Extract common code out into kdm_for_screen()

[dcpomatic.git] / src / lib / video_examiner.h

diff --git a/src/lib/video_examiner.h b/src/lib/video_examiner.h
index 87e9a04288a20fb13018391ad4c124a58b757e05..4e5c6dc0a322c3fd57c024aa6611775178a68226 100644 (file)
--- a/src/lib/video_examiner.h
+++ b/src/lib/video_examiner.h
@@ -1,19 +1,20 @@
 /*
-    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2016 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/>.
 
 */
 
@@ -21,9 +22,9 @@
  *  @brief VideoExaminer class.
  */
 
-#include <dcp/types.h>
 #include "types.h"
 #include "video_content.h"
+#include <dcp/types.h>
 
 /** @class VideoExaminer
  *  @brief Parent for classes which examine video sources and obtain information about them.
@@ -32,7 +33,20 @@ class VideoExaminer
 {
 public:
        virtual ~VideoExaminer () {}
-       virtual float video_frame_rate () const = 0;
+
+       virtual bool has_video () const = 0;
+
+       /** @return video frame rate (if known); must not be called if has_video() == false */
+       virtual boost::optional<double> video_frame_rate () const = 0;
+       /** @return video size; must not be called if has_video() == false */
        virtual dcp::Size video_size () const = 0;
-       virtual ContentTime video_length () const = 0;
+       /** @return video length in frames; must not be called if has_video() == false */
+       virtual Frame video_length () const = 0;
+       /** @return video sample aspect ratio (if known); must not be called if has_video() == false */
+       virtual boost::optional<double> sample_aspect_ratio () const {
+               return boost::optional<double> ();
+       }
+       /** @return true if this video is in YUV; must not be called if has_video() == false */
+       virtual bool yuv () const = 0;
+       virtual VideoRange range () const = 0;
 };