X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Flib%2Fcontent.cc;h=49ab944be54c79c3d478469ad09762a9555768fe;hb=48bfa4b2040d2bacd6befdab6c12b2ee3e9be5a1;hp=578dafd675807fa8a13e8b9ef0a4852638ee6b82;hpb=237a0052c60af768f4d62b00321932918b7ba4d9;p=dcpomatic.git

diff --git a/src/lib/content.cc b/src/lib/content.cc
index 578dafd67..49ab944be 100644
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -1,76 +1,543 @@
-/* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
-
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
 
-    This program is free software; you can redistribute it and/or modify
+    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/>.
 
 */
 
-#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 "change_signaller.h"
 #include "util.h"
+#include "content_factory.h"
+#include "video_content.h"
+#include "audio_content.h"
+#include "text_content.h"
+#include "exceptions.h"
+#include "film.h"
+#include "job.h"
+#include "compose.hpp"
+#include <dcp/locale_convert.h>
+#include <dcp/raw_convert.h>
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <boost/thread/mutex.hpp>
+#include <iostream>
+
+#include "i18n.h"
+
 
+using std::cout;
+using std::list;
+using std::make_shared;
+using std::max;
+using std::pair;
+using std::shared_ptr;
 using std::string;
-using boost::shared_ptr;
-using boost::lexical_cast;
+using std::vector;
+using boost::optional;
+using dcp::locale_convert;
+using dcp::raw_convert;
+using namespace dcpomatic;
+
+
+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;
+int const ContentProperty::VIDEO_FRAME_RATE = 405;
 
-Content::Content (boost::filesystem::path f)
-	: _file (f)
-	, _time (0)
+
+Content::Content ()
+	: _change_signals_frequent (false)
 {
 
 }
 
-Content::Content (shared_ptr<const cxml::Node> node)
+
+Content::Content (DCPTime p)
+	: _position (p)
+	, _change_signals_frequent (false)
 {
-	_file = node->string_child ("File");
-	_digest = node->string_child ("Digest");
-	_time = node->number_child<Time> ("Time");
+
 }
 
-Content::Content (Content const & o)
-	: boost::enable_shared_from_this<Content> (o)
-	, _file (o._file)
-	, _digest (o._digest)
-	, _time (o._time)
+
+Content::Content (boost::filesystem::path p)
+	: _change_signals_frequent (false)
 {
+	add_path (p);
+}
 
+
+Content::Content (cxml::ConstNodePtr node)
+	: _change_signals_frequent (false)
+{
+	for (auto i: node->node_children("Path")) {
+		_paths.push_back (i->content());
+		auto const mod = i->optional_number_attribute<time_t>("mtime");
+		if (mod) {
+			_last_write_times.push_back (*mod);
+		} else {
+			boost::system::error_code ec;
+			auto last_write = boost::filesystem::last_write_time(i->content(), ec);
+			_last_write_times.push_back (ec ? 0 : last_write);
+		}
+	}
+	_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"));
+	_video_frame_rate = node->optional_number_child<double> ("VideoFrameRate");
+}
+
+
+Content::Content (vector<shared_ptr<Content>> c)
+	: _position (c.front()->position())
+	, _trim_start (c.front()->trim_start())
+	, _trim_end (c.back()->trim_end())
+	, _video_frame_rate (c.front()->video_frame_rate())
+	, _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."));
+		}
+
+		if (
+			(_video_frame_rate && !c[i]->_video_frame_rate) ||
+			(!_video_frame_rate && c[i]->_video_frame_rate)
+			) {
+			throw JoinError (_("Content to be joined must have the same video frame rate"));
+		}
+
+		if (_video_frame_rate && fabs (_video_frame_rate.get() - c[i]->_video_frame_rate.get()) > VIDEO_FRAME_RATE_EPSILON) {
+			throw JoinError (_("Content to be joined must have the same video frame rate"));
+		}
+
+		for (size_t j = 0; j < c[i]->number_of_paths(); ++j) {
+			_paths.push_back (c[i]->path(j));
+			_last_write_times.push_back (c[i]->_last_write_times[j]);
+		}
+	}
 }
 
+
 void
-Content::as_xml (xmlpp::Node* node) const
+Content::as_xml (xmlpp::Node* node, bool with_paths) const
 {
 	boost::mutex::scoped_lock lm (_mutex);
-	node->add_child("File")->add_child_text (_file.string());
-	node->add_child("Digest")->add_child_text (_digest);
-	node->add_child("Time")->add_child_text (lexical_cast<string> (_time));
+
+	if (with_paths) {
+		for (size_t i = 0; i < _paths.size(); ++i) {
+			auto p = node->add_child("Path");
+			p->add_child_text (_paths[i].string());
+			p->set_attribute ("mtime", raw_convert<string>(_last_write_times[i]));
+		}
+	}
+	node->add_child("Digest")->add_child_text(_digest);
+	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()));
+	if (_video_frame_rate) {
+		node->add_child("VideoFrameRate")->add_child_text(raw_convert<string>(_video_frame_rate.get()));
+	}
 }
 
