/*
- Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ 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.
- 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 <libcxml/cxml.h>
-#include <boost/shared_ptr.hpp>
-#include <boost/lexical_cast.hpp>
+
#include "playlist.h"
-#include "sndfile_content.h"
-#include "sndfile_decoder.h"
#include "video_content.h"
+#include "text_content.h"
#include "ffmpeg_decoder.h"
#include "ffmpeg_content.h"
#include "image_decoder.h"
+#include "audio_content.h"
#include "content_factory.h"
+#include "dcp_content.h"
#include "job.h"
#include "config.h"
#include "util.h"
+#include "digester.h"
+#include "compose.hpp"
+#include <libcxml/cxml.h>
+#include <libxml++/libxml++.h>
+#include <boost/bind/placeholders.hpp>
+#include <iostream>
#include "i18n.h"
+
using std::list;
using std::cout;
using std::vector;
using std::min;
using std::max;
using std::string;
-using std::stringstream;
using std::pair;
using boost::optional;
-using boost::shared_ptr;
-using boost::weak_ptr;
-using boost::dynamic_pointer_cast;
-using boost::lexical_cast;
+using std::shared_ptr;
+using std::weak_ptr;
+using std::dynamic_pointer_cast;
+using namespace dcpomatic;
+#if BOOST_VERSION >= 106100
+using namespace boost::placeholders;
+#endif
+
Playlist::Playlist ()
- : _sequence_video (true)
- , _sequencing_video (false)
{
}
+
Playlist::~Playlist ()
{
+ boost::mutex::scoped_lock lm (_mutex);
_content.clear ();
- reconnect ();
+ disconnect ();
}
+
void
-Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
+Playlist::content_change (weak_ptr<const Film> weak_film, ChangeType type, weak_ptr<Content> content, int property, bool frequent)
{
- if (property == ContentProperty::LENGTH) {
- maybe_sequence_video ();
+ auto film = weak_film.lock ();
+ DCPOMATIC_ASSERT (film);
+
+ if (type == ChangeType::DONE) {
+ if (
+ property == ContentProperty::TRIM_START ||
+ property == ContentProperty::TRIM_END ||
+ property == ContentProperty::LENGTH ||
+ property == VideoContentProperty::FRAME_TYPE
+ ) {
+ /* Don't respond to position changes here, as:
+ - sequencing after earlier/later changes is handled by move_earlier/move_later
+ - any other position changes will be timeline drags which should not result in content
+ being sequenced.
+ */
+ maybe_sequence (film);
+ }
+
+ if (
+ property == ContentProperty::POSITION ||
+ property == ContentProperty::LENGTH ||
+ property == ContentProperty::TRIM_START ||
+ property == ContentProperty::TRIM_END) {
+
+ bool changed = false;
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ ContentList old = _content;
+ sort (_content.begin(), _content.end(), ContentSorter ());
+ changed = _content != old;
+ }
+
+ if (changed) {
+ OrderChange ();
+ }
+
+ /* The length might have changed, and that's good enough for this signal */
+ LengthChange ();
+ }
}
-
- ContentChanged (content, property, frequent);
+
+ ContentChange (type, content, property, frequent);
}
+
void
-Playlist::maybe_sequence_video ()
+Playlist::maybe_sequence (shared_ptr<const Film> film)
{
- if (!_sequence_video || _sequencing_video) {
+ if (!_sequence || _sequencing) {
return;
}
-
- _sequencing_video = true;
-
- ContentList cl = _content;
- DCPTime next = 0;
- for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
- if (!dynamic_pointer_cast<VideoContent> (*i)) {
+
+ _sequencing = true;
+
+ auto cont = content ();
+
+ /* Keep track of the content that we've set the position of so that we don't
+ do it twice.
+ */
+ ContentList placed;
+
+ /* Video */
+
+ DCPTime next_left;
+ DCPTime next_right;
+ for (auto i: cont) {
+ if (!i->video) {
+ continue;
+ }
+
+ if (i->video->frame_type() == VideoFrameType::THREE_D_RIGHT) {
+ i->set_position (film, next_right);
+ next_right = i->end(film);
+ } else {
+ i->set_position (film, next_left);
+ next_left = i->end(film);
+ }
+
+ placed.push_back (i);
+ }
+
+ /* Captions */
+
+ DCPTime next;
+ for (auto i: cont) {
+ if (i->text.empty() || find (placed.begin(), placed.end(), i) != placed.end()) {
continue;
}
-
- (*i)->set_position (next);
- next = (*i)->end() + 1;
+
+ i->set_position (film, next);
+ next = i->end(film);
}
+
/* This won't change order, so it does not need a sort */
-
- _sequencing_video = false;
+
+ _sequencing = false;
}
+
string
Playlist::video_identifier () const
{
string t;
-
- for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
- shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
- if (vc) {
- t += vc->identifier ();
+
+ for (auto i: content()) {
+ bool burn = false;
+ for (auto j: i->text) {
+ if (j->burn()) {
+ burn = true;
+ }
+ }
+ if (i->video || burn) {
+ t += i->identifier ();
}
}
- return md5_digest (t.c_str(), t.length());
+ Digester digester;
+ digester.add (t.c_str(), t.length());
+ return digester.get ();
}
-/** @param node <Playlist> node */
+
+/** @param film Film that this Playlist is for.
