process next bar/space width from input stream. see zbar_decode_width()

draw a new image into the output window. see zbar_window_draw()

start/stop video capture. see zbar_video_enable()

Enable or disable the inter-image result cache (default disabled). Mostly useful for scanning video frames, the cache filters duplicate results from c

enable or disable the inter-image result cache. see zbar_image_scanner_enable_cache()