/*
    Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>

    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.

    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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.

*/

/** @file  src/film.cc
 *  @brief A representation of some audio and video content, and details of
 *  how they should be presented in a DCP.
 */

#include "film.h"
#include "job.h"
#include "util.h"
#include "job_manager.h"
#include "transcode_job.h"
#include "upload_job.h"
#include "null_log.h"
#include "file_log.h"
#include "exceptions.h"
#include "examine_content_job.h"
#include "config.h"
#include "playlist.h"
#include "dcp_content_type.h"
#include "ratio.h"
#include "cross.h"
#include "environment_info.h"
#include "audio_processor.h"
#include "digester.h"
#include "compose.hpp"
#include "screen.h"
#include "audio_content.h"
#include "video_content.h"
#include "subtitle_content.h"
#include "ffmpeg_content.h"
#include "dcp_content.h"
#include "screen_kdm.h"
#include "cinema.h"
#include <libcxml/cxml.h>
#include <dcp/cpl.h>
#include <dcp/certificate_chain.h>
#include <dcp/util.h>
#include <dcp/local_time.h>
#include <dcp/decrypted_kdm.h>
#include <dcp/raw_convert.h>
#include <libxml++/libxml++.h>
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/foreach.hpp>
#include <boost/regex.hpp>
#include <unistd.h>
#include <stdexcept>
#include <iostream>
#include <algorithm>
#include <cstdlib>
#include <iomanip>
#include <set>

#include "i18n.h"

using std::string;
using std::pair;
using std::vector;
using std::setfill;
using std::min;
using std::max;
using std::make_pair;
using std::cout;
using std::list;
using std::set;
using std::runtime_error;
using boost::shared_ptr;
using boost::weak_ptr;
using boost::dynamic_pointer_cast;
using boost::optional;
using boost::is_any_of;
using dcp::raw_convert;

#define LOG_GENERAL(...) log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
#define LOG_GENERAL_NC(...) log()->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);

/* 5 -> 6
 * AudioMapping XML changed.
 * 6 -> 7
 * Subtitle offset changed to subtitle y offset, and subtitle x offset added.
 * 7 -> 8
 * Use <Scale> tag in <VideoContent> rather than <Ratio>.
 * 8 -> 9
 * DCI -> ISDCF
 * 9 -> 10
 * Subtitle X and Y scale.
 *
 * Bumped to 32 for 2.0 branch; some times are expressed in Times rather
 * than frames now.
 *
 * 32 -> 33
 * Changed <Period> to <Subtitle> in FFmpegSubtitleStream
 * 33 -> 34
 * Content only contains audio/subtitle-related tags if those things
 * are present.
 * 34 -> 35
 * VideoFrameType in VideoContent is a string rather than an integer.
 * 35 -> 36
 * EffectColour rather than OutlineColour in Subtitle.
 */
int const Film::current_state_version = 36;

/** Construct a Film object in a given directory.
 *
 *  @param dir Film directory.
 */

Film::Film (optional<boost::filesystem::path> dir)
	: _playlist (new Playlist)
	, _use_isdcf_name (true)
	, _dcp_content_type (Config::instance()->default_dcp_content_type ())
	, _container (Config::instance()->default_container ())
	, _resolution (RESOLUTION_2K)
	, _signed (true)
	, _encrypted (false)
	, _j2k_bandwidth (Config::instance()->default_j2k_bandwidth ())
	, _isdcf_metadata (Config::instance()->default_isdcf_metadata ())
	, _video_frame_rate (24)
	, _audio_channels (Config::instance()->default_dcp_audio_channels ())
	, _three_d (false)
	, _sequence (true)
	, _interop (Config::instance()->default_interop ())
	, _audio_processor (0)
	, _reel_type (REELTYPE_SINGLE)
	, _reel_length (2000000000)
	, _upload_after_make_dcp (false)
	, _state_version (current_state_version)
	, _dirty (false)
{
	set_isdcf_date_today ();

	_playlist_changed_connection = _playlist->Changed.connect (bind (&Film::playlist_changed, this));
	_playlist_order_changed_connection = _playlist->OrderChanged.connect (bind (&Film::playlist_order_changed, this));
	_playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Film::playlist_content_changed, this, _1, _2, _3));

	if (dir) {
		/* Make state.directory a complete path without ..s (where possible)
		   (Code swiped from Adam Bowen on stackoverflow)
		   XXX: couldn't/shouldn't this just be boost::filesystem::canonical?
		*/

		boost::filesystem::path p (boost::filesystem::system_complete (dir.get()));
		boost::filesystem::path result;
		for (boost::filesystem::path::iterator i = p.begin(); i != p.end(); ++i) {
			if (*i == "..") {
				if (boost::filesystem::is_symlink (result) || result.filename() == "..") {
					result /= *i;
				} else {
					result = result.parent_path ();
				}
			} else if (*i != ".") {
				result /= *i;
			}
		}

		set_directory (result.make_preferred ());
	}

	if (_directory) {
		_log.reset (new FileLog (file ("log")));
	} else {
		_log.reset (new NullLog);
	}

	_playlist->set_sequence (_sequence);
}

Film::~Film ()
{
	BOOST_FOREACH (boost::signals2::connection& i, _job_connections) {
		i.disconnect ();
	}

