Make terminate_threads() less likely to leave _threads containing invalid pointers.

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

diff --git a/src/lib/video_content_scale.cc b/src/lib/video_content_scale.cc
index 418c46eecd121fbf1d4019f27ae1f752758d5105..73dfd27fef38d9ef4ea5a9cbf707952e0dfee4f7 100644 (file)
--- a/src/lib/video_content_scale.cc
+++ b/src/lib/video_content_scale.cc
@@ -1,34 +1,38 @@
 /*
-    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2018 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 <boost/optional.hpp>
-#include <libxml++/libxml++.h>
-#include <libcxml/cxml.h>
 #include "video_content_scale.h"
+#include "video_content.h"
 #include "ratio.h"
-#include "safe_stringstream.h"
 #include "util.h"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <boost/optional.hpp>
+#include <iostream>
 
 #include "i18n.h"
 
 using std::vector;
 using std::string;
+using std::min;
+using std::cout;
 using boost::shared_ptr;
 using boost::optional;
 
@@ -80,22 +84,18 @@ VideoContentScale::as_xml (xmlpp::Node* node) const
 string
 VideoContentScale::id () const
 {
-       SafeStringStream s;
-       
        if (_ratio) {
-               s << _ratio->id ();
-       } else {
-               s << (_scale ? "S1" : "S0");
+               return _ratio->id ();
        }
-       
-       return s.str ();
+
+       return (_scale ? "S1" : "S0");
 }
 
 string
 VideoContentScale::name () const
 {
        if (_ratio) {
-               return _ratio->nickname ();
+               return _ratio->image_nickname ();
        }
 
        if (_scale) {
@@ -105,45 +105,45 @@ VideoContentScale::name () const
        return _("No scale");
 }
 
-VideoContentScale
-VideoContentScale::from_id (string id)
-{
-       Ratio const * r = Ratio::from_id (id);
-       if (r) {
-               return VideoContentScale (r);
-       }
-
-       if (id == "S0") {
-               return VideoContentScale (false);
-       }
-
-       return VideoContentScale (true);
-}
-               
 /** @param display_container Size of the container that we are displaying this content in.
  *  @param film_container The size of the film's image.
+ *  @return Size, in pixels that the VideoContent's image should be scaled to (taking into account its pixel aspect ratio)
  */
 dcp::Size
-VideoContentScale::size (shared_ptr<const VideoContent> c, dcp::Size display_container, dcp::Size film_container, int round) const
+VideoContentScale::size (shared_ptr<const VideoContent> c, dcp::Size display_container, dcp::Size film_container) const
 {
+       /* Work out the size of the content if it were put inside film_container */
+
+       dcp::Size video_size_after_crop = c->size_after_crop();
+       video_size_after_crop.width *= c->sample_aspect_ratio().get_value_or(1);
+
+       dcp::Size size;
+
        if (_ratio) {
-               return fit_ratio_within (_ratio->ratio (), display_container, round);
+               /* Stretch to fit the requested ratio */
+               size = fit_ratio_within (_ratio->ratio (), film_container);
+       } else if (_scale || video_size_after_crop.width > film_container.width || video_size_after_crop.height > film_container.height) {
+               /* Scale, preserving aspect ratio; this is either if we have been asked to scale with no stretch
+                  or if the unscaled content is too big for film_container.
+               */
+               size = fit_ratio_within (video_size_after_crop.ratio(), film_container);
+       } else {
+               /* No stretch nor scale */
+               size = video_size_after_crop;
        }
 
-       dcp::Size const ac = c->video_size_after_crop ();
+       /* Now scale it down if the display container is smaller than the film container */
+       if (display_container != film_container) {
+               float const scale = min (
+                       float (display_container.width) / film_container.width,
+                       float (display_container.height) / film_container.height
+                       );
 
-       /* Force scale if the film_container is smaller than the content's image */
-       if (_scale || film_container.width < ac.width || film_container.height < ac.height) {
-               return fit_ratio_within (ac.ratio (), display_container, round);
+               size.width = lrintf (size.width * scale);
+               size.height = lrintf (size.height * scale);
        }
 
-       /* Scale the image so that it will be in the right place in film_container, even if display_container is a
-          different size.
-       */
-       return dcp::Size (
-               c->video_size().width  * float(display_container.width)  / film_container.width,
-               c->video_size().height * float(display_container.height) / film_container.height
-               );
+       return size;
 }
 
 void