X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fcontent.cc;h=af85e0ff08d17fcbf7fd4111ce27988d9fe405dd;hb=7998c12eb59c07f583db27a250ff566b543bf40b;hp=6a33e9f7e27ce8961ce6439d648138cf891af7ce;hpb=883d885dc8690519d205c8baa275385af8a39f4b;p=dcpomatic.git

diff --git a/src/lib/content.cc b/src/lib/content.cc
index 6a33e9f7e..af85e0ff0 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,82 +17,281 @@
 
 */
 
-#include <boost/thread/mutex.hpp>
-#include <libxml++/libxml++.h>
-#include <libcxml/cxml.h>
+/** @file  src/lib/content.cc
+ *  @brief Content class.
+ */
+
 #include "content.h"
 #include "util.h"
+#include "content_factory.h"
+#include "exceptions.h"
+#include "film.h"
+#include "safe_stringstream.h"
+#include "job.h"
+#include "compose.hpp"
+#include "raw_convert.h"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <boost/thread/mutex.hpp>
+#include <iostream>
+
+#include "i18n.h"
 
 using std::string;
+using std::list;
+using std::cout;
+using std::vector;
+using std::max;
+using std::pair;
 using boost::shared_ptr;
-using boost::lexical_cast;
 
-int const ContentProperty::START = 400;
-int const ContentProperty::LENGTH = 401;
+int const ContentProperty::PATH = 400;
+int const ContentProperty::POSITION = 401;
+int const ContentProperty::LENGTH = 402;
+int const ContentProperty::TRIM_START = 403;
+int const ContentProperty::TRIM_END = 404;
 
-Content::Content (shared_ptr<const Film> f, Time s)
-	: _film (f)
-	, _start (s)
+Content::Content (shared_ptr<const Film> film)
+	: _film (film)
+	, _position (0)
+	, _trim_start (0)
+	, _trim_end (0)
+	, _change_signals_frequent (false)
 {
 
 }
 
-Content::Content (shared_ptr<const Film> f, boost::filesystem::path p)
-	: _film (f)
-	, _file (p)
-	, _start (0)
+Content::Content (shared_ptr<const Film> film, DCPTime p)
+	: _film (film)
+	, _position (p)
+	, _trim_start (0)
+	, _trim_end (0)
+	, _change_signals_frequent (false)
 {
 
 }
 
-Content::Content (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
-	: _film (f)
+Content::Content (shared_ptr<const Film> film, boost::filesystem::path p)
+	: _film (film)
+	, _position (0)
+	, _trim_start (0)
+	, _trim_end (0)
+	, _change_signals_frequent (false)
+{
+	_paths.push_back (p);
+}
+
+Content::Content (shared_ptr<const Film> film, cxml::ConstNodePtr node)
+	: _film (film)
+	, _change_signals_frequent (false)
 {
-	_file = node->string_child ("File");
-	_digest = node->string_child ("Digest");
-	_start = node->number_child<Time> ("Start");
+	list<cxml::NodePtr> path_children = node->node_children ("Path");
+	for (list<cxml::NodePtr>::const_iterator i = path_children.begin(); i != path_children.end(); ++i) {
+		_paths.push_back ((*i)->content ());
+	}
+	_digest = node->optional_string_child ("Digest").get_value_or ("X");
+	_position = DCPTime (node->number_child<DCPTime::Type> ("Position"));
+	_trim_start = ContentTime (node->number_child<ContentTime::Type> ("TrimStart"));
+	_trim_end = ContentTime (node->number_child<ContentTime::Type> ("TrimEnd"));
 }
 
-Content::Content (Content const & o)
-	: boost::enable_shared_from_this<Content> (o)
-	, _film (o._film)
-	, _file (o._file)
-	, _digest (o._digest)
-	, _start (o._start)
+Content::Content (shared_ptr<const Film> film, vector<shared_ptr<Content> > c)
+	: _film (film)
+	, _position (c.front()->position ())
+	, _trim_start (c.front()->trim_start ())
+	, _trim_end (c.back()->trim_end ())
+	, _change_signals_frequent (false)
 {
+	for (size_t i = 0; i < c.size(); ++i) {
+		if (i > 0 && c[i]->trim_start() > ContentTime ()) {
+			throw JoinError (_("Only the first piece of content to be joined can have a start trim."));
+		}
+
+		if (i < (c.size() - 1) && c[i]->trim_end () > ContentTime ()) {
+			throw JoinError (_("Only the last piece of content to be joined can have an end trim."));
+		}
 