	BOOST_FOREACH (boost::signals2::connection& i, _audio_analysis_connections) {
		i.disconnect ();
	}
}

string
Film::video_identifier () const
{
	DCPOMATIC_ASSERT (container ());

	string s = container()->id()
		+ "_" + resolution_to_string (_resolution)
		+ "_" + _playlist->video_identifier()
		+ "_" + raw_convert<string>(_video_frame_rate)
		+ "_" + raw_convert<string>(j2k_bandwidth());

	if (encrypted ()) {
		s += "_E";
	} else {
		s += "_P";
	}

	if (_interop) {
		s += "_I";
	} else {
		s += "_S";
	}

	if (_three_d) {
		s += "_3D";
	}

	return s;
}

/** @return The file to write video frame info to */
boost::filesystem::path
Film::info_file (DCPTimePeriod period) const
{
	boost::filesystem::path p;
	p /= "info";
	p /= video_identifier () + "_" + raw_convert<string> (period.from.get()) + "_" + raw_convert<string> (period.to.get());
	return file (p);
}

boost::filesystem::path
Film::internal_video_asset_dir () const
{
	return dir ("video");
}

boost::filesystem::path
Film::internal_video_asset_filename (DCPTimePeriod p) const
{
	return video_identifier() + "_" + raw_convert<string> (p.from.get()) + "_" + raw_convert<string> (p.to.get()) + ".mxf";
}

boost::filesystem::path
Film::audio_analysis_path (shared_ptr<const Playlist> playlist) const
{
	boost::filesystem::path p = dir ("analysis");

	Digester digester;
	BOOST_FOREACH (shared_ptr<Content> i, playlist->content ()) {
		if (!i->audio) {
			continue;
		}

		digester.add (i->digest ());
		digester.add (i->audio->mapping().digest ());
		if (playlist->content().size() != 1) {
			/* Analyses should be considered equal regardless of gain
			   if they were made from just one piece of content.  This
			   is because we can fake any gain change in a single-content
			   analysis at the plotting stage rather than having to
			   recompute it.
			*/
			digester.add (i->audio->gain ());
		}
	}

	if (audio_processor ()) {
		digester.add (audio_processor()->id ());
	}

	p /= digester.get ();
	return p;
}

/** Add suitable Jobs to the JobManager to create a DCP for this Film */
void
Film::make_dcp ()
{
	if (dcp_name().find ("/") != string::npos) {
		throw BadSettingError (_("name"), _("cannot contain slashes"));
	}

	set_isdcf_date_today ();

	BOOST_FOREACH (string i, environment_info ()) {
		LOG_GENERAL_NC (i);
	}

	BOOST_FOREACH (shared_ptr<const Content> i, content ()) {
		LOG_GENERAL ("Content: %1", i->technical_summary());
	}
	LOG_GENERAL ("DCP video rate %1 fps", video_frame_rate());
	if (Config::instance()->only_servers_encode ()) {
		LOG_GENERAL_NC ("0 threads: ONLY SERVERS SET TO ENCODE");
	} else {
		LOG_GENERAL ("%1 threads", Config::instance()->num_local_encoding_threads());
	}
	LOG_GENERAL ("J2K bandwidth %1", j2k_bandwidth());

	if (container() == 0) {
		throw MissingSettingError (_("container"));
	}

	if (content().empty()) {
		throw runtime_error (_("You must add some content to the DCP before creating it"));
	}

	if (dcp_content_type() == 0) {
		throw MissingSettingError (_("content type"));
	}

	if (name().empty()) {
		throw MissingSettingError (_("name"));
	}

	JobManager::instance()->add (shared_ptr<Job> (new TranscodeJob (shared_from_this())));
}

/** Start a job to send our DCP to the configured TMS */
void
Film::send_dcp_to_tms ()
{
	shared_ptr<Job> j (new UploadJob (shared_from_this()));
	JobManager::instance()->add (j);
}

shared_ptr<xmlpp::Document>
Film::metadata (bool with_content_paths) const
{
	shared_ptr<xmlpp::Document> doc (new xmlpp::Document);
	xmlpp::Element* root = doc->create_root_node ("Metadata");

	root->add_child("Version")->add_child_text (raw_convert<string> (current_state_version));
	root->add_child("Name")->add_child_text (_name);
	root->add_child("UseISDCFName")->add_child_text (_use_isdcf_name ? "1" : "0");

	if (_dcp_content_type) {
		root->add_child("DCPContentType")->add_child_text (_dcp_content_type->isdcf_name ());
	}

	if (_container) {
		root->add_child("Container")->add_child_text (_container->id ());
	}

	root->add_child("Resolution")->add_child_text (resolution_to_string (_resolution));
	root->add_child("J2KBandwidth")->add_child_text (raw_convert<string> (_j2k_bandwidth));
	_isdcf_metadata.as_xml (root->add_child ("ISDCFMetadata"));
	root->add_child("VideoFrameRate")->add_child_text (raw_convert<string> (_video_frame_rate));
	root->add_child("ISDCFDate")->add_child_text (boost::gregorian::to_iso_string (_isdcf_date));
	root->add_child("AudioChannels")->add_child_text (raw_convert<string> (_audio_channels));
	root->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
	root->add_child("Sequence")->add_child_text (_sequence ? "1" : "0");
	root->add_child("Interop")->add_child_text (_interop ? "1" : "0");
	root->add_child("Signed")->add_child_text (_signed ? "1" : "0");
	root->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
	root->add_child("Key")->add_child_text (_key.hex ());
	if (_audio_processor) {
		root->add_child("AudioProcessor")->add_child_text (_audio_processor->id ());
	}
	root->add_child("ReelType")->add_child_text (raw_convert<string> (static_cast<int> (_reel_type)));
	root->add_child("ReelLength")->add_child_text (raw_convert<string> (_reel_length));
	root->add_child("UploadAfterMakeDCP")->add_child_text (_upload_after_make_dcp ? "1" : "0");
	_playlist->as_xml (root->add_child ("Playlist"), with_content_paths);

