Add missing files.

2 files changed, 93 insertions, 0 deletions

diff --git a/src/stl_util.cc b/src/stl_util.cc
new file mode 100644
index 0000000..c145a34
--- /dev/null
+++ b/src/stl_util.cc
@@ -0,0 +1,66 @@
+/*
+    Copyright (C) 2014 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
+    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,
+    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.
+
+*/
+
+#include "stl_util.h"
+#include "exceptions.h"
+#include "compose.hpp"
+#include <string>
+#include <cmath>
+
+using std::string;
+using namespace sub;
+
+bool
+about_equal (float a, float b)
+{
+	return fabs (a - b) < 1e-4;
+}
+
+string
+sub::stl_frame_rate_to_dfc (float r)
+{
+	/* This is the FAB Subtitler mapping, as used by Annotation Edit */
+	if (about_equal (r, 23.976)) {
+		return "STL24.01";
+	} else if (about_equal (r, 24)) {
+		return "STL23.01";
+	} else if (about_equal (r, 25)) {
+		return "STL25.01";
+	} else if (about_equal (r, 30)) {
+		return "STL30.01";
+	}
+
+	return "STL25.01";
+}
+
+float
+sub::stl_dfc_to_frame_rate (string s)
+{
+	if (s == "STL24.01") {
+		return 23.976;
+	} else if (s == "STL23.01") {
+		return 24;
+	} else if (s == "STL25.01") {
+		return 25;
+	} else if (s == "STL30.01") {
+		return 30;
+	}
+
+	throw STLError (String::compose ("Unknown disk format code %1 in binary STL file", s));
+}
diff --git a/src/stl_util.h b/src/stl_util.h
new file mode 100644
index 0000000..0da8215
--- /dev/null
+++ b/src/stl_util.h
@@ -0,0 +1,27 @@
+/*
+    Copyright (C) 2014 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
+    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,
+    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.
+
+*/
+
+#include <string>
+
+namespace sub {
+
+std::string stl_frame_rate_to_dfc (float r);
+float stl_dfc_to_frame_rate (std::string s);
+
+}