+ * @param node <Playlist> node.
+ * @param version Metadata version number.
+ * @param notes Output notes about that happened.
+ */
void
-Playlist::set_from_xml (shared_ptr<const Film> film, shared_ptr<const cxml::Node> node, int version)
+Playlist::set_from_xml (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
{
- list<cxml::NodePtr> c = node->node_children ("Content");
- for (list<cxml::NodePtr>::iterator i = c.begin(); i != c.end(); ++i) {
- _content.push_back (content_factory (film, *i, version));
+ boost::mutex::scoped_lock lm (_mutex);
+
+ for (auto i: node->node_children ("Content")) {
+ auto content = content_factory (i, version, notes);
+
+ /* See if this content should be nudged to start on a video frame */
+ auto const old_pos = content->position();
+ content->set_position(film, old_pos);
+ if (old_pos != content->position()) {
+ string note = _("Your project contains video content that was not aligned to a frame boundary.");
+ note += " ";
+ if (old_pos < content->position()) {
+ note += String::compose(
+ _("The file %1 has been moved %2 milliseconds later."),
+ content->path_summary(), DCPTime(content->position() - old_pos).seconds() * 1000
+ );
+ } else {
+ note += String::compose(
+ _("The file %1 has been moved %2 milliseconds earlier."),
+ content->path_summary(), DCPTime(content->position() - old_pos).seconds() * 1000
+ );
+ }
+ notes.push_back (note);
+ }
+
+ /* ...or have a start trim which is an integer number of frames */
+ auto const old_trim = content->trim_start();
+ content->set_trim_start(old_trim);
+ if (old_trim != content->trim_start()) {
+ string note = _("Your project contains video content whose trim was not aligned to a frame boundary.");
+ note += " ";
+ if (old_trim < content->trim_start()) {
+ note += String::compose(
+ _("The file %1 has been trimmed by %2 milliseconds more."),
+ content->path_summary(), ContentTime(content->trim_start() - old_trim).seconds() * 1000
+ );
+ } else {
+ note += String::compose(
+ _("The file %1 has been trimmed by %2 milliseconds less."),
+ content->path_summary(), ContentTime(old_trim - content->trim_start()).seconds() * 1000
+ );
+ }
+ notes.push_back (note);
+ }
+
+ _content.push_back (content);
}
+ /* This shouldn't be necessary but better safe than sorry (there could be old files) */
sort (_content.begin(), _content.end(), ContentSorter ());
- reconnect ();
+ reconnect (film);
}
-/** @param node <Playlist> node */
+
+/** @param node <Playlist> node.
+ * @param with_content_paths true to include <Path> nodes in <Content> nodes, false to omit them.