	return doc;
}

/** Write state to our `metadata' file */
void
Film::write_metadata () const
{
	DCPOMATIC_ASSERT (directory());
	boost::filesystem::create_directories (directory().get());
	shared_ptr<xmlpp::Document> doc = metadata ();
	doc->write_to_file_formatted (file("metadata.xml").string ());
	_dirty = false;
}

/** Write a template from this film */
void
Film::write_template (boost::filesystem::path path) const
{
	boost::filesystem::create_directories (path.parent_path());
	shared_ptr<xmlpp::Document> doc = metadata (false);
	doc->write_to_file_formatted (path.string ());
}

/** Read state from our metadata file.
 *  @return Notes about things that the user should know about, or empty.
 */
list<string>
Film::read_metadata (optional<boost::filesystem::path> path)
{
	if (!path) {
		if (boost::filesystem::exists (file ("metadata")) && !boost::filesystem::exists (file ("metadata.xml"))) {
			throw runtime_error (_("This film was created with an older version of DCP-o-matic, and unfortunately it cannot be loaded into this version.  You will need to create a new Film, re-add your content and set it up again.  Sorry!"));
		}

		path = file ("metadata.xml");
	}

	cxml::Document f ("Metadata");
	f.read_file (path.get ());

	_state_version = f.number_child<int> ("Version");
	if (_state_version > current_state_version) {
		throw runtime_error (_("This film was created with a newer version of DCP-o-matic, and it cannot be loaded into this version.  Sorry!"));
	}

	_name = f.string_child ("Name");
	if (_state_version >= 9) {
		_use_isdcf_name = f.bool_child ("UseISDCFName");
		_isdcf_metadata = ISDCFMetadata (f.node_child ("ISDCFMetadata"));
		_isdcf_date = boost::gregorian::from_undelimited_string (f.string_child ("ISDCFDate"));
	} else {
		_use_isdcf_name = f.bool_child ("UseDCIName");
		_isdcf_metadata = ISDCFMetadata (f.node_child ("DCIMetadata"));
		_isdcf_date = boost::gregorian::from_undelimited_string (f.string_child ("DCIDate"));
	}

	{
		optional<string> c = f.optional_string_child ("DCPContentType");
		if (c) {
			_dcp_content_type = DCPContentType::from_isdcf_name (c.get ());
		}
	}

	{
		optional<string> c = f.optional_string_child ("Container");
		if (c) {
			_container = Ratio::from_id (c.get ());
		}
	}

	_resolution = string_to_resolution (f.string_child ("Resolution"));
	_j2k_bandwidth = f.number_child<int> ("J2KBandwidth");
	_video_frame_rate = f.number_child<int> ("VideoFrameRate");
	_signed = f.optional_bool_child("Signed").get_value_or (true);
	_encrypted = f.bool_child ("Encrypted");
	_audio_channels = f.number_child<int> ("AudioChannels");
	/* We used to allow odd numbers (and zero) channels, but it's just not worth
	   the pain.
	*/
	if (_audio_channels == 0) {
		_audio_channels = 2;
	} else if ((_audio_channels % 2) == 1) {
		_audio_channels++;
	}

	if (f.optional_bool_child("SequenceVideo")) {
		_sequence = f.bool_child("SequenceVideo");
	} else {
		_sequence = f.bool_child("Sequence");
	}

	_three_d = f.bool_child ("ThreeD");
	_interop = f.bool_child ("Interop");
	_key = dcp::Key (f.string_child ("Key"));

	if (f.optional_string_child ("AudioProcessor")) {
		_audio_processor = AudioProcessor::from_id (f.string_child ("AudioProcessor"));
	} else {
		_audio_processor = 0;
	}

	_reel_type = static_cast<ReelType> (f.optional_number_child<int>("ReelType").get_value_or (static_cast<int>(REELTYPE_SINGLE)));
	_reel_length = f.optional_number_child<int64_t>("ReelLength").get_value_or (2000000000);
	_upload_after_make_dcp = f.optional_bool_child("UploadAfterMakeDCP").get_value_or (false);

	list<string> notes;
	/* This method is the only one that can return notes (so far) */
	_playlist->set_from_xml (shared_from_this(), f.node_child ("Playlist"), _state_version, notes);

	/* Write backtraces to this film's directory, until another film is loaded */
	if (_directory) {
		set_backtrace_file (file ("backtrace.txt"));
	}