+		for (size_t j = 0; j < c[i]->number_of_paths(); ++j) {
+			_paths.push_back (c[i]->path (j));
+		}
+	}
 }
 
 void
 Content::as_xml (xmlpp::Node* node) const
 {
 	boost::mutex::scoped_lock lm (_mutex);
-	node->add_child("File")->add_child_text (_file.string());
+
+	for (vector<boost::filesystem::path>::const_iterator i = _paths.begin(); i != _paths.end(); ++i) {
+		node->add_child("Path")->add_child_text (i->string ());
+	}
 	node->add_child("Digest")->add_child_text (_digest);
-	node->add_child("Start")->add_child_text (lexical_cast<string> (_start));
+	node->add_child("Position")->add_child_text (raw_convert<string> (_position.get ()));
+	node->add_child("TrimStart")->add_child_text (raw_convert<string> (_trim_start.get ()));
+	node->add_child("TrimEnd")->add_child_text (raw_convert<string> (_trim_end.get ()));
 }
 
 void
-Content::examine (shared_ptr<Job>)
+Content::examine (shared_ptr<Job> job)
 {
-	string const d = md5_digest (_file);
+	if (job) {
+		job->sub (_("Computing digest"));
+	}
+
 	boost::mutex::scoped_lock lm (_mutex);
+	vector<boost::filesystem::path> p = _paths;
+	lm.unlock ();
+
+	/* Some content files are very big, so we use a poor man's
+	   digest here: a MD5 of the first and last 1e6 bytes with the
+	   size of the first file tacked on the end as a string.
+	*/
+	string const d = md5_digest_head_tail (p, 1000000) + raw_convert<string> (boost::filesystem::file_size (p.front ()));
+
+	lm.lock ();
 	_digest = d;
 }
 
 void
 Content::signal_changed (int p)
 {
-	Changed (shared_from_this (), p);
+	emit (boost::bind (boost::ref (Changed), shared_from_this (), p, _change_signals_frequent));
 }
 
 void
-Content::set_start (Time s)
+Content::set_position (DCPTime p)
 {
 	{
 		boost::mutex::scoped_lock lm (_mutex);
-		_start = s;
+		if (p == _position) {
+			return;
+		}
+
+		_position = p;
+	}
+
+	signal_changed (ContentProperty::POSITION);
+}
+
+void
+Content::set_trim_start (ContentTime t)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_trim_start = t;
 	}
 
-	signal_changed (ContentProperty::START);
+	signal_changed (ContentProperty::TRIM_START);
+}
+
+void
+Content::set_trim_end (ContentTime t)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_trim_end = t;
+	}
+
+	signal_changed (ContentProperty::TRIM_END);
+}
+
+
+shared_ptr<Content>
+Content::clone () const
+{
+	shared_ptr<const Film> film = _film.lock ();
+	if (!film) {
+		return shared_ptr<Content> ();
+	}
+
+	/* This is a bit naughty, but I can't think of a compelling reason not to do it ... */
+	xmlpp::Document doc;
+	xmlpp::Node* node = doc.create_root_node ("Content");
+	as_xml (node);
+
+	/* notes is unused here (we assume) */
+	list<string> notes;
+	return content_factory (film, cxml::NodePtr (new cxml::Node (node)), Film::current_state_version, notes);
+}
+
+string
+Content::technical_summary () const
+{
+	return String::compose ("%1 %2 %3", path_summary(), digest(), position().seconds());
+}
+
+DCPTime
+Content::length_after_trim () const
+{
+	return max (DCPTime (), full_length() - DCPTime (trim_start() + trim_end(), film()->active_frame_rate_change (position ())));
+}
+
+/** @return string which changes when something about this content changes which affects
+ *  the appearance of its video.
+ */
+string
+Content::identifier () const
+{
+	SafeStringStream s;
+
+	s << Content::digest()
+	  << "_" << position().get()
+	  << "_" << trim_start().get()
+	  << "_" << trim_end().get();
+
+	return s.str ();
+}
+
+bool
+Content::paths_valid () const
+{
+	for (vector<boost::filesystem::path>::const_iterator i = _paths.begin(); i != _paths.end(); ++i) {
+		if (!boost::filesystem::exists (*i)) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+void
+Content::set_path (boost::filesystem::path path)
+{
+	_paths.clear ();
+	_paths.push_back (path);
+	signal_changed (ContentProperty::PATH);
+}
+
+string
+Content::path_summary () const
+{
+	/* XXX: should handle multiple paths more gracefully */
+
+	DCPOMATIC_ASSERT (number_of_paths ());
+
+	string s = path(0).filename().string ();
+	if (number_of_paths() > 1) {
+		s += " ...";
+	}
+
+	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
+{
+	list<pair<string, string> > 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;
 }