+ */
void
-Playlist::as_xml (xmlpp::Node* node)
+Playlist::as_xml (xmlpp::Node* node, bool with_content_paths)
{
- for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
- (*i)->as_xml (node->add_child ("Content"));
+ for (auto i: content()) {
+ i->as_xml (node->add_child ("Content"), with_content_paths);
}
}
+
void
-Playlist::add (shared_ptr<Content> c)
+Playlist::add (shared_ptr<const Film> film, shared_ptr<Content> c)
{
- _content.push_back (c);
- sort (_content.begin(), _content.end(), ContentSorter ());
- reconnect ();
- Changed ();
+ Change (ChangeType::PENDING);
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _content.push_back (c);
+ sort (_content.begin(), _content.end(), ContentSorter ());
+ reconnect (film);
+ }
+
+ Change (ChangeType::DONE);
+
+ LengthChange ();
}
+
void
Playlist::remove (shared_ptr<Content> c)
{
- ContentList::iterator i = _content.begin ();
- while (i != _content.end() && *i != c) {
- ++i;
+ Change (ChangeType::PENDING);
+
+ bool cancelled = false;
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ auto i = _content.begin ();
+ while (i != _content.end() && *i != c) {
+ ++i;
+ }
+
+ if (i != _content.end()) {
+ _content.erase (i);
+ } else {
+ cancelled = true;
+ }
}
-
- if (i != _content.end ()) {
- _content.erase (i);
- Changed ();
+
+ if (cancelled) {
+ Change (ChangeType::CANCELLED);
+ } else {
+ Change (ChangeType::DONE);
}
/* This won't change order, so it does not need a sort */
+
+ LengthChange ();
}
+
void
Playlist::remove (ContentList c)
{
- for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
- ContentList::iterator j = _content.begin ();
- while (j != _content.end() && *j != *i) {
- ++j;
- }
-
- if (j != _content.end ()) {
- _content.erase (j);
- }
- }
+ Change (ChangeType::PENDING);
- /* This won't change order, so it does not need a sort */
-
- Changed ();
-}
+ {
+ boost::mutex::scoped_lock lm (_mutex);
-bool
-Playlist::has_subtitles () const
-{
- for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
- shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (*i);
- if (fc && !fc->subtitle_streams().empty()) {
- return true;
+ for (auto i: c) {
+ auto j = _content.begin ();
+ while (j != _content.end() && *j != i) {
+ ++j;
+ }
+
+ if (j != _content.end ()) {
+ _content.erase (j);
+ }
}
}
- return false;
+ Change (ChangeType::DONE);
+
+ /* This won't change order, so it does not need a sort */
+
+ LengthChange ();
}
+
class FrameRateCandidate
{
public:
int dcp;
};
+
+/** @return the best frame rate from Config::_allowed_dcp_frame_rates for the content in this list */
int
-Playlist::best_dcp_frame_rate () const
+Playlist::best_video_frame_rate () const
{
- list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
+ auto const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
- /* Work out what rates we could manage, including those achieved by using skip / repeat. */
+ /* Work out what rates we could manage, including those achieved by using skip / repeat */
list<FrameRateCandidate> candidates;
/* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
- for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
- candidates.push_back (FrameRateCandidate (*i, *i));
+ for (auto i: allowed_dcp_frame_rates) {
+ candidates.push_back (FrameRateCandidate(i, i));
}
/* Then the skip/repeat ones */
- for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
- candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
- candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
+ for (auto i: allowed_dcp_frame_rates) {
+ candidates.push_back (FrameRateCandidate (float(i) / 2, i));
+ candidates.push_back (FrameRateCandidate (float(i) * 2, i));
}
/* Pick the best one */
float error = std::numeric_limits<float>::max ();
optional<FrameRateCandidate> best;
- list<FrameRateCandidate>::iterator i = candidates.begin();
+ auto i = candidates.begin();
while (i != candidates.end()) {
float this_error = 0;
- for (ContentList::const_iterator j = _content.begin(); j != _content.end(); ++j) {
- shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
- if (!vc) {
+ for (auto j: content()) {
+ if (!j->video || !j->video_frame_rate()) {
continue;
}
+ /* Best error for this content; we could use the content as-is or double its rate */
+ float best_error = min (
+ float (fabs (i->source - j->video_frame_rate().get())),
+ float (fabs (i->source - j->video_frame_rate().get() * 2))
+ );
+
/* Use the largest difference between DCP and source as the "error" */
- this_error = max (this_error, float (fabs (i->source - vc->video_frame_rate ())));
+ this_error = max (this_error, best_error);
}
if (this_error < error) {