	_dirty = false;
	return notes;
}

/** Given a directory name, return its full path within the Film's directory.
 *  The directory (and its parents) will be created if they do not exist.
 */
boost::filesystem::path
Film::dir (boost::filesystem::path d) const
{
	DCPOMATIC_ASSERT (_directory);

	boost::filesystem::path p;
	p /= _directory.get();
	p /= d;

	boost::filesystem::create_directories (p);

	return p;
}

/** Given a file or directory name, return its full path within the Film's directory.
 *  Any required parent directories will be created.
 */
boost::filesystem::path
Film::file (boost::filesystem::path f) const
{
	DCPOMATIC_ASSERT (_directory);

	boost::filesystem::path p;
	p /= _directory.get();
	p /= f;

	boost::filesystem::create_directories (p.parent_path ());

	return p;
}

list<int>
Film::mapped_audio_channels () const
{
	list<int> mapped;

	if (audio_processor ()) {
		/* Processors are mapped 1:1 to DCP outputs so we can work out mappings from there */
		for (int i = 0; i < audio_processor()->out_channels(); ++i) {
			mapped.push_back (i);
		}
	} else {
		BOOST_FOREACH (shared_ptr<Content> i, content ()) {
			if (i->audio) {
				list<int> c = i->audio->mapping().mapped_output_channels ();
				copy (c.begin(), c.end(), back_inserter (mapped));
			}
		}

		mapped.sort ();
		mapped.unique ();
	}

	return mapped;
}

/** @return a ISDCF-compliant name for a DCP of this film */
string
Film::isdcf_name (bool if_created_now) const
{
	string d;

	string raw_name = name ();

	/* Split the raw name up into words */
	vector<string> words;
	split (words, raw_name, is_any_of (" _-"));

	string fixed_name;

	/* Add each word to fixed_name */
	for (vector<string>::const_iterator i = words.begin(); i != words.end(); ++i) {
		string w = *i;

		/* First letter is always capitalised */
		w[0] = toupper (w[0]);

		/* Count caps in w */
		size_t caps = 0;
		for (size_t i = 0; i < w.size(); ++i) {
			if (isupper (w[i])) {
				++caps;
			}
		}

		/* If w is all caps make the rest of it lower case, otherwise
		   leave it alone.
		*/
		if (caps == w.size ()) {
			for (size_t i = 1; i < w.size(); ++i) {
				w[i] = tolower (w[i]);
			}
		}

		for (size_t i = 0; i < w.size(); ++i) {
			fixed_name += w[i];
		}
	}

	if (fixed_name.length() > 14) {
		fixed_name = fixed_name.substr (0, 14);
	}

	d += fixed_name;

	if (dcp_content_type()) {
		d += "_" + dcp_content_type()->isdcf_name();
		d += "-" + raw_convert<string>(isdcf_metadata().content_version);
	}

	ISDCFMetadata const dm = isdcf_metadata ();

	if (dm.temp_version) {
		d += "-Temp";
	}

	if (dm.pre_release) {
		d += "-Pre";
	}

	if (dm.red_band) {
		d += "-RedBand";
	}

	if (!dm.chain.empty ()) {
		d += "-" + dm.chain;
	}

	if (three_d ()) {
		d += "-3D";
	}

	if (dm.two_d_version_of_three_d) {
		d += "-2D";
	}

	if (!dm.mastered_luminance.empty ()) {
		d += "-" + dm.mastered_luminance;
	}

	if (video_frame_rate() != 24) {
		d += "-" + raw_convert<string>(video_frame_rate());
	}

	if (container()) {
		d += "_" + container()->isdcf_name();
	}

	/* XXX: this uses the first bit of content only */

	/* The standard says we don't do this for trailers, for some strange reason */
	if (dcp_content_type() && dcp_content_type()->libdcp_kind() != dcp::TRAILER) {
		Ratio const * content_ratio = 0;
		BOOST_FOREACH (shared_ptr<Content> i, content ()) {
			if (i->video) {
				/* Here's the first piece of video content */
				if (i->video->scale().ratio ()) {
					content_ratio = i->video->scale().ratio ();
				} else {
					content_ratio = Ratio::from_ratio (i->video->size().ratio ());
				}
				break;
			}
		}

		if (content_ratio && content_ratio != container()) {
			d += "-" + content_ratio->isdcf_name();
		}
	}

	if (!dm.audio_language.empty ()) {
		d += "_" + dm.audio_language;
		if (!dm.subtitle_language.empty()) {

			bool burnt_in = true;
			BOOST_FOREACH (shared_ptr<Content> i, content ()) {
				if (!i->subtitle) {
					continue;
				}

				if (i->subtitle->use() && !i->subtitle->burn()) {
					burnt_in = false;
				}
			}

			string language = dm.subtitle_language;
			if (burnt_in && language != "XX") {
				transform (language.begin(), language.end(), language.begin(), ::tolower);
			} else {
				transform (language.begin(), language.end(), language.begin(), ::toupper);
			}

			d += "-" + language;
		} else {
			d += "-XX";
		}
	}

	if (!dm.territory.empty ()) {
		d += "_" + dm.territory;
		if (dm.rating.empty ()) {
			d += "-NR";
		} else {
			d += "-" + dm.rating;
		}
	}

	/* Count mapped audio channels */

	int non_lfe = 0;
	int lfe = 0;

