1.1 --- a/src/dsys.c	Fri Sep 02 19:12:12 2011 +0300
     1.2 +++ b/src/dsys.c	Sun Sep 04 06:44:49 2011 +0300
     1.3 @@ -128,6 +128,7 @@
     1.4  			perror("read_script: failed to allocate memory for an event\n");
     1.5  			return -1;
     1.6  		}
     1.7 +		memset(ev, 0, sizeof *ev);
     1.8  		ev->t0 = dsys_msec_to_dtime(t0);
     1.9  		ev->t1 = dsys_msec_to_dtime(t1);
    1.10  
    1.11 @@ -155,7 +156,7 @@
    1.12  
    1.13  	demo->evlist = sort_evlist(demo->evlist, demo->num_ev);
    1.14  
    1.15 -	dbg_print_events(demo->evlist);
    1.16 +	/*dbg_print_events(demo->evlist);*/
    1.17  
    1.18  	return 0;
    1.19  }
    1.20 @@ -214,7 +215,7 @@
    1.21  		return;	/* nothing changes */
    1.22  	}
    1.23  
    1.24 -	while(demo->active->t1 <= demo->tm) {
    1.25 +	while(demo->active && demo->active->t1 <= demo->tm) {
    1.26  		proc_event(demo->active, demo->tm);
    1.27  		demo->active = demo->active->next;
    1.28  	}
    1.29 @@ -239,11 +240,12 @@
    1.30  	if(ev->val != val) {
    1.31  		struct callback *cb = ev->cblist;
    1.32  
    1.33 +		ev->val = val;
    1.34 +
    1.35  		while(cb) {
    1.36  			cb->func(ev, cb->cls);
    1.37  			cb = cb->next;
    1.38  		}
    1.39 -		ev->val = val;
    1.40  	}
    1.41  }
    1.42  
    1.43 @@ -306,10 +308,15 @@
    1.44  		tm = demo->duration;
    1.45  	}
    1.46  
    1.47 +	if(tm < demo->tm) {
    1.48 +		/* on backwards seek, invalidate the sliding window */
    1.49 +		demo->nextev = demo->active = demo->evlist;
    1.50 +	}
    1.51 +
    1.52  	demo->start_tm = demo->src_tm - tm;
    1.53  	demo->stoppage_tm = 0;
    1.54 -
    1.55 -	demo->nextev = demo->active = demo->evlist;
    1.56 +	demo->stop_tm = demo->src_tm;
    1.57 +	demo->tm = tm;
    1.58  
    1.59  	/* recalculate events */
    1.60  	ev = demo->evlist;