2 Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "dcp_subtitle_content.h"
23 #include "dcp_subtitle_decoder.h"
25 #include "text_content.h"
27 #include <dcp/interop_subtitle_asset.h>
28 #include <dcp/load_font_node.h>
31 using std::dynamic_pointer_cast;
33 using std::make_shared;
34 using std::shared_ptr;
37 using boost::optional;
38 using namespace dcpomatic;
41 DCPSubtitleDecoder::DCPSubtitleDecoder (shared_ptr<const Film> film, shared_ptr<const DCPSubtitleContent> content)
44 /* Load the XML or MXF file */
45 auto const asset = load (content->path(0));
46 asset->fix_empty_font_ids ();
47 _subtitles = asset->subtitles ();
48 _next = _subtitles.begin ();
50 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset>(asset)) {
51 _standard = dcp::Standard::INTEROP;
53 _standard = dcp::Standard::SMPTE;
56 text.push_back (make_shared<TextDecoder>(this, content->only_text()));
62 DCPSubtitleDecoder::seek (ContentTime time, bool accurate)
64 Decoder::seek (time, accurate);
66 _next = _subtitles.begin ();
67 auto i = _subtitles.begin ();
68 while (i != _subtitles.end() && ContentTime::from_seconds ((*_next)->in().as_seconds()) < time) {
77 DCPSubtitleDecoder::pass ()
79 if (_next == _subtitles.end ()) {
83 /* Gather all subtitles with the same time period that are next
84 on the list. We must emit all subtitles for the same time
85 period with the same emit*() call otherwise the
86 TextDecoder will assume there is nothing else at the
87 time of emitting the first.
90 vector<dcp::SubtitleString> s;
91 vector<dcp::SubtitleImage> i;
92 auto const p = content_time_period (*_next);
94 while (_next != _subtitles.end () && content_time_period (*_next) == p) {
95 auto ns = dynamic_pointer_cast<const dcp::SubtitleString>(*_next);
100 /* XXX: perhaps these image subs should also be collected together like the string ones are;
101 this would need to be done both here and in DCPDecoder.
104 auto ni = dynamic_pointer_cast<const dcp::SubtitleImage>(*_next);
106 emit_subtitle_image (p, *ni, film()->frame_size(), only_text());
112 only_text()->emit_plain(p, s, _standard);
121 DCPSubtitleDecoder::content_time_period (shared_ptr<const dcp::Subtitle> s) const
124 ContentTime::from_seconds(s->in().as_seconds()),
125 ContentTime::from_seconds(s->out().as_seconds())
130 /** @return time of first subtitle, if there is one */
131 optional<ContentTime>
132 DCPSubtitleDecoder::first () const
134 if (_subtitles.empty()) {
138 return ContentTime::from_seconds(_subtitles[0]->in().as_seconds());
143 DCPSubtitleDecoder::update_position()
145 if (_next != _subtitles.end()) {
146 only_text()->maybe_set_position(
147 ContentTime::from_seconds((*_next)->in().as_seconds())