	BOOST_FOREACH (int i, mapped_audio_channels ()) {
		if (i >= audio_channels()) {
			/* This channel is mapped but is not included in the DCP */
			continue;
		}

		if (static_cast<dcp::Channel> (i) == dcp::LFE) {
			++lfe;
		} else {
			++non_lfe;
		}
	}

	if (non_lfe) {
		d += String::compose("_%1%2", non_lfe, lfe);
	}

	/* XXX: HI/VI */

	d += "_" + resolution_to_string (_resolution);

	if (!dm.studio.empty ()) {
		d += "_" + dm.studio;
	}

	if (if_created_now) {
		d += "_" + boost::gregorian::to_iso_string (boost::gregorian::day_clock::local_day ());
	} else {
		d += "_" + boost::gregorian::to_iso_string (_isdcf_date);
	}

	if (!dm.facility.empty ()) {
		d += "_" + dm.facility;
	}

	if (_interop) {
		d += "_IOP";
	} else {
		d += "_SMPTE";
	}

	if (three_d ()) {
		d += "-3D";
	}

	bool vf = false;
	BOOST_FOREACH (shared_ptr<Content> i, content ()) {
		shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (i);
		if (dc && (dc->reference_video() || dc->reference_audio() || dc->reference_subtitle())) {
			vf = true;
		}
	}

	if (vf) {
		d += "_VF";
	} else {
		d += "_OV";
	}

	return d;
}

/** @return name to give the DCP */
string
Film::dcp_name (bool if_created_now) const
{
	string unfiltered;
	if (use_isdcf_name()) {
		unfiltered = isdcf_name (if_created_now);
	} else {
		unfiltered = name ();
	}

	/* Filter out `bad' characters which cause problems with some systems.
	   There's no apparent list of what really is allowed, so this is a guess.
	*/

	string filtered;
	string const allowed = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_";
	for (size_t i = 0; i < unfiltered.size(); ++i) {
		if (allowed.find (unfiltered[i]) != string::npos) {
			filtered += unfiltered[i];
		}
	}

	return filtered;
}

void
Film::set_directory (boost::filesystem::path d)
{
	_directory = d;
	_dirty = true;
}

void
Film::set_name (string n)
{
	_name = n;
	signal_changed (NAME);
}

void
Film::set_use_isdcf_name (bool u)
{
	_use_isdcf_name = u;
	signal_changed (USE_ISDCF_NAME);
}

void
Film::set_dcp_content_type (DCPContentType const * t)
{
	_dcp_content_type = t;
	signal_changed (DCP_CONTENT_TYPE);
}

void
Film::set_container (Ratio const * c)
{
	_container = c;
	signal_changed (CONTAINER);
}

void
Film::set_resolution (Resolution r)
{
	_resolution = r;
	signal_changed (RESOLUTION);
}

void
Film::set_j2k_bandwidth (int b)
{
	_j2k_bandwidth = b;
	signal_changed (J2K_BANDWIDTH);
}

void
Film::set_isdcf_metadata (ISDCFMetadata m)
{
	_isdcf_metadata = m;
	signal_changed (ISDCF_METADATA);
}

void
Film::set_video_frame_rate (int f)
{
	_video_frame_rate = f;
	signal_changed (VIDEO_FRAME_RATE);
}

void
Film::set_audio_channels (int c)
{
	_audio_channels = c;
	signal_changed (AUDIO_CHANNELS);
}

void
Film::set_three_d (bool t)
{
	_three_d = t;
	signal_changed (THREE_D);

	if (_three_d && _isdcf_metadata.two_d_version_of_three_d) {
		_isdcf_metadata.two_d_version_of_three_d = false;
		signal_changed (ISDCF_METADATA);
	}
}

void
Film::set_interop (bool i)
{
	_interop = i;
	signal_changed (INTEROP);
}

void
Film::set_audio_processor (AudioProcessor const * processor)
{
	_audio_processor = processor;
	signal_changed (AUDIO_PROCESSOR);
	signal_changed (AUDIO_CHANNELS);
}

void
Film::set_reel_type (ReelType t)
{
	_reel_type = t;
	signal_changed (REEL_TYPE);
}

/** @param r Desired reel length in bytes */
void
Film::set_reel_length (int64_t r)
{
	_reel_length = r;
	signal_changed (REEL_LENGTH);
}

void
Film::set_upload_after_make_dcp (bool u)
{
	_upload_after_make_dcp = u;
	signal_changed (UPLOAD_AFTER_MAKE_DCP);
}

void
Film::signal_changed (Property p)
{
	_dirty = true;

	switch (p) {
	case Film::CONTENT:
		set_video_frame_rate (_playlist->best_video_frame_rate ());
		break;
	case Film::VIDEO_FRAME_RATE:
	case Film::SEQUENCE:
		_playlist->maybe_sequence ();
		break;
	default:
		break;
	}

	emit (boost::bind (boost::ref (Changed), p));
}

void
Film::set_isdcf_date_today ()
{
	_isdcf_date = boost::gregorian::day_clock::local_day ();
}

boost::filesystem::path
Film::j2c_path (int reel, Frame frame, Eyes eyes, bool tmp) const
{
	boost::filesystem::path p;
	p /= "j2c";
	p /= video_identifier ();

	char buffer[256];
	snprintf(buffer, sizeof(buffer), "%08d_%08" PRId64, reel, frame);
	string s (buffer);

	if (eyes == EYES_LEFT) {
		s += ".L";
	} else if (eyes == EYES_RIGHT) {
		s += ".R";
	}

	s += ".j2c";

	if (tmp) {
		s += ".tmp";
	}

	p /= s;
	return file (p);
}

/** Find all the DCPs in our directory that can be dcp::DCP::read() and return details of their CPLs */
vector<CPLSummary>
Film::cpls () const
{
	if (!directory ()) {
		return vector<CPLSummary> ();
	}

