resp               33 core/ptp_chdk.h     int (*send_resp)(int handle, PTPContainer *resp, int zero); // (0xFF9F5688), ixus30/40 needs a third argument, which is always 0
resp               35 core/ptp_chdk.h     int (*send_err_resp)(int handle, PTPContainer *resp); // (0xFF9F5784)