Compute offset as we go rather than once every pass().

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

diff --git a/src/lib/content.cc b/src/lib/content.cc
index 8b611f6b63c0385794979b1d740a8c773d9d00f4..7afbf924f63912c5631caf1a8b138583ad3ca616 100644 (file)
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2013-2015 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/>.
 
 */
 
@@ -50,6 +51,7 @@ int const ContentProperty::POSITION = 401;
 int const ContentProperty::LENGTH = 402;
 int const ContentProperty::TRIM_START = 403;
 int const ContentProperty::TRIM_END = 404;
+int const ContentProperty::VIDEO_FRAME_RATE = 405;
 
 Content::Content (shared_ptr<const Film> film)
        : _film (film)
@@ -155,7 +157,11 @@ Content::examine (shared_ptr<Job> job)
 void
 Content::signal_changed (int p)
 {
-       emit (boost::bind (boost::ref (Changed), shared_from_this (), p, _change_signals_frequent));
+       try {
+               emit (boost::bind (boost::ref (Changed), shared_from_this (), p, _change_signals_frequent));
+       } catch (boost::bad_weak_ptr) {
+               /* This must be during construction; never mind */
+       }
 }
 
 void
@@ -223,13 +229,11 @@ Content::technical_summary () const
 DCPTime
 Content::length_after_trim () const
 {
-       shared_ptr<const Film> film = _film.lock ();
-       DCPOMATIC_ASSERT (film);
-       return max (DCPTime (), full_length() - DCPTime (trim_start() + trim_end(), film->active_frame_rate_change (position ())));
+       return max (DCPTime (), full_length() - DCPTime (trim_start() + trim_end(), film()->active_frame_rate_change (position ())));
 }
 
-/** @return string which includes everything about how this content affects
- *  its playlist.
+/** @return string which changes when something about this content changes which affects
+ *  the appearance of its video.
  */
 string
 Content::identifier () const
@@ -279,13 +283,69 @@ Content::path_summary () const
        return s;
 }
 
-/** @return a list of properties that might be interesting to the user; first string is the property name,
- *  second is the value.
- */
-list<pair<string, string> >
-Content::properties () const
+/** @return a list of properties that might be interesting to the user */
+list<UserProperty>
+Content::user_properties () const
 {
-       list<pair<string, string> > p;
+       list<UserProperty> p;
        add_properties (p);
        return p;
 }
+
+shared_ptr<const Film>
+Content::film () const
+{
+       shared_ptr<const Film> film = _film.lock ();
+       DCPOMATIC_ASSERT (film);
+       return film;
+}
+
+/** @return DCP times of points within this content where a reel split could occur */
+list<DCPTime>
+Content::reel_split_points () const
+{
+       list<DCPTime> t;
+       /* XXX: this is questionable; perhaps the position itself should be forced to be on a frame boundary */
+       t.push_back (position().round_up (film()->video_frame_rate()));
+       return t;
+}
+
+void
+Content::set_video_frame_rate (double r)
+{
+       {
+               boost::mutex::scoped_lock lm (_mutex);
+               _video_frame_rate = r;
+       }
+
+       signal_changed (ContentProperty::VIDEO_FRAME_RATE);
+}
+
+double
+Content::active_video_frame_rate () const
+{
+       {
+               boost::mutex::scoped_lock lm (_mutex);
+               if (_video_frame_rate) {
+                       return _video_frame_rate.get ();
+               }
+       }
+
+       /* No frame rate specified, so assume this content has been
+          prepared for any concurrent video content or perhaps
+          just the DCP rate.
+       */
+       shared_ptr<const Film> film = _film.lock ();
+       DCPOMATIC_ASSERT (film);
+       return film->active_frame_rate_change(position()).source;
+}
+
+void
+Content::add_properties (list<UserProperty>& p) const
+{
+       p.push_back (UserProperty (_("General"), _("Filename"), path(0).string ()));
+
+       if (_video_frame_rate) {
+               p.push_back (UserProperty (_("General"), _("Video frame rate"), raw_convert<string> (_video_frame_rate.get(), 5), _("frames per second")));
+       }
+}