	vector<CPLSummary> out;

	boost::filesystem::path const dir = directory().get();
	for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator(dir); i != boost::filesystem::directory_iterator(); ++i) {
		if (
			boost::filesystem::is_directory (*i) &&
			i->path().leaf() != "j2c" && i->path().leaf() != "video" && i->path().leaf() != "info" && i->path().leaf() != "analysis"
			) {

			try {
				dcp::DCP dcp (*i);
				dcp.read ();
				DCPOMATIC_ASSERT (dcp.cpls().front()->file());
				out.push_back (
					CPLSummary (
						i->path().leaf().string(),
						dcp.cpls().front()->id(),
						dcp.cpls().front()->annotation_text(),
						dcp.cpls().front()->file().get()
						)
					);
			} catch (...) {

			}
		}
	}

	return out;
}

void
Film::set_signed (bool s)
{
	_signed = s;
	signal_changed (SIGNED);
}

void
Film::set_encrypted (bool e)
{
	_encrypted = e;
	signal_changed (ENCRYPTED);
}

void
Film::set_key (dcp::Key key)
{
	_key = key;
	signal_changed (KEY);
}

ContentList
Film::content () const
{
	return _playlist->content ();
}

void
Film::examine_content (shared_ptr<Content> c)
{
	shared_ptr<Job> j (new ExamineContentJob (shared_from_this(), c));
	JobManager::instance()->add (j);
}

void
Film::examine_and_add_content (shared_ptr<Content> c)
{
	if (dynamic_pointer_cast<FFmpegContent> (c) && _directory) {
		run_ffprobe (c->path(0), file ("ffprobe.log"), _log);
	}

	shared_ptr<Job> j (new ExamineContentJob (shared_from_this(), c));

	_job_connections.push_back (
		j->Finished.connect (bind (&Film::maybe_add_content, this, weak_ptr<Job> (j), weak_ptr<Content> (c)))
		);

	JobManager::instance()->add (j);
}

void
Film::maybe_add_content (weak_ptr<Job> j, weak_ptr<Content> c)
{
	shared_ptr<Job> job = j.lock ();
	if (!job || !job->finished_ok ()) {
		return;
	}

	shared_ptr<Content> content = c.lock ();
	if (!content) {
		return;
	}

	add_content (content);

	if (Config::instance()->automatic_audio_analysis() && content->audio) {
		shared_ptr<Playlist> playlist (new Playlist);
		playlist->add (content);
		boost::signals2::connection c;
		JobManager::instance()->analyse_audio (
			shared_from_this (), playlist, c, bind (&Film::audio_analysis_finished, this)
			);
		_audio_analysis_connections.push_back (c);
	}
}

void
Film::add_content (shared_ptr<Content> c)
{
	/* Add {video,subtitle} content after any existing {video,subtitle} content */
	if (c->video) {
		c->set_position (_playlist->video_end ());
	} else if (c->subtitle) {
		c->set_position (_playlist->subtitle_end ());
	}

	if (_template_film) {
		/* Take settings from the first piece of content of c's type in _template */
		BOOST_FOREACH (shared_ptr<Content> i, _template_film->content()) {
			if (typeid(i.get()) == typeid(c.get())) {
				c->use_template (i);
			}
		}
	}

	_playlist->add (c);
}

void
Film::remove_content (shared_ptr<Content> c)
{
	_playlist->remove (c);
}

void
Film::move_content_earlier (shared_ptr<Content> c)
{
	_playlist->move_earlier (c);
}

void
Film::move_content_later (shared_ptr<Content> c)
{
	_playlist->move_later (c);
}

/** @return length of the film from time 0 to the last thing on the playlist */
DCPTime
Film::length () const
{
	return _playlist->length ();
}

int
Film::best_video_frame_rate () const
{
	return _playlist->best_video_frame_rate ();
}

FrameRateChange
Film::active_frame_rate_change (DCPTime t) const
{
	return _playlist->active_frame_rate_change (t, video_frame_rate ());
}

void
Film::playlist_content_changed (weak_ptr<Content> c, int p, bool frequent)
{
	_dirty = true;

	if (p == ContentProperty::VIDEO_FRAME_RATE) {
		set_video_frame_rate (_playlist->best_video_frame_rate ());
	} else if (p == AudioContentProperty::STREAMS) {
		signal_changed (NAME);
	}

	emit (boost::bind (boost::ref (ContentChanged), c, p, frequent));
}

void
Film::playlist_changed ()
{
	signal_changed (CONTENT);
	signal_changed (NAME);
}

void
Film::playlist_order_changed ()
{
	signal_changed (CONTENT_ORDER);
}

int
Film::audio_frame_rate () const
{
	BOOST_FOREACH (shared_ptr<Content> i, content ()) {
		if (i->audio && i->audio->has_rate_above_48k ()) {
			return 96000;
		}
	}

	return 48000;
}

void
Film::set_sequence (bool s)
{
	_sequence = s;
	_playlist->set_sequence (s);
	signal_changed (SEQUENCE);
}

/** @return Size of the largest possible image in whatever resolution we are using */
dcp::Size
Film::full_frame () const
{
	switch (_resolution) {
	case RESOLUTION_2K:
		return dcp::Size (2048, 1080);
	case RESOLUTION_4K:
		return dcp::Size (4096, 2160);
	}

