/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
/** @file src/dcp_time.cc
- * @brief A representation of time within a DCP.
+ * @brief Time class.
*/
+#include "raw_convert.h"
+#include "dcp_time.h"
+#include "exceptions.h"
+#include <boost/algorithm/string.hpp>
#include <iostream>
+#include <vector>
#include <cmath>
-#include "dcp_time.h"
using namespace std;
-using namespace libdcp;
+using namespace boost;
+using namespace dcp;
+
+Time::Time (int frame, int frames_per_second, int tcr_)
+{
+ set (double (frame) / frames_per_second, tcr_);
+}
-Time::Time (int frame, int frames_per_second)
- : h (0)
- , m (0)
- , s (0)
- , t (0)
+Time::Time (double seconds)
{
- float sec_float = float (frame) / frames_per_second;
- t = (int (floor (sec_float * 1000)) % 1000) / 4;
- s = floor (sec_float);
+ set (seconds, 24);
+}
+
+void
+Time::set (double seconds, int tcr_)
+{
+ s = floor (seconds);
+ tcr = tcr_;
+
+ e = int (round ((seconds - s) * tcr));
- if (s > 60) {
+ if (s >= 60) {
m = s / 60;
s -= m * 60;
+ } else {
+ m = 0;
}
- if (m > 60) {
+ if (m >= 60) {
h = m / 60;
m -= h * 60;
+ } else {
+ h = 0;
+ }
+}
+
+Time::Time (string time, int tcr_)
+ : tcr (tcr_)
+{
+ vector<string> b;
+ split (b, time, is_any_of (":"));
+ if (b.size() != 4) {
+ boost::throw_exception (DCPReadError ("unrecognised time specification"));
}
+
+ h = raw_convert<int> (b[0]);
+ m = raw_convert<int> (b[1]);
+ s = raw_convert<int> (b[2]);
+ e = raw_convert<int> (b[3]);
+}
+
+bool
+dcp::operator== (Time const & a, Time const & b)
+{
+ return (a.h == b.h && a.m == b.m && a.s == b.s && (a.e * b.tcr) == (b.e * a.tcr));
+}
+
+bool
+dcp::operator!= (Time const & a, Time const & b)
+{
+ return !(a == b);
}
bool
-libdcp::operator== (Time const & a, Time const & b)
+dcp::operator<= (Time const & a, Time const & b)
{
- return (a.h == b.h && a.m == b.m && a.s == b.s && a.t == b.t);
+ return a < b || a == b;
+}
+
+bool
+dcp::operator>= (Time const & a, Time const & b)
+{
+ return a > b || a == b;
+}
+
+bool
+dcp::operator< (Time const & a, Time const & b)
+{
+ if (a.h != b.h) {
+ return a.h < b.h;
+ }
+
+ if (a.m != b.m) {
+ return a.m < b.m;
+ }
+
+ if (a.s != b.s) {
+ return a.s < b.s;
+ }
+
+ if ((a.e * b.tcr) != (b.e * a.tcr)) {
+ return (a.e * b.tcr) < (b.e * a.tcr);
+ }
+
+ return true;
}
bool
-libdcp::operator<= (Time const & a, Time const & b)
+dcp::operator> (Time const & a, Time const & b)
{
if (a.h != b.h) {
- return a.h <= b.h;
+ return a.h > b.h;
}
if (a.m != b.m) {
- return a.m <= b.m;
+ return a.m > b.m;
}
if (a.s != b.s) {
- return a.s <= b.s;
+ return a.s > b.s;
}
- if (a.t != b.t) {
- return a.t <= b.t;
+ if ((a.e * b.tcr) != (b.e * a.tcr)) {
+ return (a.e * b.tcr) > (b.e * a.tcr);
}
return true;
}
ostream &
-libdcp::operator<< (ostream& s, Time const & t)
+dcp::operator<< (ostream& s, Time const & t)
{
- s << t.h << ":" << t.m << ":" << t.s << "." << t.t;
+ s << t.h << ":" << t.m << ":" << t.s << "." << t.e;
return s;
}
+
+dcp::Time
+dcp::operator+ (Time a, Time b)
+{
+ Time r;
+
+ /* Make sure we have a common tcr */
+ if (a.tcr != b.tcr) {
+ a.e *= b.tcr;
+ b.e *= a.tcr;
+ r.tcr = a.tcr * b.tcr;
+ } else {
+ r.tcr = a.tcr;
+ }
+
+ r.e = a.e + b.e;
+ if (r.e >= r.tcr) {
+ r.e -= r.tcr;
+ r.s++;
+ }
+
+ r.s += a.s + b.s;
+ if (r.s >= 60) {
+ r.s -= 60;
+ r.m++;
+ }
+
+ r.m += a.m + b.m;
+ if (r.m >= 60) {
+ r.m -= 60;
+ r.h++;
+ }
+
+ r.h += a.h + b.h;
+
+ return r;
+}
+
+dcp::Time
+dcp::operator- (Time a, Time b)
+{
+ Time r;
+
+ /* Make sure we have a common tcr */
+ if (a.tcr != b.tcr) {
+ a.e *= b.tcr;
+ b.e *= a.tcr;
+ r.tcr = a.tcr * b.tcr;
+ } else {
+ r.tcr = a.tcr;
+ }
+
+ r.e = a.e - b.e;
+ if (r.e < 0) {
+ r.e += r.tcr;
+ r.s--;
+ }
+
+ r.s += (a.s - b.s);
+ if (r.s < 0) {
+ r.s += 60;
+ r.m--;
+ }
+
+ r.m += (a.m - b.m);
+ if (r.m < 0) {
+ r.m += 60;
+ r.h--;
+ }
+
+ r.h += (a.h - b.h);
+
+ return r;
+}
+
+float
+dcp::operator/ (Time a, Time const & b)
+{
+ int64_t const at = a.h * 3600 + a.m * 60 + a.s * float (a.e) / a.tcr;
+ int64_t const bt = b.h * 3600 + b.m * 60 + b.s * float (b.e) / b.tcr;
+ return float (at) / bt;
+}
+
+/** @return A string of the form h:m:s:e padded as in 00:00:00:000 */
+string
+Time::as_string () const
+{
+ stringstream str;
+ str << setw(2) << setfill('0') << h << ":"
+ << setw(2) << setfill('0') << m << ":"
+ << setw(2) << setfill('0') << s << ":"
+ << setw(3) << setfill('0') << e;
+ return str.str ();
+}
+
+int64_t
+Time::as_editable_units (int tcr_) const
+{
+ return (int64_t(e) * float (tcr_ / tcr)) + int64_t(s) * tcr_ + int64_t(m) * 60 * tcr_ + int64_t(h) * 60 * 60 * tcr_;
+}
+
+double
+Time::as_seconds () const
+{
+ return h * 3600 + m * 60 + s + double(e) / tcr;
+}
+
+Time
+Time::rebase (int tcr_) const
+{
+ return Time (h, m, s, rint (float (e) * tcr_ / tcr), tcr_);
+}
projects / libdcp.git / blobdiff