X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fratio.cc;h=bc83ae87c4059d0ba07b5d2d50cba70c64ec7c1c;hb=58f0530b1687673ea6e24a083063c3fdf2bff0b2;hp=275f4ef15ab5215a14b6679b6e52ed58b01b77dd;hpb=034feb503b0a38eb82c21ae8d9f83522fc63a25c;p=dcpomatic.git

diff --git a/src/lib/ratio.cc b/src/lib/ratio.cc
index 275f4ef15..bc83ae87c 100644
--- a/src/lib/ratio.cc
+++ b/src/lib/ratio.cc
@@ -24,7 +24,6 @@
 #include "i18n.h"
 
 using std::string;
-using std::stringstream;
 using std::vector;
 
 vector<Ratio const *> Ratio::_ratios;
@@ -32,12 +31,12 @@ vector<Ratio const *> Ratio::_ratios;
 void
 Ratio::setup_ratios ()
 {
-	_ratios.push_back (new Ratio (float(1290) / 1080, "119", _("1.19"), "F"));
-	_ratios.push_back (new Ratio (float(1440) / 1080, "133", _("4:3"), "F"));
-	_ratios.push_back (new Ratio (float(1480) / 1080, "137", _("Academy"), "F"));
-	_ratios.push_back (new Ratio (float(1485) / 1080, "138", _("1.375"), "F"));
-	_ratios.push_back (new Ratio (float(1800) / 1080, "166", _("1.66"), "F"));
-	_ratios.push_back (new Ratio (float(1920) / 1080, "178", _("16:9"), "F"));
+	_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"));
@@ -57,3 +56,36 @@ Ratio::from_id (string i)
 
 	return *j;
 }
+
+/** @return Ratio corresponding to a given fractional ratio (+/- 0.01), or 0 */
+Ratio const *
+Ratio::from_ratio (float r)
+{
+	vector<Ratio const *>::iterator j = _ratios.begin ();
+	while (j != _ratios.end() && fabs ((*j)->ratio() - r) > 0.01) {
+		++j;
+	}
+
+	if (j == _ratios.end ()) {
+		return 0;
+	}
+
+	return *j;
+}
+   
+Ratio const *
+Ratio::nearest_from_ratio (float r)
+{
+	Ratio const * nearest = 0;
+	float distance = FLT_MAX;
+	
+	for (vector<Ratio const *>::iterator i = _ratios.begin (); i != _ratios.end(); ++i) {
+		float const d = fabs ((*i)->ratio() - r);
+		if (d < distance) {
+			distance = d;
+			nearest = *i;
+		}
+	}
+
+	return nearest;
+}