X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fdcp_time.cc;h=7a4a67d667ead2ad0a0559f94e210da12c5163eb;hb=76e3325a16cdf6d7220a61e2b5cfdb9c804cc32c;hp=0cc6b264894c00be6c11b257ddbe73084c523f17;hpb=fd23bf276facab3892a00f010ac7e991bc79af09;p=libdcp.git diff --git a/src/dcp_time.cc b/src/dcp_time.cc index 0cc6b264..7a4a67d6 100644 --- a/src/dcp_time.cc +++ b/src/dcp_time.cc @@ -1,85 +1,378 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2016 Carl Hetherington - This program is free software; you can redistribute it and/or modify + This file is part of libdcp. + + libdcp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + libdcp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with libdcp. If not, see . + + In addition, as a special exception, the copyright holders give + permission to link the code of portions of this program with the + OpenSSL library under certain conditions as described in each + individual source file, and distribute linked combinations + including the two. + You must obey the GNU General Public License in all respects + for all of the code used other than OpenSSL. If you modify + file(s) with this exception, you may extend this exception to your + version of the file(s), but you are not obligated to do so. If you + do not wish to do so, delete this exception statement from your + version. If you delete this exception statement from all source + files in the program, then also delete it here. */ /** @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 "compose.hpp" +#include "dcp_assert.h" +#include +#include #include +#include #include -#include "dcp_time.h" using namespace std; -using namespace libdcp; +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, double frames_per_second, int tcr_) { - float sec_float = float (frame) / frames_per_second; - t = (int (floor (sec_float * 1000)) % 1000) / 4; - s = floor (sec_float); + set (double (frame) / frames_per_second, tcr_); +} + +/** 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_) +{ + 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 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; + } +} + +/** @param time String of the form + * HH:MM:SS:EE for SMPTE + * HH:MM:SS:E[E[E]] or HH:MM:SS.s[s[s]] for Interop + * where HH are hours, MM minutes, SS seconds, EE editable units and + * sss millseconds. + * + * @param tcr_ Timecode rate if this is a SMPTE time, otherwise empty for an Interop time. + */ +Time::Time (string time, optional tcr_) +{ + vector b; + split (b, time, is_any_of (":")); + + if (b.size() < 3 || b[0].empty() || b[1].empty() || b[0].length() > 2 || b[1].length() > 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1", time))); + } + + if (!tcr_) { + /* Interop */ + if (b.size() == 3) { + /* HH:MM:SS.s[s[s]] */ + vector bs; + split (bs, b[2], is_any_of (".")); + if (bs.size() != 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1", time))); + } + + h = raw_convert (b[0]); + m = raw_convert (b[1]); + if (bs[0].empty() || bs[0].length() > 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, bs[0]))); + } + s = raw_convert (bs[0]); + if (bs[1].empty() || bs[1].length() > 3) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, bs[1]))); + } + e = raw_convert (bs[1]); + tcr = 1000; + } else if (b.size() == 4) { + /* HH:MM:SS:EE[E] */ + h = raw_convert (b[0]); + m = raw_convert (b[1]); + if (b[2].empty() || b[2].length() > 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, b[2]))); + } + s = raw_convert (b[2]); + if (b[3].empty() || b[3].length() > 3) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, b[3]))); + } + e = raw_convert (b[3]); + tcr = 250; + } else { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1", time))); + } + + } else { + /* SMPTE: HH:MM:SS:EE */ + split (b, time, is_any_of (":")); + if (b.size() != 4) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; does not have 4 parts", time))); + } + + h = raw_convert (b[0]); + m = raw_convert (b[1]); + if (b[2].empty() || b[2].length() > 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, b[2]))); + } + s = raw_convert (b[2]); + if (b[3].empty() || b[3].length() > 2) { + boost::throw_exception (ReadError (String::compose ("unrecognised time specification %1; %2 has bad length", time, b[3]))); + } + e = raw_convert (b[3]); + tcr = tcr_.get(); } } 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.h == b.h && a.m == b.m && a.s == b.s && (a.e * b.tcr) == (b.e * a.tcr)); } bool -libdcp::operator<= (Time const & a, Time const & b) +dcp::operator!= (Time const & a, Time const & b) +{ + return !(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) +{ + return a > b || a == b; +} + +bool +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; + } + + return (a.e * b.tcr) < (b.e * a.tcr); +} + +bool +dcp::operator> (Time const & a, Time const & b) +{ + if (a.h != b.h) { + return a.h > b.h; } - if (a.t != b.t) { - return a.t <= b.t; + if (a.m != b.m) { + return a.m > b.m; + } + + if (a.s != b.s) { + return a.s > b.s; } - return true; + return (a.e * b.tcr) > (b.e * a.tcr); } 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 (for Interop) or 00:00:00:00 (for SMPTE) */ +string +Time::as_string (Standard standard) const +{ + char buffer[64]; + + if (standard == Standard::SMPTE) { + snprintf (buffer, sizeof(buffer), "%02d:%02d:%02d:%02d", h, m, s, e); + } else { + snprintf (buffer, sizeof(buffer), "%02d:%02d:%02d:%03d", h, m, s, e); + } + + return buffer; +} + +/** @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::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 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 +{ + long int e_ = lrintf (float (e) * tcr_ / tcr); + int s_ = s; + if (e_ >= tcr_) { + e_ -= tcr_; + ++s_; + } + int m_ = m; + if (s_ >= 60) { + s_ -= 60; + ++m_; + } + int h_ = h; + if (m_ >= 60) { + m_ -= 60; + ++h_; + } + + return Time (h_, m_, s_, e_, tcr_); +}