/*
- Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 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
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/lexical_cast.hpp>
-#include <boost/date_time.hpp>
#include <libxml++/libxml++.h>
#include <libcxml/cxml.h>
-#include <libdcp/signer_chain.h>
-#include <libdcp/cpl.h>
-#include <libdcp/signer.h>
-#include <libdcp/util.h>
-#include <libdcp/kdm.h>
+#include <dcp/signer_chain.h>
+#include <dcp/cpl.h>
+#include <dcp/signer.h>
+#include <dcp/util.h>
+#include <dcp/local_time.h>
+#include <dcp/raw_convert.h>
#include "film.h"
#include "job.h"
#include "util.h"
using std::list;
using boost::shared_ptr;
using boost::weak_ptr;
-using boost::lexical_cast;
using boost::dynamic_pointer_cast;
using boost::to_upper_copy;
using boost::ends_with;
using boost::starts_with;
using boost::optional;
-using libdcp::Size;
-using libdcp::Signer;
-
-int const Film::state_version = 5;
+using dcp::Size;
+using dcp::Signer;
+using dcp::raw_convert;
+
+#define LOG_GENERAL(...) log()->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
+#define LOG_GENERAL_NC(...) log()->log (__VA_ARGS__, Log::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
+ *
+ * Bumped to 32 for 2.0 branch; some times are expressed in Times rather
+ * than frames now.
+ */
+int const Film::current_state_version = 32;
/** Construct a Film object in a given directory.
*
* @param dir Film directory.
*/
-Film::Film (boost::filesystem::path dir)
+Film::Film (boost::filesystem::path dir, bool log)
: _playlist (new Playlist)
- , _use_dci_name (true)
+ , _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 ())
- , _dci_metadata (Config::instance()->default_dci_metadata ())
+ , _isdcf_metadata (Config::instance()->default_isdcf_metadata ())
, _video_frame_rate (24)
- , _audio_channels (MAX_AUDIO_CHANNELS)
+ , _audio_channels (6)
, _three_d (false)
, _sequence_video (true)
, _interop (false)
+ , _state_version (current_state_version)
, _dirty (false)
{
- set_dci_date_today ();
+ set_isdcf_date_today ();
_playlist->Changed.connect (bind (&Film::playlist_changed, this));
_playlist->ContentChanged.connect (bind (&Film::playlist_content_changed, this, _1, _2));
}
set_directory (result);
- _log.reset (new FileLog (file ("log")));
+ if (log) {
+ _log.reset (new FileLog (file ("log")));
+ } else {
+ _log.reset (new NullLog);
+ }
_playlist->set_sequence_video (_sequence_video);
}
Film::video_identifier () const
{
assert (container ());
- LocaleGuard lg;
stringstream s;
+ s.imbue (std::locale::classic ());
+
s << container()->id()
<< "_" << resolution_to_string (_resolution)
<< "_" << _playlist->video_identifier()
s << "_3D";
}
+ if (_with_subtitles) {
+ s << "_WS";
+ }
+
return s.str ();
}
}
boost::filesystem::path
-Film::audio_analysis_path (shared_ptr<const AudioContent> c) const
+Film::audio_analysis_dir () const
{
- boost::filesystem::path p = dir ("analysis");
- p /= c->digest();
- return p;
+ return dir ("analysis");
}
/** Add suitable Jobs to the JobManager to create a DCP for this Film */
void
Film::make_dcp ()
{
- set_dci_date_today ();
+ set_isdcf_date_today ();
if (dcp_name().find ("/") != string::npos) {
throw BadSettingError (_("name"), _("cannot contain slashes"));
}
-
- log()->log (String::compose ("DCP-o-matic %1 git %2 using %3", dcpomatic_version, dcpomatic_git_commit, dependency_version_summary()));
+
+ /* It seems to make sense to auto-save metadata here, since the make DCP may last
+ a long time, and crashes/power failures are moderately likely.
