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/*
Copyright (C) 2013-2016 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/>.
*/
#include "ffmpeg_subtitle_stream.h"
#include "raw_convert.h"
#include <libxml++/libxml++.h>
#include <boost/foreach.hpp>
#include <iostream>
using std::string;
using std::map;
using std::list;
using std::cout;
using std::make_pair;
/** Construct a SubtitleStream from a value returned from to_string().
* @param t String returned from to_string().
* @param v State file version.
*/
FFmpegSubtitleStream::FFmpegSubtitleStream (cxml::ConstNodePtr node, int version)
: FFmpegStream (node)
{
if (version == 32) {
BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Period")) {
/* In version 32 we assumed that from times were unique, so they were
used as identifiers. All subtitles were image subtitles.
*/
add_image_subtitle (
raw_convert<string> (i->string_child ("From")),
ContentTimePeriod (
ContentTime (i->number_child<ContentTime::Type> ("From")),
ContentTime (i->number_child<ContentTime::Type> ("To"))
)
);
}
} else {
/* In version 33 we use a hash of various parts of the subtitle as the id.
<Subtitle> was initially used for image subtitles; later we have
<ImageSubtitle> and <TextSubtitle>
*/
BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Subtitle")) {
add_image_subtitle (
raw_convert<string> (i->string_child ("Id")),
ContentTimePeriod (
ContentTime (i->number_child<ContentTime::Type> ("From")),
ContentTime (i->number_child<ContentTime::Type> ("To"))
)
);
}
BOOST_FOREACH (cxml::NodePtr i, node->node_children ("ImageSubtitle")) {
add_image_subtitle (
raw_convert<string> (i->string_child ("Id")),
ContentTimePeriod (
ContentTime (i->number_child<ContentTime::Type> ("From")),
ContentTime (i->number_child<ContentTime::Type> ("To"))
)
);
}
BOOST_FOREACH (cxml::NodePtr i, node->node_children ("TextSubtitle")) {
add_text_subtitle (
raw_convert<string> (i->string_child ("Id")),
ContentTimePeriod (
ContentTime (i->number_child<ContentTime::Type> ("From")),
ContentTime (i->number_child<ContentTime::Type> ("To"))
)
);
}
BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Colour")) {
_colours[RGBA(i->node_child("From"))] = RGBA (i->node_child("To"));
}
}
}
void
FFmpegSubtitleStream::as_xml (xmlpp::Node* root) const
{
FFmpegStream::as_xml (root);
as_xml (root, _image_subtitles, "ImageSubtitle");
as_xml (root, _text_subtitles, "TextSubtitle");
for (map<RGBA, RGBA>::const_iterator i = _colours.begin(); i != _colours.end(); ++i) {
xmlpp::Node* node = root->add_child("Colour");
i->first.as_xml (node->add_child("From"));
i->second.as_xml (node->add_child("To"));
}
}
void
FFmpegSubtitleStream::as_xml (xmlpp::Node* root, PeriodMap const & subs, string node_name) const
{
for (PeriodMap::const_iterator i = subs.begin(); i != subs.end(); ++i) {
xmlpp::Node* node = root->add_child (node_name);
node->add_child("Id")->add_child_text (i->first);
node->add_child("From")->add_child_text (raw_convert<string> (i->second.from.get ()));
node->add_child("To")->add_child_text (raw_convert<string> (i->second.to.get ()));
}
}
void
FFmpegSubtitleStream::add_image_subtitle (string id, ContentTimePeriod period)
{
DCPOMATIC_ASSERT (_image_subtitles.find (id) == _image_subtitles.end ());
_image_subtitles[id] = period;
}
void
FFmpegSubtitleStream::add_text_subtitle (string id, ContentTimePeriod period)
{
DCPOMATIC_ASSERT (_text_subtitles.find (id) == _text_subtitles.end ());
_text_subtitles[id] = period;
}
list<ContentTimePeriod>
FFmpegSubtitleStream::image_subtitles_during (ContentTimePeriod period, bool starting) const
{
return subtitles_during (period, starting, _image_subtitles);
}
list<ContentTimePeriod>
FFmpegSubtitleStream::text_subtitles_during (ContentTimePeriod period, bool starting) const
{
return subtitles_during (period, starting, _text_subtitles);
}
struct PeriodSorter
{
bool operator() (ContentTimePeriod const & a, ContentTimePeriod const & b) {
return a.from < b.from;
}
};
list<ContentTimePeriod>
FFmpegSubtitleStream::subtitles_during (ContentTimePeriod period, bool starting, PeriodMap const & subs) const
{
list<ContentTimePeriod> d;
/* XXX: inefficient */
for (map<string, ContentTimePeriod>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
if ((starting && period.contains (i->second.from)) || (!starting && period.overlaps (i->second))) {
d.push_back (i->second);
}
}
d.sort (PeriodSorter ());
return d;
}
ContentTime
FFmpegSubtitleStream::find_subtitle_to (string id) const
{
PeriodMap::const_iterator i = _image_subtitles.find (id);
if (i != _image_subtitles.end ()) {
return i->second.to;
}
i = _text_subtitles.find (id);
DCPOMATIC_ASSERT (i != _text_subtitles.end ());
return i->second.to;
}
/** Add some offset to all the times in the stream */
void
FFmpegSubtitleStream::add_offset (ContentTime offset)
{
for (PeriodMap::iterator i = _image_subtitles.begin(); i != _image_subtitles.end(); ++i) {
i->second.from += offset;
i->second.to += offset;
}
for (PeriodMap::iterator i = _text_subtitles.begin(); i != _text_subtitles.end(); ++i) {
i->second.from += offset;
i->second.to += offset;
}
}
map<RGBA, RGBA>
FFmpegSubtitleStream::colours () const
{
return _colours;
}
void
FFmpegSubtitleStream::set_colour (RGBA from, RGBA to)
{
_colours[from] = to;
}
bool
FFmpegSubtitleStream::has_text () const
{
return !_text_subtitles.empty ();
}
bool
FFmpegSubtitleStream::has_image () const
{
return !_image_subtitles.empty ();
}
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