decrease_duration
decrease_duration(&ev, IMON_UNIT);
decrease_duration(&ev, JVC_BIT_1_SPACE);
decrease_duration(&ev, JVC_BIT_0_SPACE);
decrease_duration(&ev, MCIR2_BIT_END);
decrease_duration(&ev, MCIR2_BIT_END);
decrease_duration(&ev, RC5X_SPACE);
decrease_duration(&ev, RC5_BIT_START);
decrease_duration(&ev, RC5_BIT_END);
decrease_duration(&ev, RC6_BIT_END);
decrease_duration(&ev, RC6_TOGGLE_END);
decrease_duration(&ev, RC6_BIT_END);
decrease_duration(&ev, SONY_BIT_SPACE);