/*
- Copyright (C) 2012-2014 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
* @brief Time class.
*/
+#include "raw_convert.h"
#include "dcp_time.h"
#include "exceptions.h"
#include <boost/algorithm/string.hpp>
-#include <boost/lexical_cast.hpp>
#include <iostream>
#include <vector>
#include <cmath>
using namespace boost;
using namespace dcp;
-Time::Time (int frame, int frames_per_second)
- : h (0)
- , m (0)
- , s (0)
- , t (0)
+Time::Time (int frame, int frames_per_second, int tcr_)
{
- set (double (frame) / frames_per_second);
+ set (double (frame) / frames_per_second, tcr_);
}
-Time::Time (int64_t ticks)
+/** Construct a Time from a number of seconds and a timecode rate.
+ *
+ * @param seconds A number of seconds.
+ * @param tcr_ Timecode rate.
+ */
+Time::Time (double seconds, int tcr_)
{
- h = ticks / (60 * 60 * 250);
- ticks -= int64_t (h) * 60 * 60 * 250;
- m = ticks / (60 * 250);
- ticks -= int64_t (m) * 60 * 250;
- s = ticks / 250;
- ticks -= int64_t (s) * 250;
- t = ticks;
+ set (seconds, tcr_);
}
+/** Construct a Time with specified timecode rate and using the supplied
+ * number of seconds.
+ *
+ * @param seconds A number of seconds.
+ * @param tcr_ Timecode rate to use.
+ */
void
-Time::set (double ss)
+Time::set (double seconds, int tcr_)
{
- t = (int (round (ss * 1000)) % 1000) / 4;
- s = floor (ss);
+ s = floor (seconds);
+ tcr = tcr_;
- if (s > 60) {
+ e = int (round ((seconds - s) * tcr));
+
+ 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)
+/** @param time String of the form HH:MM:SS:EE[E] */
+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 = lexical_cast<int> (b[0]);
- m = lexical_cast<int> (b[1]);
- s = lexical_cast<int> (b[2]);
- t = lexical_cast<int> (b[3]);
+
+ 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.t == b.t);
+ return (a.h == b.h && a.m == b.m && a.s == b.s && (a.e * b.tcr) == (b.e * a.tcr));
}
bool
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.t != b.t) {
- return a.t <= b.t;
- }
+ return a < b || a == b;
+}
- return true;
+bool
+dcp::operator>= (Time const & a, Time const & b)
+{
+ return a > b || a == b;
}
bool
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;
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 &
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 const & b)
+dcp::operator+ (Time a, Time b)
{
Time r;
- r.t = a.t + b.t;
- if (r.t >= 250) {
- r.t -= 250;
+ /* 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++;
}
}
dcp::Time
-dcp::operator- (Time a, Time const & b)
+dcp::operator- (Time a, Time b)
{
Time r;
- r.t = a.t - b.t;
- if (r.t < 0) {
- r.t += 250;
+ /* 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--;
}
float
dcp::operator/ (Time a, Time const & b)
{
- int64_t const at = a.h * 3600 * 250 + a.m * 60 * 250 + a.s * 250 + a.t;
- int64_t const bt = b.h * 3600 * 250 + b.m * 60 * 250 + b.s * 250 + b.t;
+ 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:t */
+/** @return A string of the form h:m:s:e padded as in 00:00:00:000 (for Interop) or 00:00:00:00 (for SMPTE) */
string
-Time::to_string () const
+Time::as_string (Standard standard) const
{
stringstream str;
- str << h << ":" << m << ":" << s << ":" << t;
+ str << setw(2) << setfill('0') << h << ":"
+ << setw(2) << setfill('0') << m << ":"
+ << setw(2) << setfill('0') << s << ":";
+
+ if (standard == SMPTE) {
+ str << setw(2) << setfill('0') << e;
+ } else {
+ str << setw(3) << setfill('0') << e;
+ }
+
return str.str ();
}
-/** @return This time in ticks */
+/** @param tcr_ Timecode rate with which the return value should be counted.
+ * @return the total number of editable units that this time consists of at the specified timecode rate, rounded up
+ * to the nearest editable unit. For example, as_editable_units (24) returns the total time in frames at 24fps.
+ */
int64_t
-Time::to_ticks () const
+Time::as_editable_units (int tcr_) const
+{
+ return ceil (int64_t(e) * double (tcr_) / tcr) + int64_t(s) * tcr_ + int64_t(m) * 60 * tcr_ + int64_t(h) * 60 * 60 * tcr_;
+}
+
+/** @return the total number of seconds that this time consists of */
+double
+Time::as_seconds () const
{
- return int64_t(t) + int64_t(s) * 250 + int64_t(m) * 60 * 250 + int64_t(h) * 60 * 60 * 250;
+ return h * 3600 + m * 60 + s + double(e) / tcr;
}
+/** @param tcr_ New timecode rate.
+ * @return A new Time which is this time at the spcified new timecode rate.
+ */
+Time
+Time::rebase (int tcr_) const
+{
+ return Time (h, m, s, floor (float (e) * tcr_ / tcr), tcr_);
+}
projects / libdcp.git / blobdiff