+ */
+ write_metadata ();
+
+ LOG_GENERAL ("DCP-o-matic %1 git %2 using %3", dcpomatic_version, dcpomatic_git_commit, dependency_version_summary());
{
char buffer[128];
gethostname (buffer, sizeof (buffer));
- log()->log (String::compose ("Starting to make DCP on %1", buffer));
+ LOG_GENERAL ("Starting to make DCP on %1", buffer);
}
ContentList cl = content ();
for (ContentList::const_iterator i = cl.begin(); i != cl.end(); ++i) {
- log()->log (String::compose ("Content: %1", (*i)->technical_summary()));
+ LOG_GENERAL ("Content: %1", (*i)->technical_summary());
}
- log()->log (String::compose ("DCP video rate %1 fps", video_frame_rate()));
- log()->log (String::compose ("%1 threads", Config::instance()->num_local_encoding_threads()));
- log()->log (String::compose ("J2K bandwidth %1", j2k_bandwidth()));
+ LOG_GENERAL ("DCP video rate %1 fps", video_frame_rate());
+ LOG_GENERAL ("%1 threads", Config::instance()->num_local_encoding_threads());
+ LOG_GENERAL ("J2K bandwidth %1", j2k_bandwidth());
#ifdef DCPOMATIC_DEBUG
- log()->log ("DCP-o-matic built in debug mode.");
+ LOG_GENERAL_NC ("DCP-o-matic built in debug mode.");
#else
- log()->log ("DCP-o-matic built in optimised mode.");
+ LOG_GENERAL_NC ("DCP-o-matic built in optimised mode.");
#endif
#ifdef LIBDCP_DEBUG
- log()->log ("libdcp built in debug mode.");
+ LOG_GENERAL_NC ("libdcp built in debug mode.");
#else
- log()->log ("libdcp built in optimised mode.");
+ LOG_GENERAL_NC ("libdcp built in optimised mode.");
#endif
- log()->log (String::compose ("CPU: %1, %2 processors", cpu_info(), boost::thread::hardware_concurrency ()));
+
+#ifdef DCPOMATIC_WINDOWS
+ OSVERSIONINFO info;
+ info.dwOSVersionInfoSize = sizeof (info);
+ GetVersionEx (&info);
+ LOG_GENERAL ("Windows version %1.%2.%3 SP %4", info.dwMajorVersion, info.dwMinorVersion, info.dwBuildNumber, info.szCSDVersion);
+#endif
+
+ LOG_GENERAL ("CPU: %1, %2 processors", cpu_info(), boost::thread::hardware_concurrency ());
list<pair<string, string> > const m = mount_info ();
for (list<pair<string, string> >::const_iterator i = m.begin(); i != m.end(); ++i) {
- log()->log (String::compose ("Mount: %1 %2", i->first, i->second));
+ LOG_GENERAL ("Mount: %1 %2", i->first, i->second);
}
if (container() == 0) {
return N;
}
-/** Write state to our `metadata' file */
-void
-Film::write_metadata () const
+shared_ptr<xmlpp::Document>
+Film::metadata () const
{
- if (!boost::filesystem::exists (directory ())) {
- boost::filesystem::create_directory (directory ());
- }
-
- LocaleGuard lg;
-
- boost::filesystem::create_directories (directory ());
+ shared_ptr<xmlpp::Document> doc (new xmlpp::Document);
+ xmlpp::Element* root = doc->create_root_node ("Metadata");
- xmlpp::Document doc;
- xmlpp::Element* root = doc.create_root_node ("Metadata");
-
- root->add_child("Version")->add_child_text (lexical_cast<string> (state_version));
+ root->add_child("Version")->add_child_text (raw_convert<string> (current_state_version));
root->add_child("Name")->add_child_text (_name);
- root->add_child("UseDCIName")->add_child_text (_use_dci_name ? "1" : "0");
+ 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->dci_name ());
+ root->add_child("DCPContentType")->add_child_text (_dcp_content_type->isdcf_name ());
}
