77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
//
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// ZoneMinder Core Interfaces, $Date$, $Revision$
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// Copyright (C) 2003, 2004, 2005 Philip Coombes
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#ifndef ZM_H
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#define ZM_H
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extern "C"
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{
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#include "zm_debug.h"
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}
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#include "zm_config.h"
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extern "C"
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{
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#if !HAVE_DECL_ROUND
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double round(double);
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#endif
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}
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// Structure used for storing the results of the subtraction
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// of one struct timeval from another
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struct DeltaTimeval
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{
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bool positive;
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unsigned long delta;
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unsigned long sec;
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unsigned long fsec;
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unsigned long prec;
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};
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#define DT_GRAN_1000000 1000000
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#define DT_PREC_6 DT_GRAN_1000000
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#define DT_GRAN_100000 100000
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#define DT_PREC_5 DT_GRAN_100000
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#define DT_GRAN_10000 10000
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#define DT_PREC_4 DT_GRAN_10000
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#define DT_GRAN_1000 1000
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#define DT_PREC_3 DT_GRAN_1000
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#define DT_GRAN_100 100
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#define DT_PREC_2 DT_GRAN_100
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#define DT_GRAN_10 10
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#define DT_PREC_1 DT_GRAN_10
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#define DT_MAXGRAN DT_GRAN_1000000
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// This obviously wouldn't work for massive deltas but as it's mostly
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// for frames it will only usually be a fraction of a second or so
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#define DELTA_TIMEVAL( result, time1, time2, precision ) \
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{ \
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int delta = (((time1).tv_sec-(time2).tv_sec)*(precision))+(((time1).tv_usec-(time2).tv_usec)/(DT_MAXGRAN/(precision))); \
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result.positive = (delta>=0); \
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result.delta = abs(delta); \
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result.sec = result.delta/(precision); \
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result.fsec = result.delta%(precision); \
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result.prec = (precision); \
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}
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#endif // ZM_H
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