2 Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "video_content_scale.h"
21 #include "video_content.h"
23 #include "safe_stringstream.h"
25 #include <libcxml/cxml.h>
26 #include <libxml++/libxml++.h>
27 #include <boost/optional.hpp>
35 using boost::shared_ptr;
36 using boost::optional;
38 vector<VideoContentScale> VideoContentScale::_scales;
40 VideoContentScale::VideoContentScale (Ratio const * r)
47 VideoContentScale::VideoContentScale ()
54 VideoContentScale::VideoContentScale (bool scale)
61 VideoContentScale::VideoContentScale (shared_ptr<cxml::Node> node)
65 optional<string> r = node->optional_string_child ("Ratio");
67 _ratio = Ratio::from_id (r.get ());
69 _scale = node->bool_child ("Scale");
74 VideoContentScale::as_xml (xmlpp::Node* node) const
77 node->add_child("Ratio")->add_child_text (_ratio->id ());
79 node->add_child("Scale")->add_child_text (_scale ? "1" : "0");
84 VideoContentScale::id () const
91 s << (_scale ? "S1" : "S0");
98 VideoContentScale::name () const
101 return _ratio->nickname ();
105 return _("No stretch");
108 return _("No scale");
112 VideoContentScale::from_id (string id)
114 Ratio const * r = Ratio::from_id (id);
116 return VideoContentScale (r);
120 return VideoContentScale (false);
123 return VideoContentScale (true);
126 /** @param display_container Size of the container that we are displaying this content in.
127 * @param film_container The size of the film's image.
130 VideoContentScale::size (shared_ptr<const VideoContent> c, dcp::Size display_container, dcp::Size film_container) const
132 /* Work out the size of the content if it were put inside film_container */
134 dcp::Size const video_size_after_crop = c->video_size_after_crop ();
139 /* Stretch to fit the requested ratio */
140 size = fit_ratio_within (_ratio->ratio (), film_container);
141 } else if (_scale || video_size_after_crop.width > film_container.width || video_size_after_crop.height > film_container.height) {
142 /* Scale, preserving aspect ratio; this is either if we have been asked to scale with no stretch
143 or if the unscaled content is too big for film_container.
145 size = fit_ratio_within (video_size_after_crop.ratio(), film_container);
147 /* No stretch nor scale */
148 size = video_size_after_crop;
151 /* Now scale it down if the display container is smaller than the film container */
152 if (display_container != film_container) {
153 float const scale = min (
154 float (display_container.width) / film_container.width,
155 float (display_container.height) / film_container.height
158 size.width = rint (size.width * scale);
159 size.height = rint (size.height * scale);
166 VideoContentScale::setup_scales ()
168 vector<Ratio const *> ratios = Ratio::all ();
169 for (vector<Ratio const *>::const_iterator i = ratios.begin(); i != ratios.end(); ++i) {
170 _scales.push_back (VideoContentScale (*i));
173 _scales.push_back (VideoContentScale (true));
174 _scales.push_back (VideoContentScale (false));
178 operator== (VideoContentScale const & a, VideoContentScale const & b)
180 return (a.ratio() == b.ratio() && a.scale() == b.scale());
184 operator!= (VideoContentScale const & a, VideoContentScale const & b)
186 return (a.ratio() != b.ratio() || a.scale() != b.scale());