More automated renaming.

[dcpomatic.git] / src / lib / string_text_file.cc

diff --git a/src/lib/string_text_file.cc b/src/lib/string_text_file.cc
new file mode 100644 (file)
index 0000000..c7eadbb
--- /dev/null
+++ b/src/lib/string_text_file.cc
@@ -0,0 +1,116 @@
+/*
+    Copyright (C) 2014-2018 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 "string_text_file.h"
+#include "cross.h"
+#include "exceptions.h"
+#include "string_text_file_content.h"
+#include <sub/subrip_reader.h>
+#include <sub/ssa_reader.h>
+#include <sub/collect.h>
+#include <unicode/ucsdet.h>
+#include <unicode/ucnv.h>
+#include <iostream>
+
+#include "i18n.h"
+
+using std::vector;
+using std::cout;
+using std::string;
+using boost::shared_ptr;
+using boost::scoped_array;
+using boost::optional;
+using dcp::Data;
+
+StringTextFile::StringTextFile (shared_ptr<const StringTextFileContent> content)
+{
+       Data in (content->path (0));
+
+       UErrorCode status = U_ZERO_ERROR;
+       UCharsetDetector* detector = ucsdet_open (&status);
+       ucsdet_setText (detector, reinterpret_cast<const char *> (in.data().get()), in.size(), &status);
+
+       UCharsetMatch const * match = ucsdet_detect (detector, &status);
+       char const * in_charset = ucsdet_getName (match, &status);
+
+       UConverter* to_utf16 = ucnv_open (in_charset, &status);
+       /* This is a guess; I think we should be able to encode any input in 4 times its input size */
+       scoped_array<uint16_t> utf16 (new uint16_t[in.size() * 2]);
+       int const utf16_len = ucnv_toUChars (
+               to_utf16, reinterpret_cast<UChar*>(utf16.get()), in.size() * 2,
+               reinterpret_cast<const char *> (in.data().get()), in.size(),
+               &status
+               );
+
+       UConverter* to_utf8 = ucnv_open ("UTF-8", &status);
+       /* Another guess */
+       scoped_array<char> utf8 (new char[utf16_len * 2]);
+       ucnv_fromUChars (to_utf8, utf8.get(), utf16_len * 2, reinterpret_cast<UChar*>(utf16.get()), utf16_len, &status);
+
+       /* Fix OS X line endings */
+       size_t utf8_len = strlen (utf8.get ());
+       for (size_t i = 0; i < utf8_len; ++i) {
+               if (utf8[i] == '\r' && ((i == utf8_len - 1) || utf8[i + 1] != '\n')) {
+                       utf8[i] = '\n';
+               }
+       }
+
+       ucsdet_close (detector);
+       ucnv_close (to_utf16);
+       ucnv_close (to_utf8);
+
+       sub::Reader* reader = 0;
+
+       string ext = content->path(0).extension().string();
+       transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
+
+       if (ext == ".srt") {
+               reader = new sub::SubripReader (utf8.get());
+       } else if (ext == ".ssa" || ext == ".ass") {
+               reader = new sub::SSAReader (utf8.get());
+       }
+
+       if (reader) {
+               _subtitles = sub::collect<vector<sub::Subtitle> > (reader->subtitles ());
+       }
+
+       delete reader;
+}
+
+/** @return time of first subtitle, if there is one */
+optional<ContentTime>
+StringTextFile::first () const
+{
+       if (_subtitles.empty()) {
+               return optional<ContentTime>();
+       }
+
+       return ContentTime::from_seconds(_subtitles[0].from.all_as_seconds());
+}
+
+ContentTime
+StringTextFile::length () const
+{
+       if (_subtitles.empty ()) {
+               return ContentTime ();
+       }
+
+       return ContentTime::from_seconds (_subtitles.back().to.all_as_seconds ());
+}