+
+string
+Content::calculate_digest () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	auto p = _paths;
+	lm.unlock ();
+
+	/* Some content files are very big, so we use a poor man's
+	   digest here: a digest of the first and last 1e6 bytes with the
+	   size of the first file tacked on the end as a string.
+	*/
+	return digest_head_tail(p, 1000000) + raw_convert<string>(boost::filesystem::file_size(p.front()));
+}
+
+
 void
-Content::examine (shared_ptr<Film>, shared_ptr<Job>, bool)
+Content::examine (shared_ptr<const Film>, shared_ptr<Job> job)
 {
-	string const d = md5_digest (_file);
+	if (job) {
+		job->sub (_("Computing digest"));
+	}
+
+	auto const d = calculate_digest ();
+
 	boost::mutex::scoped_lock lm (_mutex);
 	_digest = d;
+
+	_last_write_times.clear ();
+	for (auto i: _paths) {
+		boost::system::error_code ec;
+		auto last_write = boost::filesystem::last_write_time(i, ec);
+		_last_write_times.push_back (ec ? 0 : last_write);
+	}
+}
+
+
+void
+Content::signal_change (ChangeType c, int p)
+{
+	try {
+		if (c == ChangeType::PENDING || c == ChangeType::CANCELLED) {
+			Change (c, shared_from_this(), p, _change_signals_frequent);
+		} else {
+			emit (boost::bind (boost::ref(Change), c, shared_from_this(), p, _change_signals_frequent));
+		}
+	} catch (std::bad_weak_ptr &) {
+		/* This must be during construction; never mind */
+	}
+}
+
+
+void
+Content::set_position (shared_ptr<const Film> film, DCPTime p, bool force_emit)
+{
+	/* video and audio content can modify its position */
+
+	if (video) {
+		video->modify_position (film, p);
+	}
+
+	/* Only allow the audio to modify if we have no video;
+	   sometimes p can't be on an integer video AND audio frame,
+	   and in these cases we want the video constraint to be
+	   satisfied since (I think) the audio code is better able to
+	   cope.
+	*/
+	if (!video && audio) {
+		audio->modify_position (film, p);
+	}
+
+	ContentChangeSignaller cc (this, ContentProperty::POSITION);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		if (p == _position && !force_emit) {
+			cc.abort ();
+			return;
+		}
+
+		_position = p;
+	}
+}
+
+
+void
+Content::set_trim_start (ContentTime t)
+{
+	/* video and audio content can modify its start trim */
+
+	if (video) {
+		video->modify_trim_start (t);
+	}
+
+	/* See note in ::set_position */
+	if (!video && audio) {
+		audio->modify_trim_start (t);
+	}
+
+	ContentChangeSignaller cc (this, ContentProperty::TRIM_START);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_trim_start = t;
+	}
+}
+
+
+void
+Content::set_trim_end (ContentTime t)
+{
+	ContentChangeSignaller cc (this, ContentProperty::TRIM_END);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_trim_end = t;
+	}
+}
+
+
+shared_ptr<Content>
+Content::clone () const
+{
+	/* This is a bit naughty, but I can't think of a compelling reason not to do it ... */
+	xmlpp::Document doc;
+	auto node = doc.create_root_node ("Content");
+	as_xml (node, true);
+
+	/* notes is unused here (we assume) */
+	list<string> notes;
+	return content_factory (make_shared<cxml::Node>(node), Film::current_state_version, notes);
+}
+
+
+string
+Content::technical_summary () const
+{
+	auto s = String::compose ("%1 %2 %3", path_summary(), digest(), position().seconds());
+	if (_video_frame_rate) {
+		s += String::compose(" %1", *_video_frame_rate);
+	}
+	return s;
+}
+
+
+DCPTime
+Content::length_after_trim (shared_ptr<const Film> film) const
+{
+	auto length = max(DCPTime(), full_length(film) - DCPTime(trim_start() + trim_end(), film->active_frame_rate_change(position())));
+	if (video) {
+		length = length.round(film->video_frame_rate());
+	}
+	return length;
+}
+
+
+/** @return string which changes when something about this content changes which affects
+ *  the appearance of its video.
+ */
+string
+Content::identifier () const
+{
+	char buffer[256];
+	snprintf (
+		buffer, sizeof(buffer), "%s_%" PRId64 "_%" PRId64 "_%" PRId64,
+		Content::digest().c_str(), position().get(), trim_start().get(), trim_end().get()
+		);
+	return buffer;
+}
+
+
+bool
+Content::paths_valid () const
+{
+	for (auto i: _paths) {
+		if (!boost::filesystem::exists (i)) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+
+void
+Content::set_paths (vector<boost::filesystem::path> paths)
+{
+	ContentChangeSignaller cc (this, ContentProperty::PATH);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_paths = paths;
+		_last_write_times.clear ();
+		for (auto i: _paths) {
+			boost::system::error_code ec;
+			auto last_write = boost::filesystem::last_write_time(i, ec);
+			_last_write_times.push_back (ec ? 0 : last_write);
+		}
+	}
+}
+
+
+string
+Content::path_summary () const
+{
+	/* XXX: should handle multiple paths more gracefully */
+
+	DCPOMATIC_ASSERT (number_of_paths ());
+
+	auto 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 */
+list<UserProperty>
+Content::user_properties (shared_ptr<const Film> film) const
+{
+	list<UserProperty> p;
+	add_properties (film, p);
+	return p;
+}
+
+
+/** @return DCP times of points within this content where a reel split could occur */
+list<DCPTime>
+Content::reel_split_points (shared_ptr<const Film>) const
+{
+	list<DCPTime> t;
+	/* This is only called for video content and such content has its position forced
+	   to start on a frame boundary.
+	*/
+	t.push_back (position());
+	return t;
+}
+
+
+void
+Content::set_video_frame_rate (double r)
+{
+	ContentChangeSignaller cc (this, ContentProperty::VIDEO_FRAME_RATE);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		if (_video_frame_rate && fabs(r - *_video_frame_rate) < VIDEO_FRAME_RATE_EPSILON) {
+			cc.abort();
+		}
+		_video_frame_rate = r;
+	}
+
+	/* Make sure trim is still on a frame boundary */
+	if (video) {
+		set_trim_start (trim_start());
+	}
+}
+
+
+void
+Content::unset_video_frame_rate ()
+{
+	ContentChangeSignaller cc (this, ContentProperty::VIDEO_FRAME_RATE);
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_video_frame_rate = optional<double>();
+	}
+}
+
+
+double
+Content::active_video_frame_rate (shared_ptr<const Film> film) 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.
+	*/
+	return film->active_frame_rate_change(position()).source;
 }
 