if (_container) {
root->add_child("Resolution")->add_child_text (resolution_to_string (_resolution));
root->add_child("Scaler")->add_child_text (_scaler->id ());
root->add_child("WithSubtitles")->add_child_text (_with_subtitles ? "1" : "0");
- root->add_child("J2KBandwidth")->add_child_text (lexical_cast<string> (_j2k_bandwidth));
- _dci_metadata.as_xml (root->add_child ("DCIMetadata"));
- root->add_child("VideoFrameRate")->add_child_text (lexical_cast<string> (_video_frame_rate));
- root->add_child("DCIDate")->add_child_text (boost::gregorian::to_iso_string (_dci_date));
- root->add_child("AudioChannels")->add_child_text (lexical_cast<string> (_audio_channels));
+ 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("SequenceVideo")->add_child_text (_sequence_video ? "1" : "0");
root->add_child("Interop")->add_child_text (_interop ? "1" : "0");
root->add_child("Key")->add_child_text (_key.hex ());
_playlist->as_xml (root->add_child ("Playlist"));
- doc.write_to_file_formatted (file("metadata.xml").string ());
-
- _dirty = false;
+ return doc;
}
-/** Read state from our metadata file */
+/** Write state to our `metadata' file */
void
-Film::read_metadata ()
+Film::write_metadata () const
{
- LocaleGuard lg;
+ boost::filesystem::create_directories (directory ());
+ shared_ptr<xmlpp::Document> doc = metadata ();
+ doc->write_to_file_formatted (file("metadata.xml").string ());
+ _dirty = false;
+}
+/** Read state from our metadata file.
+ * @return Notes about things that the user should know about, or empty.
+ */
+list<string>
+Film::read_metadata ()
+{
if (boost::filesystem::exists (file ("metadata")) && !boost::filesystem::exists (file ("metadata.xml"))) {
throw StringError (_("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!"));
}
cxml::Document f ("Metadata");
f.read_file (file ("metadata.xml"));
- int const version = f.number_child<int> ("Version");
+ _state_version = f.number_child<int> ("Version");
+ if (_state_version > current_state_version) {
+ throw StringError (_("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");
- _use_dci_name = f.bool_child ("UseDCIName");
+ 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_dci_name (c.get ());
+ _dcp_content_type = DCPContentType::from_isdcf_name (c.get ());
}
}
_scaler = Scaler::from_id (f.string_child ("Scaler"));
_with_subtitles = f.bool_child ("WithSubtitles");
_j2k_bandwidth = f.number_child<int> ("J2KBandwidth");
- _dci_metadata = DCIMetadata (f.node_child ("DCIMetadata"));
_video_frame_rate = f.number_child<int> ("VideoFrameRate");
- _dci_date = boost::gregorian::from_undelimited_string (f.string_child ("DCIDate"));
_signed = f.optional_bool_child("Signed").get_value_or (true);
_encrypted = f.bool_child ("Encrypted");
_audio_channels = f.number_child<int> ("AudioChannels");
_sequence_video = f.bool_child ("SequenceVideo");
_three_d = f.bool_child ("ThreeD");
_interop = f.bool_child ("Interop");
- _key = libdcp::Key (f.string_child ("Key"));
- _playlist->set_from_xml (shared_from_this(), f.node_child ("Playlist"), version);
+ _key = dcp::Key (f.string_child ("Key"));
+
+ 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);
_dirty = false;
+ return notes;
}
/** Given a directory name, return its full path within the Film's directory.