if (!best) {
return 24;
}
-
+
return best->dcp;
}
+
+/** @return length of the playlist from time 0 to the last thing on the playlist */
DCPTime
-Playlist::length () const
+Playlist::length (shared_ptr<const Film> film) const
{
- DCPTime len = 0;
- for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
- len = max (len, (*i)->end() + 1);
+ DCPTime len;
+ for (auto i: content()) {
+ len = max (len, i->end(film));
}
return len;
}
+
+/** @return position of the first thing on the playlist, if it's not empty */
+optional<DCPTime>
+Playlist::start () const
+{
+ auto cont = content ();
+ if (cont.empty()) {
+ return {};
+ }
+
+ auto start = DCPTime::max ();
+ for (auto i: cont) {
+ start = min (start, i->position ());
+ }
+
+ return start;
+}
+
+
+/** Must be called with a lock held on _mutex */
void
-Playlist::reconnect ()
+Playlist::disconnect ()
{
- for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
- i->disconnect ();
+ for (auto& i: _content_connections) {
+ i.disconnect ();
}
_content_connections.clear ();
-
- for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
- _content_connections.push_back ((*i)->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
+}
+
+
+/** Must be called with a lock held on _mutex */
+void
+Playlist::reconnect (shared_ptr<const Film> film)
+{
+ disconnect ();
+
+ for (auto i: _content) {
+ _content_connections.push_back (i->Change.connect(boost::bind(&Playlist::content_change, this, film, _1, _2, _3, _4)));
}
}
+
DCPTime
-Playlist::video_end () const
+Playlist::video_end (shared_ptr<const Film> film) const
{
- DCPTime end = 0;
- for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
- if (dynamic_pointer_cast<const VideoContent> (*i)) {
- end = max (end, (*i)->end ());
+ DCPTime end;
+ for (auto i: content()) {
+ if (i->video) {
+ end = max (end, i->end(film));
}
}
return end;
}
+
+DCPTime
+Playlist::text_end (shared_ptr<const Film> film) const
+{
+ DCPTime end;
+ for (auto i: content()) {
+ if (!i->text.empty ()) {
+ end = max (end, i->end(film));
+ }
+ }
+
+ return end;
+}
+
+
FrameRateChange
Playlist::active_frame_rate_change (DCPTime t, int dcp_video_frame_rate) const
{
- for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
- shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
- if (!vc) {
- break;
+ auto cont = content ();
+ for (ContentList::const_reverse_iterator i = cont.rbegin(); i != cont.rend(); ++i) {
+ if (!(*i)->video) {
+ continue;
}
- if (vc->position() >= t && t < vc->end()) {
- return FrameRateChange (vc->video_frame_rate(), dcp_video_frame_rate);
+ if ((*i)->position() <= t) {
+ /* This is the first piece of content (going backwards...) that starts before t,
+ so it's the active one.
+ */
+ if ((*i)->video_frame_rate ()) {
+ /* This content specified a rate, so use it */
+ return FrameRateChange ((*i)->video_frame_rate().get(), dcp_video_frame_rate);
+ } else {
+ /* No specified rate so just use the DCP one */
+ return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
+ }
}
}
return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
}
+
void
-Playlist::set_sequence_video (bool s)
+Playlist::set_sequence (bool s)
{
- _sequence_video = s;
+ _sequence = s;
}
+
bool
ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
{
- return a->position() < b->position();
+ if (a->position() != b->position()) {
+ return a->position() < b->position();
+ }
+
+ /* Put video before audio if they start at the same time */
+ if (a->video && !b->video) {
+ return true;
+ } else if (!a->video && b->video) {
+ return false;
+ }
+
+ /* Last resort */
+ return a->digest() < b->digest();
}
-/** @return content in an undefined order */
+
+/** @return content in ascending order of position */
ContentList
Playlist::content () const
{
+ boost::mutex::scoped_lock lm (_mutex);
return _content;
}
+
void
-Playlist::repeat (ContentList c, int n)
+Playlist::repeat (shared_ptr<const Film> film, ContentList c, int n)
{
- pair<DCPTime, DCPTime> range (TIME_MAX, 0);
- for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
- range.first = min (range.first, (*i)->position ());
- range.second = max (range.second, (*i)->position ());
- range.first = min (range.first, (*i)->end ());
- range.second = max (range.second, (*i)->end ());
- }
-
- DCPTime pos = range.second;
- for (int i = 0; i < n; ++i) {
- for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
- shared_ptr<Content> copy = (*i)->clone ();
- copy->set_position (pos + copy->position() - range.first);
- _content.push_back (copy);
+ pair<DCPTime, DCPTime> range (DCPTime::max(), DCPTime());
+ for (auto i: c) {
