2 Copyright (C) 2013-2014 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 /** @file src/lib/content.cc
21 * @brief Content class.
24 #include <boost/thread/mutex.hpp>
25 #include <libxml++/libxml++.h>
26 #include <libcxml/cxml.h>
29 #include "content_factory.h"
30 #include "ui_signaller.h"
31 #include "exceptions.h"
37 using std::stringstream;
42 using boost::shared_ptr;
43 using boost::lexical_cast;
45 int const ContentProperty::PATH = 400;
46 int const ContentProperty::POSITION = 401;
47 int const ContentProperty::LENGTH = 402;
48 int const ContentProperty::TRIM_START = 403;
49 int const ContentProperty::TRIM_END = 404;
51 Content::Content (shared_ptr<const Film> f)
56 , _change_signals_frequent (false)
61 Content::Content (shared_ptr<const Film> f, DCPTime p)
66 , _change_signals_frequent (false)
71 Content::Content (shared_ptr<const Film> f, boost::filesystem::path p)
76 , _change_signals_frequent (false)
81 Content::Content (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
83 , _change_signals_frequent (false)
85 list<cxml::NodePtr> path_children = node->node_children ("Path");
86 for (list<cxml::NodePtr>::const_iterator i = path_children.begin(); i != path_children.end(); ++i) {
87 _paths.push_back ((*i)->content ());
89 _digest = node->string_child ("Digest");
90 _position = DCPTime (node->number_child<double> ("Position"));
91 _trim_start = DCPTime (node->number_child<double> ("TrimStart"));
92 _trim_end = DCPTime (node->number_child<double> ("TrimEnd"));
95 Content::Content (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
97 , _position (c.front()->position ())
98 , _trim_start (c.front()->trim_start ())
99 , _trim_end (c.back()->trim_end ())
100 , _change_signals_frequent (false)
102 for (size_t i = 0; i < c.size(); ++i) {
103 if (i > 0 && c[i]->trim_start() > DCPTime()) {
104 throw JoinError (_("Only the first piece of content to be joined can have a start trim."));
107 if (i < (c.size() - 1) && c[i]->trim_end () > DCPTime()) {
108 throw JoinError (_("Only the last piece of content to be joined can have an end trim."));
111 for (size_t j = 0; j < c[i]->number_of_paths(); ++j) {
112 _paths.push_back (c[i]->path (j));
118 Content::as_xml (xmlpp::Node* node) const
120 boost::mutex::scoped_lock lm (_mutex);
122 for (vector<boost::filesystem::path>::const_iterator i = _paths.begin(); i != _paths.end(); ++i) {
123 node->add_child("Path")->add_child_text (i->string ());
125 node->add_child("Digest")->add_child_text (_digest);
126 node->add_child("Position")->add_child_text (lexical_cast<string> (_position.get ()));
127 node->add_child("TrimStart")->add_child_text (lexical_cast<string> (_trim_start.get ()));
128 node->add_child("TrimEnd")->add_child_text (lexical_cast<string> (_trim_end.get ()));
132 Content::examine (shared_ptr<Job> job)
134 boost::mutex::scoped_lock lm (_mutex);
135 vector<boost::filesystem::path> p = _paths;
138 string const d = md5_digest (p, job);
145 Content::signal_changed (int p)
148 ui_signaller->emit (boost::bind (boost::ref (Changed), shared_from_this (), p, _change_signals_frequent));
153 Content::set_position (DCPTime p)
156 boost::mutex::scoped_lock lm (_mutex);
157 if (p == _position) {
164 signal_changed (ContentProperty::POSITION);
168 Content::set_trim_start (DCPTime t)
171 boost::mutex::scoped_lock lm (_mutex);
175 signal_changed (ContentProperty::TRIM_START);
179 Content::set_trim_end (DCPTime t)
182 boost::mutex::scoped_lock lm (_mutex);
186 signal_changed (ContentProperty::TRIM_END);
191 Content::clone () const
193 shared_ptr<const Film> film = _film.lock ();
195 return shared_ptr<Content> ();
198 /* This is a bit naughty, but I can't think of a compelling reason not to do it ... */
200 xmlpp::Node* node = doc.create_root_node ("Content");
203 /* notes is unused here (we assume) */
205 return content_factory (film, cxml::NodePtr (new cxml::Node (node)), Film::current_state_version, notes);
209 Content::technical_summary () const
211 return String::compose ("%1 %2 %3", path_summary(), digest(), position().seconds());
215 Content::length_after_trim () const
217 return full_length() - trim_start() - trim_end();
220 /** @return string which includes everything about how this content affects
224 Content::identifier () const
228 s << Content::digest()
229 << "_" << position().get()
230 << "_" << trim_start().get()
231 << "_" << trim_end().get();
237 Content::paths_valid () const
239 for (vector<boost::filesystem::path>::const_iterator i = _paths.begin(); i != _paths.end(); ++i) {
240 if (!boost::filesystem::exists (*i)) {
249 Content::set_path (boost::filesystem::path path)
252 _paths.push_back (path);
253 signal_changed (ContentProperty::PATH);
257 Content::path_summary () const
259 /* XXX: should handle multiple paths more gracefully */
261 assert (number_of_paths ());
263 string s = path(0).filename().string ();
264 if (number_of_paths() > 1) {