PRINT_SMD_FLAG
PRINT_SMD_FLAG(ET_0, "Traditional gamma - SDR Luminance Range");
PRINT_SMD_FLAG(ET_1, "Traditional gamma - HDR Luminance Range");
PRINT_SMD_FLAG(ET_2, "SMPTE ST 2084");
PRINT_SMD_FLAG(ET_3, "Hybrid Log-Gamma");
PRINT_SMD_FLAG(SM_0, "Static Metadata Type 1");