+
 void
-Content::signal_changed (int p)
+Content::add_properties (shared_ptr<const Film>, list<UserProperty>& p) const
 {
-	Changed (shared_from_this (), p);
+	p.push_back (UserProperty (UserProperty::GENERAL, _("Filename"), path(0).string ()));
+
+	if (_video_frame_rate) {
+		if (video) {
+			p.push_back (
+				UserProperty (
+					UserProperty::VIDEO,
+					_("Frame rate"),
+					locale_convert<string> (_video_frame_rate.get(), 5),
+					_("frames per second")
+					)
+				);
+		} else {
+			p.push_back (
+				UserProperty (
+					UserProperty::GENERAL,
+					_("Prepared for video frame rate"),
+					locale_convert<string> (_video_frame_rate.get(), 5),
+					_("frames per second")
+					)
+				);
+		}
+	}
+}
+
+
+/** Take settings from the given content if it is of the correct type */
+void
+Content::take_settings_from (shared_ptr<const Content> c)
+{
+	if (video && c->video) {
+		video->take_settings_from (c->video);
+	}
+	if (audio && c->audio) {
+		audio->take_settings_from (c->audio);
+	}
+
+	auto i = text.begin ();
+	auto j = c->text.begin ();
+	while (i != text.end() && j != c->text.end()) {
+		(*i)->take_settings_from (*j);
+		++i;
+		++j;
+ 	}
+}
+
+
+shared_ptr<TextContent>
+Content::only_text () const
+{
+	DCPOMATIC_ASSERT (text.size() < 2);
+	if (text.empty()) {
+		return {};
+	}
+	return text.front ();
+}
+
+
+shared_ptr<TextContent>
+Content::text_of_original_type (TextType type) const
+{
+	for (auto i: text) {
+		if (i->original_type() == type) {
+			return i;
+		}
+	}
+
+	return {};
+}
+
+
+void
+Content::add_path (boost::filesystem::path p)
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	_paths.push_back (p);
+	boost::system::error_code ec;
+	auto last_write = boost::filesystem::last_write_time(p, ec);
+	_last_write_times.push_back (ec ? 0 : last_write);
 }