Function av_mastering_display_metadata_alloc_size

pub unsafe extern "C" fn av_mastering_display_metadata_alloc_size(
    size: *mut usize,
) -> *mut AVMasteringDisplayMetadata

Allocate an AVMasteringDisplayMetadata structure and set its fields to default values. The resulting struct can be freed using av_freep().

@return An AVMasteringDisplayMetadata filled with default values or NULL on failure.