Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Path
REDSHIFT_FILE_PATHParameter: Layer
REDSHIFT_FILE_LAYERParameter: Color Space
REDSHIFT_FILE_COLORSPACEParameter: Animation
REDSHIFT_FILE_ANIMATION_MODEParameter: Range Start
REDSHIFT_FILE_ANIMATION_RANGE_STARTParameter: Range End
REDSHIFT_FILE_ANIMATION_RANGE_ENDParameter: Loops
REDSHIFT_FILE_ANIMATION_LOOP_COUNTParameter: Start Frame
REDSHIFT_FILE_ANIMATION_FRAME_STARTParameter: End Frame
REDSHIFT_FILE_ANIMATION_FRAME_ENDParameter: Frame Rate
REDSHIFT_FILE_ANIMATION_FRAME_RATEParameter: Start Offset
REDSHIFT_FILE_ANIMATION_FRAME_OFFSETParameter: Timing
REDSHIFT_FILE_ANIMATION_TIMING_MODE