Function cm_sample_buffer_get_frame_info 

pub unsafe extern "C" fn cm_sample_buffer_get_frame_info(
    sample_buffer: *mut c_void,
    out_fields: *mut u32,
    out_status: *mut i32,
    out_display_time: *mut u64,
    out_scale_factor: *mut f64,
    out_content_scale: *mut f64,
    out_content_rect: *mut f64,
    out_bounding_rect: *mut f64,
    out_screen_rect: *mut f64,
    out_presenter_overlay_rect: *mut f64,
) -> bool

Single-call frame attachment fetch — populates out_fields with bits for each successfully-read field. See FrameInfoFields for the bit layout. Replaces the per-attribute accessors above for the hot path (one attachment-array fetch + one CF→Swift bridge cast vs. one per field), measured at ~4× faster when reading multiple fields per frame.