay mastering_display;  argument
118     HEVCSEIDynamicHDRPlus dynamic_hdr_plus;  argument
119     HEVCSEIContentLight content_light;  argument
121     HEVCSEIAlternativeTransfer alternative_transfer;  argument
122     HEVCSEITimeCode timecode;  argument
123 } HEVCSEI;  argument