return p;
}
-/** @return a DCI-compliant name for a DCP of this film */
+/** @return a ISDCF-compliant name for a DCP of this film */
string
-Film::dci_name (bool if_created_now) const
+Film::isdcf_name (bool if_created_now) const
{
stringstream d;
- string fixed_name = to_upper_copy (name());
- for (size_t i = 0; i < fixed_name.length(); ++i) {
- if (fixed_name[i] == ' ') {
- fixed_name[i] = '-';
+ string raw_name = name ();
+ string fixed_name;
+ bool cap_next = true;
+ for (size_t i = 0; i < raw_name.length(); ++i) {
+ if (raw_name[i] == ' ') {
+ cap_next = true;
+ } else if (cap_next) {
+ fixed_name += toupper (raw_name[i]);
+ cap_next = false;
+ } else {
+ fixed_name += tolower (raw_name[i]);
}
}
- /* Spec is that the name part should be maximum 14 characters, as I understand it */
if (fixed_name.length() > 14) {
fixed_name = fixed_name.substr (0, 14);
}
d << fixed_name;
if (dcp_content_type()) {
- d << "_" << dcp_content_type()->dci_name();
- d << "-" << dci_metadata().content_version;
+ d << "_" << dcp_content_type()->isdcf_name();
+ d << "-" << 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 << "-" << video_frame_rate();
}
-
+
if (container()) {
- d << "_" << container()->dci_name();
+ d << "_" << container()->isdcf_name();
}
- DCIMetadata const dm = dci_metadata ();
+ /* XXX: this only works for content which has been scaled to a given ratio,
+ and 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) {
+ ContentList cl = content ();
+ Ratio const * content_ratio = 0;
+ for (ContentList::const_iterator i = cl.begin(); i != cl.end(); ++i) {
+ shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*i);
+ if (vc && (content_ratio == 0 || vc->scale().ratio() != content_ratio)) {
+ content_ratio = vc->scale().ratio();
+ }
+ }
+
+ if (content_ratio && content_ratio != container()) {
+ d << "-" << content_ratio->isdcf_name();
+ }
+ }
if (!dm.audio_language.empty ()) {
d << "_" << dm.audio_language;
break;
}
- d << "_" << resolution_to_string (_resolution);
+ /* 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 (_dci_date);
+ 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";
+ }
+
if (!dm.package_type.empty ()) {
d << "_" << dm.package_type;
}
string
Film::dcp_name (bool if_created_now) const
{
- if (use_dci_name()) {
- return dci_name (if_created_now);
+ if (use_isdcf_name()) {
+ return isdcf_name (if_created_now);
}
return name();
}
void
-Film::set_use_dci_name (bool u)
+Film::set_use_isdcf_name (bool u)
{
- _use_dci_name = u;
- signal_changed (USE_DCI_NAME);
+ _use_isdcf_name = u;
+ signal_changed (USE_ISDCF_NAME);
}
void
}
void
-Film::set_dci_metadata (DCIMetadata m)
+Film::set_isdcf_metadata (ISDCFMetadata m)
{
- _dci_metadata = m;
- signal_changed (DCI_METADATA);
+ _isdcf_metadata = m;
+ signal_changed (ISDCF_METADATA);
}
void
}
void
-Film::set_dci_date_today ()
+Film::set_isdcf_date_today ()
{
- _dci_date = boost::gregorian::day_clock::local_day ();
+ _isdcf_date = boost::gregorian::day_clock::local_day ();
}
boost::filesystem::path
return file (p);
}
-/** @return List of subdirectories (not full paths) containing DCPs that can be successfully libdcp::DCP::read() */
-list<boost::filesystem::path>
-Film::dcps () const
+/** Find all the DCPs in our directory that can be libdcp::DCP::read() and return details of their CPLs */
+vector<CPLSummary>
+Film::cpls () const
{
- list<boost::filesystem::path> out;
+ vector<CPLSummary> out;
boost::filesystem::path const dir = directory ();
for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator(dir); i != boost::filesystem::directory_iterator(); ++i) {
) {
try {
- libdcp::DCP dcp (*i);
+ dcp::DCP dcp (*i);
dcp.read ();
- out.push_back (i->path().leaf ());
+ out.push_back (
+ CPLSummary (
+ i->path().leaf().string(),
+ dcp.cpls().front()->id(),
