X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fframe_rate_change.cc;h=d0b302bb402a84d76f7c448d4d0405594a32b1e8;hb=b85420b326b74c7c8125bf599993d71460ad881e;hp=3e9c4b50528c4bf0fb3e4fe2fc786015d32c4a43;hpb=2e504b33eb9f38cac629ad31b7c107fb0cf5efda;p=dcpomatic.git

diff --git a/src/lib/frame_rate_change.cc b/src/lib/frame_rate_change.cc
index 3e9c4b505..d0b302bb4 100644
--- a/src/lib/frame_rate_change.cc
+++ b/src/lib/frame_rate_change.cc
@@ -1,5 +1,5 @@
 /*
-    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
@@ -23,8 +23,10 @@
 
 #include "i18n.h"
 
+using std::string;
+
 static bool
-about_equal (float a, float b)
+about_equal (double a, double b)
 {
 	/* A film of F seconds at f FPS will be Ff frames;
 	   Consider some delta FPS d, so if we run the same
@@ -35,14 +37,14 @@ about_equal (float a, float b)
 	    = Ff + Fd - Ff frames
 	    = Fd frames
 	    = Fd/f seconds
- 
+
 	   So if we accept a difference of 1 frame, ie 1/f seconds, we can
 	   say that
 
 	   1/f = Fd/f
 	ie 1 = Fd
 	ie d = 1/F
- 
+
 	   So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
 	   FPS error is 1/F ~= 0.0001 ~= 10-e4
 	*/
@@ -51,8 +53,10 @@ about_equal (float a, float b)
 }
 
 
-FrameRateChange::FrameRateChange (float source, int dcp)
-	: skip (false)
+FrameRateChange::FrameRateChange (double source_, int dcp_)
+	: source (source_)
+	, dcp (dcp_)
+	, skip (false)
 	, repeat (1)
 	, change_speed (false)
 {
@@ -71,6 +75,12 @@ FrameRateChange::FrameRateChange (float source, int dcp)
 
 	speed_up = dcp / (source * factor());
 	change_speed = !about_equal (speed_up, 1.0);
+}
+
+string
+FrameRateChange::description () const
+{
+	string description;
 
 	if (!skip && repeat == 1 && !change_speed) {
 		description = _("Content and DCP have the same rate.\n");
@@ -84,8 +94,10 @@ FrameRateChange::FrameRateChange (float source, int dcp)
 		}
 
 		if (change_speed) {
-			float const pc = dcp * 100 / (source * factor());
+			double const pc = dcp * 100 / (source * factor());
 			description += String::compose (_("DCP will run at %1%% of the content speed.\n"), pc);
 		}
 	}
+
+	return description;
 }