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"
26 #include "text_content.h"
28 #include <dcp/interop_subtitle_asset.h>
29 #include <dcp/load_font_node.h>
32 using std::dynamic_pointer_cast;
34 using std::make_shared;
35 using std::shared_ptr;
38 using boost::optional;
39 using namespace dcpomatic;
42 DCPSubtitleDecoder::DCPSubtitleDecoder (shared_ptr<const Film> film, shared_ptr<const DCPSubtitleContent> content)
45 /* Load the XML or MXF file */
46 _asset = load(content->path(0));
47 _asset->fix_empty_font_ids();
48 _subtitles = _asset->subtitles();
49 _next = _subtitles.begin ();
51 _subtitle_standard = _asset->subtitle_standard();
53 text.push_back (make_shared<TextDecoder>(this, content->only_text()));
56 FontIDAllocator font_id_allocator;
58 for (auto node: _asset->load_font_nodes()) {
59 _font_id_allocator.add_font(0, _asset->id(), node->id);
61 _font_id_allocator.allocate();
66 DCPSubtitleDecoder::seek (ContentTime time, bool accurate)
68 Decoder::seek (time, accurate);
70 _next = _subtitles.begin ();
71 auto i = _subtitles.begin ();
72 while (i != _subtitles.end() && ContentTime::from_seconds ((*_next)->in().as_seconds()) < time) {
81 DCPSubtitleDecoder::pass ()
83 if (_next == _subtitles.end ()) {
87 /* Gather all subtitles with the same time period that are next
88 on the list. We must emit all subtitles for the same time
89 period with the same emit*() call otherwise the
90 TextDecoder will assume there is nothing else at the
91 time of emitting the first.
94 vector<dcp::SubtitleString> s;
95 vector<dcp::SubtitleImage> i;
96 auto const p = content_time_period (*_next);
98 while (_next != _subtitles.end () && content_time_period (*_next) == p) {
99 auto ns = dynamic_pointer_cast<const dcp::SubtitleString>(*_next);
101 dcp::SubtitleString ns_copy = *ns;
102 if (ns_copy.font()) {
103 ns_copy.set_font(_font_id_allocator.font_id(0, _asset->id(), ns_copy.font().get()));
105 ns_copy.set_font(_font_id_allocator.default_font_id());
107 s.push_back(ns_copy);
110 /* XXX: perhaps these image subs should also be collected together like the string ones are;
111 this would need to be done both here and in DCPDecoder.
114 auto ni = dynamic_pointer_cast<const dcp::SubtitleImage>(*_next);
116 emit_subtitle_image (p, *ni, film()->frame_size(), only_text());
122 only_text()->emit_plain(p, s, _subtitle_standard);
131 DCPSubtitleDecoder::content_time_period (shared_ptr<const dcp::Subtitle> s) const
134 ContentTime::from_seconds(s->in().as_seconds()),
135 ContentTime::from_seconds(s->out().as_seconds())
140 /** @return time of first subtitle, if there is one */
141 optional<ContentTime>
142 DCPSubtitleDecoder::first () const
144 if (_subtitles.empty()) {
148 return ContentTime::from_seconds(_subtitles[0]->in().as_seconds());
153 DCPSubtitleDecoder::update_position()
155 if (_next != _subtitles.end()) {
156 only_text()->maybe_set_position(
157 ContentTime::from_seconds((*_next)->in().as_seconds())