+ dcp.cpls().front()->annotation_text(),
+ dcp.cpls().front()->file()
+ )
+ );
} catch (...) {
}
void
Film::examine_and_add_content (shared_ptr<Content> c)
{
+ if (dynamic_pointer_cast<FFmpegContent> (c)) {
+ run_ffprobe (c->path(0), file ("ffprobe.log"), _log);
+ }
+
shared_ptr<Job> j (new ExamineContentJob (shared_from_this(), c));
j->Finished.connect (bind (&Film::maybe_add_content, this, boost::weak_ptr<Job> (j), boost::weak_ptr<Content> (c)));
JobManager::instance()->add (j);
_playlist->move_later (c);
}
-Time
+DCPTime
Film::length () const
{
return _playlist->length ();
return _playlist->has_subtitles ();
}
-OutputVideoFrame
+int
Film::best_video_frame_rate () const
{
return _playlist->best_dcp_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 (boost::weak_ptr<Content> c, int p)
{
signal_changed (CONTENT);
}
-OutputAudioFrame
-Film::time_to_audio_frames (Time t) const
-{
- return t * audio_frame_rate () / TIME_HZ;
-}
-
-OutputVideoFrame
-Film::time_to_video_frames (Time t) const
-{
- return t * video_frame_rate () / TIME_HZ;
-}
-
-Time
-Film::audio_frames_to_time (OutputAudioFrame f) const
-{
- return f * TIME_HZ / audio_frame_rate ();
-}
-
-Time
-Film::video_frames_to_time (OutputVideoFrame f) const
-{
- return f * TIME_HZ / video_frame_rate ();
-}
-
-OutputAudioFrame
+int
Film::audio_frame_rate () const
{
/* XXX */
signal_changed (SEQUENCE_VIDEO);
}
-libdcp::Size
+/** @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 libdcp::Size (2048, 1080);
+ return dcp::Size (2048, 1080);
case RESOLUTION_4K:
- return libdcp::Size (4096, 2160);
+ return dcp::Size (4096, 2160);
}
assert (false);
- return libdcp::Size ();
+ return dcp::Size ();
}
-libdcp::KDM
+/** @return Size of the frame */
+dcp::Size
+Film::frame_size () const
+{
+ return fit_ratio_within (container()->ratio(), full_frame ());
+}
+
+dcp::EncryptedKDM
Film::make_kdm (
- shared_ptr<libdcp::Certificate> target,
- boost::filesystem::path dcp_dir,
- boost::posix_time::ptime from,
- boost::posix_time::ptime until
+ shared_ptr<dcp::Certificate> target,
+ boost::filesystem::path cpl_file,
+ dcp::LocalTime from,
+ dcp::LocalTime until
) const
{
- shared_ptr<const Signer> signer = make_signer ();
-
- libdcp::DCP dcp (dir (dcp_dir.string ()));
-
- try {
- dcp.read ();
- } catch (...) {
- throw KDMError (_("Could not read DCP to make KDM for"));
- }
-
- time_t now = time (0);
- struct tm* tm = localtime (&now);
- string const issue_date = libdcp::tm_to_string (tm);
-
- dcp.cpls().front()->set_mxf_keys (key ());
-
- return libdcp::KDM (dcp.cpls().front(), signer, target, from, until, "DCP-o-matic", issue_date);
+ shared_ptr<const dcp::CPL> cpl (new dcp::CPL (cpl_file));
+ return dcp::DecryptedKDM (
+ cpl, from, until, "DCP-o-matic", cpl->content_title_text(), dcp::LocalTime().as_string()
+ ).encrypt (make_signer(), target);
}
-list<libdcp::KDM>
+list<dcp::EncryptedKDM>
Film::make_kdms (
list<shared_ptr<Screen> > screens,
boost::filesystem::path dcp,
- boost::posix_time::ptime from,
- boost::posix_time::ptime until
+ dcp::LocalTime from,
+ dcp::LocalTime until
) const
{
- list<libdcp::KDM> kdms;
+ list<dcp::EncryptedKDM> kdms;
for (list<shared_ptr<Screen> >::iterator i = screens.begin(); i != screens.end(); ++i) {
kdms.push_back (make_kdm ((*i)->certificate, dcp, from, until));
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 uint64_t (j2k_bandwidth() / 8) * length().seconds();
+}
+
+/** 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 availabe 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) const
+{
+ boost::filesystem::space_info s = boost::filesystem::space (internal_video_mxf_dir ());
+ required = double (required_disk_space ()) / 1073741824.0f;
+ available = double (s.available) / 1073741824.0f;
+ return (available - required) > 1;
+}