	DCPOMATIC_ASSERT (false);
	return dcp::Size ();
}

/** @return Size of the frame */
dcp::Size
Film::frame_size () const
{
	return fit_ratio_within (container()->ratio(), full_frame ());
}

/** @param from KDM from time expressed as a local time with an offset from UTC
 *  @param to KDM to time expressed as a local time with an offset from UTC
 */
dcp::EncryptedKDM
Film::make_kdm (
	dcp::Certificate recipient,
	vector<dcp::Certificate> trusted_devices,
	boost::filesystem::path cpl_file,
	dcp::LocalTime from,
	dcp::LocalTime until,
	dcp::Formulation formulation
	) const
{
	shared_ptr<const dcp::CPL> cpl (new dcp::CPL (cpl_file));
	shared_ptr<const dcp::CertificateChain> signer = Config::instance()->signer_chain ();
	if (!signer->valid ()) {
		throw InvalidSignerError ();
	}

	return dcp::DecryptedKDM (
		cpl, key(), from, until, cpl->content_title_text(), cpl->content_title_text(), dcp::LocalTime().as_string()
		).encrypt (signer, recipient, trusted_devices, formulation);
}

/** @param from KDM from time expressed as a local time in the time zone of the Screen's Cinema.
 *  @param to KDM to time expressed as a local time in the time zone of the Screen's Cinema.
 */
list<ScreenKDM>
Film::make_kdms (
	list<shared_ptr<Screen> > screens,
	boost::filesystem::path dcp,
	boost::posix_time::ptime from,
	boost::posix_time::ptime until,
	dcp::Formulation formulation
	) const
{
	list<ScreenKDM> kdms;

	BOOST_FOREACH (shared_ptr<Screen> i, screens) {
		if (i->recipient) {
			dcp::EncryptedKDM const kdm = make_kdm (
				i->recipient.get(),
				i->trusted_devices,
				dcp,
				dcp::LocalTime (from, i->cinema->utc_offset_hour(), i->cinema->utc_offset_minute()),
				dcp::LocalTime (until, i->cinema->utc_offset_hour(), i->cinema->utc_offset_minute()),
				formulation
				);

			kdms.push_back (ScreenKDM (i, kdm));
		}
	}

	return kdms;
}

/** @return The approximate disk space required to encode a DCP of this film with the
 *  current settings, in bytes.
 */
uint64_t
Film::required_disk_space () const
{
	return _playlist->required_disk_space (j2k_bandwidth(), audio_channels(), audio_frame_rate());
}

/** This method checks the disk that the Film is on and tries to decide whether or not
 *  there will be enough space to make a DCP for it.  If so, true is returned; if not,
 *  false is returned and required and available are filled in with the amount of disk space
 *  required and available respectively (in Gb).
 *
 *  Note: the decision made by this method isn't, of course, 100% reliable.
 */
bool
Film::should_be_enough_disk_space (double& required, double& available, bool& can_hard_link) const
{
	/* Create a test file and see if we can hard-link it */
	boost::filesystem::path test = internal_video_asset_dir() / "test";
	boost::filesystem::path test2 = internal_video_asset_dir() / "test2";
	can_hard_link = true;
	FILE* f = fopen_boost (test, "w");
	if (f) {
		fclose (f);
		boost::system::error_code ec;
		boost::filesystem::create_hard_link (test, test2, ec);
		if (ec) {
			can_hard_link = false;
		}
		boost::filesystem::remove (test);
		boost::filesystem::remove (test2);
	}

	boost::filesystem::space_info s = boost::filesystem::space (internal_video_asset_dir ());
	required = double (required_disk_space ()) / 1073741824.0f;
	if (!can_hard_link) {
		required *= 2;
	}
	available = double (s.available) / 1073741824.0f;
	return (available - required) > 1;
}

string
Film::subtitle_language () const
{
	set<string> languages;

	ContentList cl = content ();
	BOOST_FOREACH (shared_ptr<Content>& c, cl) {
		if (c->subtitle) {
			languages.insert (c->subtitle->language ());
		}
	}

	string all;
	BOOST_FOREACH (string s, languages) {
		if (!all.empty ()) {
			all += "/" + s;
		} else {
			all += s;
		}
	}

	return all;
}

/** Change the gains of the supplied AudioMapping to make it a default
 *  for this film.  The defaults are guessed based on what processor (if any)
 *  is in use, the number of input channels and any filename supplied.
 */
void
Film::make_audio_mapping_default (AudioMapping& mapping, optional<boost::filesystem::path> filename) const
{
	static string const regex[] = {
		".*[\\._-]L[\\._-].*",
		".*[\\._-]R[\\._-].*",
		".*[\\._-]C[\\._-].*",
		".*[\\._-]Lfe[\\._-].*",
		".*[\\._-]Ls[\\._-].*",
		".*[\\._-]Rs[\\._-].*"
	};

	static int const regexes = sizeof(regex) / sizeof(*regex);

	if (audio_processor ()) {
		audio_processor()->make_audio_mapping_default (mapping);
	} else {
		mapping.make_zero ();
		if (mapping.input_channels() == 1) {
			bool guessed = false;

