Supporters update.

[dcpomatic.git] / src / lib / ratio.cc

diff --git a/src/lib/ratio.cc b/src/lib/ratio.cc
index bb69636584167d12b19d358e99d5a25193394d76..5f1a3aa63d31a98a9b6afa441e86d84140b6f455 100644 (file)
--- a/src/lib/ratio.cc
+++ b/src/lib/ratio.cc
@@ -1,58 +1,151 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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,
+    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
-#include <dcp/types.h>
+
 #include "ratio.h"
 #include "util.h"
+#include "config.h"
+#include <dcp/types.h>
+#include <cfloat>
 
 #include "i18n.h"
 
+
 using std::string;
 using std::vector;
+using boost::optional;
+
+
+vector<Ratio> Ratio::_ratios;
 
-vector<Ratio const *> Ratio::_ratios;
 
 void
 Ratio::setup_ratios ()
 {
-       _ratios.push_back (new Ratio (float(1290) / 1080, "119", _("1.19"), "119"));
-       _ratios.push_back (new Ratio (float(1440) / 1080, "133", _("4:3"), "133"));
-       _ratios.push_back (new Ratio (float(1480) / 1080, "137", _("Academy"), "137"));
-       _ratios.push_back (new Ratio (float(1485) / 1080, "138", _("1.375"), "137"));
-       _ratios.push_back (new Ratio (float(1800) / 1080, "166", _("1.66"), "166"));
-       _ratios.push_back (new Ratio (float(1920) / 1080, "178", _("16:9"), "178"));
-       _ratios.push_back (new Ratio (float(1998) / 1080, "185", _("Flat"), "F"));
-       _ratios.push_back (new Ratio (float(2048) /  858, "239", _("Scope"), "S"));
-       _ratios.push_back (new Ratio (float(2048) / 1080, "full-frame", _("Full frame"), "C"));
+       /* This must only be called once as we rely on the addresses of objects in _ratios staying the same */
+       DCPOMATIC_ASSERT (_ratios.empty());
+
+       _ratios.push_back (Ratio(float(1290) / 1080, "119", _("1.19"),              {},                      "119"));
+       _ratios.push_back (Ratio(float(1440) / 1080, "133", _("1.33 (4:3)"),        {},                      "133"));
+       _ratios.push_back (Ratio(float(1485) / 1080, "138", _("1.38 (Academy)"),    {},                      "137"));
+       _ratios.push_back (Ratio(float(1544) / 1080, "143", _("1.43 (IMAX)"),       {},                      "143"));
+       _ratios.push_back (Ratio(float(1800) / 1080, "166", _("1.66"),              {},                      "166"));
+       _ratios.push_back (Ratio(float(1920) / 1080, "178", _("1.78 (16:9 or HD)"), {},                      "178"));
+       _ratios.push_back (Ratio(float(1998) / 1080, "185", _("1.85 (Flat)"),       string(_("DCI Flat")),   "F"));
+       _ratios.push_back (Ratio(float(2048) /  872, "235", _("2.35 (35mm Scope)"), {},                      "S"));
+       _ratios.push_back (Ratio(float(2048) /  858, "239", _("2.39 (Scope)"),      string(_("DCI Scope")),  "S"));
+       _ratios.push_back (Ratio(float(2048) / 1080, "190", _("1.90 (Full frame)"), string(_("Full frame")), "C"));
 }
 
+
+vector<Ratio const *>
+Ratio::all ()
+{
+       vector<Ratio const *> pointers;
+       for (Ratio& ratio: _ratios) {
+               pointers.push_back (&ratio);
+       }
+       return pointers;
+}
+
+
 Ratio const *
 Ratio::from_id (string i)
 {
-       vector<Ratio const *>::iterator j = _ratios.begin ();
-       while (j != _ratios.end() && (*j)->id() != i) {
+       /* We removed the ratio with id 137; replace it with 138 */
+       if (i == "137") {
+               i = "138";
+       }
+
+       auto j = _ratios.begin ();
+       while (j != _ratios.end() && j->id() != i) {
+               ++j;
+       }
+
+       if (j == _ratios.end()) {
+               return nullptr;
+       }
+
+       return &(*j);
+}
+
+
+/** @return Ratio corresponding to a given fractional ratio (+/- 0.01), or 0 */
+Ratio const *
+Ratio::from_ratio (float r)
+{
+       auto j = _ratios.begin ();
+       while (j != _ratios.end() && fabs(j->ratio() - r) > 0.01) {
                ++j;
        }
 
        if (j == _ratios.end ()) {
-               return 0;
+               return nullptr;
+       }
+
+       return &(*j);
+}
+
+
+Ratio const *
+Ratio::nearest_from_ratio (float r)
+{
+       vector<Ratio>::const_iterator nearest = _ratios.end();
+       float distance = FLT_MAX;
+
+       for (auto i = _ratios.begin(); i != _ratios.end(); ++i) {
+               float const d = fabs(i->ratio() - r);
+               if (d < distance) {
+                       distance = d;
+                       nearest = i;
+               }
+       }
+
+       DCPOMATIC_ASSERT (nearest != _ratios.end());
+
+       return &(*nearest);
+}
+
+vector<Ratio const *>
+Ratio::containers ()
+{
+       if (Config::instance()->allow_any_container()) {
+               return all();
+       }
+
+       vector<Ratio const *> r;
+       r.push_back (Ratio::from_id ("185"));
+       r.push_back (Ratio::from_id ("239"));
+       return r;
+}
+
+
+string
+Ratio::container_nickname () const
+{
+       if (!_container_nickname) {
+               /* Fall back to the image nickname; this just for when non-standard container
+                  ratios are enabled.
+               */
+               return _image_nickname;
        }
 
-       return *j;
+       return *_container_nickname;
 }