Hand-apply bbfb370d7de28ec1e8f307865cc6253bb5d4366e from master; quicker digest calcu...

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

diff --git a/src/lib/content.h b/src/lib/content.h
index 4ee7c267f354c5cf65da2f1c948f3b8d93b79424..c6cede5fa6cafde4d04f18dc1943a3551c858a2c 100644 (file)
--- a/src/lib/content.h
+++ b/src/lib/content.h
@@ -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
@@ -17,16 +17,21 @@
 
 */
 
+/** @file  src/lib/content.h
+ *  @brief Content class.
+ */
+
 #ifndef DCPOMATIC_CONTENT_H
 #define DCPOMATIC_CONTENT_H
 
-#include <set>
+#include "types.h"
+#include "dcpomatic_time.h"
+#include <libxml++/libxml++.h>
+#include <libcxml/cxml.h>
 #include <boost/filesystem.hpp>
 #include <boost/signals2.hpp>
 #include <boost/thread/mutex.hpp>
 #include <boost/enable_shared_from_this.hpp>
-#include <libxml++/libxml++.h>
-#include "types.h"
 
 namespace cxml {
        class Node;
@@ -45,22 +50,37 @@ public:
        static int const TRIM_END;
 };
 
+/** @class Content
+ *  @brief A piece of content represented by one or more files on disk.
+ */
 class Content : public boost::enable_shared_from_this<Content>, public boost::noncopyable
 {
 public:
        Content (boost::shared_ptr<const Film>);
-       Content (boost::shared_ptr<const Film>, Time);
+       Content (boost::shared_ptr<const Film>, DCPTime);
        Content (boost::shared_ptr<const Film>, boost::filesystem::path);
-       Content (boost::shared_ptr<const Film>, boost::shared_ptr<const cxml::Node>);
+       Content (boost::shared_ptr<const Film>, cxml::ConstNodePtr);
        Content (boost::shared_ptr<const Film>, std::vector<boost::shared_ptr<Content> >);
        virtual ~Content () {}
+
+       /** Examine the content to establish digest, frame rates and any other
+        *  useful metadata.
+        *  @param job Job to use to report progress, or 0.
+        */
+       virtual void examine (boost::shared_ptr<Job> job);
        
-       virtual void examine (boost::shared_ptr<Job>);
+       /** @return Quick one-line summary of the content, as will be presented in the
+        *  film editor.
+        */
        virtual std::string summary () const = 0;
+       
+       /** @return Technical details of this content; these are written to logs to
+        *  help with debugging.
+        */
        virtual std::string technical_summary () const;
-       virtual std::string information () const = 0;
+       
        virtual void as_xml (xmlpp::Node *) const;
-       virtual Time full_length () const = 0;
+       virtual DCPTime full_length () const = 0;
        virtual std::string identifier () const;
 
        boost::shared_ptr<Content> clone () const;
@@ -86,47 +106,52 @@ public:
        
        bool paths_valid () const;
 
-       /** @return MD5 digest of the content's file(s) */
+       /** @return Digest of the content's file(s).  Note: this is
+        *  not a complete MD5-or-whatever hash, but a sort of poor
+        *  man' version (see comments in ::examine).
+        */
        std::string digest () const {
                boost::mutex::scoped_lock lm (_mutex);
                return _digest;
        }
 
-       void set_position (Time);
+       void set_position (DCPTime);
 
-       /** Time that this content starts; i.e. the time that the first
+       /** DCPTime that this content starts; i.e. the time that the first
         *  bit of the content (trimmed or not) will happen.
         */
-       Time position () const {
+       DCPTime position () const {
                boost::mutex::scoped_lock lm (_mutex);
                return _position;
        }
 
-       void set_trim_start (Time);
+       void set_trim_start (DCPTime);
 
-       Time trim_start () const {
+       DCPTime trim_start () const {
                boost::mutex::scoped_lock lm (_mutex);
                return _trim_start;
        }
 
-       void set_trim_end (Time);
+       void set_trim_end (DCPTime);
        
-       Time trim_end () const {
+       DCPTime trim_end () const {
                boost::mutex::scoped_lock lm (_mutex);
                return _trim_end;
        }
        
-       Time end () const {
-               return position() + length_after_trim() - 1;
+       DCPTime end () const {
+               return position() + length_after_trim();
        }
 
-       Time length_after_trim () const;
+       DCPTime length_after_trim () const;
        
        void set_change_signals_frequent (bool f) {
                _change_signals_frequent = f;
        }
 
-       bool trimmed (Time) const;
+       boost::shared_ptr<const Film> film () const {
+               return _film.lock ();
+       }
 
        boost::signals2::signal<void (boost::weak_ptr<Content>, int, bool)> Changed;
 
@@ -136,8 +161,8 @@ protected:
        boost::weak_ptr<const Film> _film;
 
        /** _mutex which should be used to protect accesses, as examine
-           jobs can update content state in threads other than the main one.
-       */
+        *  jobs can update content state in threads other than the main one.
+        */
        mutable boost::mutex _mutex;
 
        /** Paths of our data files */
@@ -145,9 +170,9 @@ protected:
        
 private:
        std::string _digest;
-       Time _position;
-       Time _trim_start;
-       Time _trim_end;
+       DCPTime _position;
+       DCPTime _trim_start;
+       DCPTime _trim_end;
        bool _change_signals_frequent;
 };