			/* See if we can guess where this stream should go */
			if (filename) {
				for (int i = 0; i < regexes; ++i) {
					boost::regex e (regex[i], boost::regex::icase);
					if (boost::regex_match (filename->string(), e) && i < mapping.output_channels()) {
						mapping.set (0, i, 1);
						guessed = true;
					}
				}
			}

			if (!guessed) {
				/* If we have no idea, just put it on centre */
				mapping.set (0, static_cast<int> (dcp::CENTRE), 1);
			}
		} else {
			/* 1:1 mapping */
			for (int i = 0; i < min (mapping.input_channels(), mapping.output_channels()); ++i) {
				mapping.set (i, i, 1);
			}
		}
	}
}

/** @return The names of the channels that audio contents' outputs are passed into;
 *  this is either the DCP or a AudioProcessor.
 */
vector<string>
Film::audio_output_names () const
{
	if (audio_processor ()) {
		return audio_processor()->input_names ();
	}

	DCPOMATIC_ASSERT (MAX_DCP_AUDIO_CHANNELS == 16);

	vector<string> n;

	for (int i = 0; i < audio_channels(); ++i) {
		n.push_back (short_audio_channel_name (i));
	}

	return n;
}

void
Film::repeat_content (ContentList c, int n)
{
	_playlist->repeat (c, n);
}

void
Film::remove_content (ContentList c)
{
	_playlist->remove (c);
}

void
Film::audio_analysis_finished ()
{
	/* XXX */
}

list<DCPTimePeriod>
Film::reels () const
{
	list<DCPTimePeriod> p;
	DCPTime const len = length().round_up (video_frame_rate ());

	switch (reel_type ()) {
	case REELTYPE_SINGLE:
		p.push_back (DCPTimePeriod (DCPTime (), len));
		break;
	case REELTYPE_BY_VIDEO_CONTENT:
	{
		optional<DCPTime> last_split;
		shared_ptr<Content> last_video;
		BOOST_FOREACH (shared_ptr<Content> c, content ()) {
			if (c->video) {
				BOOST_FOREACH (DCPTime t, c->reel_split_points()) {
					if (last_split) {
						p.push_back (DCPTimePeriod (last_split.get(), t));
					}
					last_split = t;
				}
				last_video = c;
			}
		}

		DCPTime video_end = last_video ? last_video->end() : DCPTime(0);
		if (last_split) {
			/* Definitely go from the last split to the end of the video content */
			p.push_back (DCPTimePeriod (last_split.get(), video_end));
		}

		if (video_end < len) {
			/* And maybe go after that as well if there is any non-video hanging over the end */
			p.push_back (DCPTimePeriod (video_end, len));
		}
		break;
	}
	case REELTYPE_BY_LENGTH:
	{
		DCPTime current;
		/* Integer-divide reel length by the size of one frame to give the number of frames per reel */
		Frame const reel_in_frames = _reel_length / ((j2k_bandwidth() / video_frame_rate()) / 8);
		while (current < len) {
			DCPTime end = min (len, current + DCPTime::from_frames (reel_in_frames, video_frame_rate ()));
			p.push_back (DCPTimePeriod (current, end));
			current = end;
		}
		break;
	}
	}

	return p;
}

string
Film::content_summary (DCPTimePeriod period) const
{
	return _playlist->content_summary (period);
}

list<string>
Film::fix_conflicting_settings ()
{
	list<string> notes;

	list<boost::filesystem::path> was_referencing;
	BOOST_FOREACH (shared_ptr<Content> i, content()) {
		shared_ptr<DCPContent> d = dynamic_pointer_cast<DCPContent> (i);
		if (d) {
			list<string> reasons;
			bool was = false;
			if (!d->can_reference_video(reasons) && d->reference_video()) {
				d->set_reference_video (false);
				was = true;
			}
			if (!d->can_reference_audio(reasons) && d->reference_audio()) {
				d->set_reference_audio (false);
				was = true;
			}
			if (!d->can_reference_subtitle(reasons) && d->reference_subtitle()) {
				d->set_reference_subtitle (false);
				was = true;
			}
			if (was) {
				was_referencing.push_back (d->path(0).parent_path().filename());
			}
		}
	}

	BOOST_FOREACH (boost::filesystem::path d, was_referencing) {
		notes.push_back (String::compose (_("The DCP %1 was being referred to by this film.  This not now possible because the reel sizes in the film no longer agree with those in the imported DCP.\n\nSetting the 'Reel type' to 'split by video content' will probably help.\n\nAfter doing that you would need to re-tick the appropriate 'refer to existing DCP' checkboxes."), d.string()));
	}

	return notes;
}

void
Film::use_template (string name)
{
	_template_film.reset (new Film (optional<boost::filesystem::path>()));
	_template_film->read_metadata (Config::instance()->template_path (name));
	_use_isdcf_name = _template_film->_use_isdcf_name;
	_dcp_content_type = _template_film->_dcp_content_type;
	_container = _template_film->_container;
	_resolution = _template_film->_resolution;
	_j2k_bandwidth = _template_film->_j2k_bandwidth;
	_video_frame_rate = _template_film->_video_frame_rate;
	_signed = _template_film->_signed;
	_encrypted = _template_film->_encrypted;
	_audio_channels = _template_film->_audio_channels;
	_sequence = _template_film->_sequence;
	_three_d = _template_film->_three_d;
	_interop = _template_film->_interop;
	_audio_processor = _template_film->_audio_processor;
	_reel_type = _template_film->_reel_type;
	_reel_length = _template_film->_reel_length;
	_upload_after_make_dcp = _template_film->_upload_after_make_dcp;
}