2 Copyright (C) 2014-2020 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/>.
23 #include "exceptions.h"
24 #include "string_text_file.h"
25 #include "string_text_file_content.h"
27 #include <sub/collect.h>
28 #include <sub/ssa_reader.h>
29 #include <sub/stl_binary_reader.h>
30 #include <sub/subrip_reader.h>
31 #include <sub/web_vtt_reader.h>
32 #include <unicode/ucsdet.h>
33 #include <unicode/ucnv.h>
40 using std::shared_ptr;
43 using boost::scoped_array;
44 using boost::optional;
46 using namespace dcpomatic;
49 StringTextFile::StringTextFile (shared_ptr<const StringTextFileContent> content)
51 string ext = content->path(0).extension().string();
52 transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
54 std::unique_ptr<sub::Reader> reader;
57 dcp::File f(content->path(0), "rb");
59 throw OpenFileError (f.path(), errno, OpenFileError::READ);
62 reader.reset(new sub::STLBinaryReader(f.get()));
68 /* Text-based file; sort out its character encoding before we try to parse it */
70 ArrayData in (content->path (0));
72 UErrorCode status = U_ZERO_ERROR;
73 UCharsetDetector* detector = ucsdet_open (&status);
74 ucsdet_setText (detector, reinterpret_cast<const char *>(in.data()), in.size(), &status);
76 UCharsetMatch const * match = ucsdet_detect (detector, &status);
77 char const * in_charset = ucsdet_getName (match, &status);
79 UConverter* to_utf16 = ucnv_open (in_charset, &status);
80 /* This is a guess; I think we should be able to encode any input in 4 times its input size */
81 scoped_array<uint16_t> utf16 (new uint16_t[in.size() * 2]);
82 int const utf16_len = ucnv_toUChars (
83 to_utf16, reinterpret_cast<UChar*>(utf16.get()), in.size() * 2,
84 reinterpret_cast<const char *>(in.data()), in.size(),
88 UConverter* to_utf8 = ucnv_open ("UTF-8", &status);
90 scoped_array<char> utf8 (new char[utf16_len * 2]);
91 ucnv_fromUChars (to_utf8, utf8.get(), utf16_len * 2, reinterpret_cast<UChar*>(utf16.get()), utf16_len, &status);
93 /* Fix OS X line endings */
94 size_t utf8_len = strlen (utf8.get ());
95 for (size_t i = 0; i < utf8_len; ++i) {
96 if (utf8[i] == '\r' && ((i == utf8_len - 1) || utf8[i + 1] != '\n')) {
101 ucsdet_close (detector);
102 ucnv_close (to_utf16);
103 ucnv_close (to_utf8);
106 reader.reset(new sub::SubripReader(utf8.get()));
107 } else if (ext == ".ssa" || ext == ".ass") {
108 reader.reset(new sub::SSAReader(utf8.get()));
109 } else if (ext == ".vtt") {
110 reader.reset(new sub::WebVTTReader(utf8.get()));
115 _subtitles = sub::collect<vector<sub::Subtitle>>(reader->subtitles());
119 /** @return time of first subtitle, if there is one */
120 optional<ContentTime>
121 StringTextFile::first () const
123 if (_subtitles.empty()) {
127 return ContentTime::from_seconds(_subtitles[0].from.all_as_seconds());
131 StringTextFile::length () const
133 if (_subtitles.empty ()) {
137 return ContentTime::from_seconds (_subtitles.back().to.all_as_seconds ());