+ range.first = min (range.first, i->position ());
+ range.second = max (range.second, i->position ());
+ range.first = min (range.first, i->end(film));
+ range.second = max (range.second, i->end(film));
+ }
+
+ Change (ChangeType::PENDING);
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ DCPTime pos = range.second;
+ for (int i = 0; i < n; ++i) {
+ for (auto j: c) {
+ auto copy = j->clone ();
+ copy->set_position (film, pos + copy->position() - range.first);
+ _content.push_back (copy);
+ }
+ pos += range.second - range.first;
}
- pos += range.second - range.first;
+
+ sort (_content.begin(), _content.end(), ContentSorter ());
+ reconnect (film);
}
- sort (_content.begin(), _content.end(), ContentSorter ());
-
- reconnect ();
- Changed ();
+ Change (ChangeType::DONE);
}
+
void
-Playlist::move_earlier (shared_ptr<Content> c)
+Playlist::move_earlier (shared_ptr<const Film> film, shared_ptr<Content> c)
{
- sort (_content.begin(), _content.end(), ContentSorter ());
-
- ContentList::iterator previous = _content.end ();
- ContentList::iterator i = _content.begin();
- while (i != _content.end() && *i != c) {
+ auto cont = content ();
+ auto previous = cont.end();
+ auto i = cont.begin();
+ while (i != cont.end() && *i != c) {
previous = i;
++i;
}
- assert (i != _content.end ());
- if (previous == _content.end ()) {
+ DCPOMATIC_ASSERT (i != cont.end());
+ if (previous == cont.end()) {
return;
}
-
- DCPTime const p = (*previous)->position ();
- (*previous)->set_position (p + c->length_after_trim ());
- c->set_position (p);
- sort (_content.begin(), _content.end(), ContentSorter ());
-
- Changed ();
+
+ auto previous_c = *previous;
+
+ auto const p = previous_c->position ();
+ previous_c->set_position (film, p + c->length_after_trim(film));
+ c->set_position (film, p);
}
+
void
-Playlist::move_later (shared_ptr<Content> c)
+Playlist::move_later (shared_ptr<const Film> film, shared_ptr<Content> c)
{
- sort (_content.begin(), _content.end(), ContentSorter ());
-
- ContentList::iterator i = _content.begin();
- while (i != _content.end() && *i != c) {
+ auto cont = content ();
+ auto i = cont.begin();
+ while (i != cont.end() && *i != c) {
++i;
}
- assert (i != _content.end ());
+ DCPOMATIC_ASSERT (i != cont.end());
ContentList::iterator next = i;
++next;
- if (next == _content.end ()) {
+ if (next == cont.end()) {
return;
}
- DCPTime const p = (*next)->position ();
- (*next)->set_position (c->position ());
- c->set_position (p + c->length_after_trim ());
- sort (_content.begin(), _content.end(), ContentSorter ());
-
- Changed ();
+ auto next_c = *next;
+
+ next_c->set_position (film, c->position());
+ c->set_position (film, c->position() + next_c->length_after_trim(film));
+}
+
+
+int64_t
+Playlist::required_disk_space (shared_ptr<const Film> film, int j2k_bandwidth, int audio_channels, int audio_frame_rate) const
+{
+ int64_t video = uint64_t (j2k_bandwidth / 8) * length(film).seconds();
+ int64_t audio = uint64_t (audio_channels * audio_frame_rate * 3) * length(film).seconds();
+
+ for (auto i: content()) {
+ auto d = dynamic_pointer_cast<DCPContent> (i);
+ if (d) {
+ if (d->reference_video()) {
+ video -= uint64_t (j2k_bandwidth / 8) * d->length_after_trim(film).seconds();
+ }
+ if (d->reference_audio()) {
+ audio -= uint64_t (audio_channels * audio_frame_rate * 3) * d->length_after_trim(film).seconds();
+ }
+ }
+ }
+
+ /* Add on 64k for bits and pieces (metadata, subs etc) */
+ return video + audio + 65536;
+}
+
+
+string
+Playlist::content_summary (shared_ptr<const Film> film, DCPTimePeriod period) const
+{
+ string best_summary;
+ int best_score = -1;
+ for (auto i: content()) {
+ int score = 0;
+ auto const o = DCPTimePeriod(i->position(), i->end(film)).overlap (period);
+ if (o) {
+ score += 100 * o.get().duration().get() / period.duration().get();
+ }
+
+ if (i->video) {
+ score += 100;
+ }
+
+ if (score > best_score) {
+ best_summary = i->path(0).leaf().string();
+ best_score = score;
+ }
+ }
+
+ return best_summary;
+}
+
+
+pair<double, double>
+Playlist::speed_up_range (int dcp_video_frame_rate) const
+{
+ pair<double, double> range (DBL_MAX, -DBL_MAX);
+
+ for (auto i: content()) {
+ if (!i->video) {
+ continue;
+ }
+ if (i->video_frame_rate()) {
+ FrameRateChange const frc (i->video_frame_rate().get(), dcp_video_frame_rate);
+ range.first = min (range.first, frc.speed_up);
+ range.second = max (range.second, frc.speed_up);
+ } else {
+ FrameRateChange const frc (dcp_video_frame_rate, dcp_video_frame_rate);
+ range.first = min (range.first, frc.speed_up);
+ range.second = max (range.second, frc.speed_up);
+ }
+ }
+
+ return range;
}