=== /** * Returns the ITU EOTF corresponding to a given TRC. This converts from the * signal level [0,1] to the raw output display luminance in nits (cd/m^2). * This is done per channel in RGB space, except for AVCOL_TRC_SMPTE428, which * assumes CIE XYZ in- and output. * * @return A pointer to the function implementing the given TRC, or NULL if no * such function is defined. * * @note In general, the resulting function is defined (wherever possible) for * out-of-range values, even though these values do not have a physical * meaning on the given display. Users should clamp inputs (or outputs) * if this behavior is not desired. * * This is also the case for functions like PQ, which are defined over an * absolute signal range independent of the target display capabilities. */ av_csp_eotf_function av_csp_itu_eotf(enum AVColorTransferCharacteristic trc); I guess this can be used for potential HDR waveform scope display?