2 Copyright (C) 2013-2016 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "ffmpeg_subtitle_stream.h"
21 #include "raw_convert.h"
22 #include <libxml++/libxml++.h>
23 #include <boost/foreach.hpp>
31 /** Construct a SubtitleStream from a value returned from to_string().
32 * @param t String returned from to_string().
33 * @param v State file version.
35 FFmpegSubtitleStream::FFmpegSubtitleStream (cxml::ConstNodePtr node, int version)
39 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Period")) {
40 /* In version 32 we assumed that from times were unique, so they were
41 used as identifiers. All subtitles were image subtitles.
44 raw_convert<string> (i->string_child ("From")),
46 ContentTime (i->number_child<ContentTime::Type> ("From")),
47 ContentTime (i->number_child<ContentTime::Type> ("To"))
52 /* In version 33 we use a hash of various parts of the subtitle as the id.
53 <Subtitle> was initially used for image subtitles; later we have
54 <ImageSubtitle> and <TextSubtitle>
56 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Subtitle")) {
58 raw_convert<string> (i->string_child ("Id")),
60 ContentTime (i->number_child<ContentTime::Type> ("From")),
61 ContentTime (i->number_child<ContentTime::Type> ("To"))
66 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("ImageSubtitle")) {
68 raw_convert<string> (i->string_child ("Id")),
70 ContentTime (i->number_child<ContentTime::Type> ("From")),
71 ContentTime (i->number_child<ContentTime::Type> ("To"))
76 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("TextSubtitle")) {
78 raw_convert<string> (i->string_child ("Id")),
80 ContentTime (i->number_child<ContentTime::Type> ("From")),
81 ContentTime (i->number_child<ContentTime::Type> ("To"))
89 FFmpegSubtitleStream::as_xml (xmlpp::Node* root) const
91 FFmpegStream::as_xml (root);
93 as_xml (root, _image_subtitles, "ImageSubtitle");
94 as_xml (root, _text_subtitles, "TextSubtitle");
98 FFmpegSubtitleStream::as_xml (xmlpp::Node* root, PeriodMap const & subs, string node_name) const
100 for (PeriodMap::const_iterator i = subs.begin(); i != subs.end(); ++i) {
101 xmlpp::Node* node = root->add_child (node_name);
102 node->add_child("Id")->add_child_text (i->first);
103 node->add_child("From")->add_child_text (raw_convert<string> (i->second.from.get ()));
104 node->add_child("To")->add_child_text (raw_convert<string> (i->second.to.get ()));
109 FFmpegSubtitleStream::add_image_subtitle (string id, ContentTimePeriod period)
111 DCPOMATIC_ASSERT (_image_subtitles.find (id) == _image_subtitles.end ());
112 _image_subtitles[id] = period;
116 FFmpegSubtitleStream::add_text_subtitle (string id, ContentTimePeriod period)
118 DCPOMATIC_ASSERT (_text_subtitles.find (id) == _text_subtitles.end ());
119 _text_subtitles[id] = period;
122 list<ContentTimePeriod>
123 FFmpegSubtitleStream::image_subtitles_during (ContentTimePeriod period, bool starting) const
125 return subtitles_during (period, starting, _image_subtitles);
128 list<ContentTimePeriod>
129 FFmpegSubtitleStream::text_subtitles_during (ContentTimePeriod period, bool starting) const
131 return subtitles_during (period, starting, _text_subtitles);
134 list<ContentTimePeriod>
135 FFmpegSubtitleStream::subtitles_during (ContentTimePeriod period, bool starting, PeriodMap const & subs) const
137 list<ContentTimePeriod> d;
139 /* XXX: inefficient */
140 for (map<string, ContentTimePeriod>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
141 if ((starting && period.contains (i->second.from)) || (!starting && period.overlaps (i->second))) {
142 d.push_back (i->second);
150 FFmpegSubtitleStream::find_subtitle_to (string id) const
152 PeriodMap::const_iterator i = _image_subtitles.find (id);
153 if (i != _image_subtitles.end ()) {
157 i = _text_subtitles.find (id);
158 DCPOMATIC_ASSERT (i != _text_subtitles.end ());
162 /** Add some offset to all the times in the stream */
164 FFmpegSubtitleStream::add_offset (ContentTime offset)
166 for (PeriodMap::iterator i = _image_subtitles.begin(); i != _image_subtitles.end(); ++i) {
167 i->second.from += offset;
168 i->second.to += offset;
171 for (PeriodMap::iterator i = _text_subtitles.begin(); i != _text_subtitles.end(); ++i) {
172 i->second.from += offset;
173 i->second.to += offset;