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/*
Copyright (C) 2014-2020 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 "cross.h"
#include "exceptions.h"
#include "string_text_file.h"
#include "string_text_file_content.h"
#include <dcp/file.h>
#include <sub/collect.h>
#include <sub/ssa_reader.h>
#include <sub/stl_binary_reader.h>
#include <sub/subrip_reader.h>
#include <sub/web_vtt_reader.h>
#include <unicode/ucsdet.h>
#include <unicode/ucnv.h>
#include <iostream>
#include "i18n.h"
using std::cout;
using std::shared_ptr;
using std::string;
using std::vector;
using boost::scoped_array;
using boost::optional;
using dcp::ArrayData;
using namespace dcpomatic;
StringTextFile::StringTextFile (shared_ptr<const StringTextFileContent> content)
{
string ext = content->path(0).extension().string();
transform (ext.begin(), ext.end(), ext.begin(), ::tolower);
std::unique_ptr<sub::Reader> reader;
if (ext == ".stl") {
dcp::File f(content->path(0), "rb");
if (!f) {
throw OpenFileError (f.path(), errno, OpenFileError::READ);
}
try {
reader.reset(new sub::STLBinaryReader(f.get()));
} catch (...) {
throw;
}
} else {
/* Text-based file; sort out its character encoding before we try to parse it */
ArrayData in (content->path (0));
UErrorCode status = U_ZERO_ERROR;
UCharsetDetector* detector = ucsdet_open (&status);
ucsdet_setText (detector, reinterpret_cast<const char *>(in.data()), 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()), 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);
if (ext == ".srt") {
reader.reset(new sub::SubripReader(utf8.get()));
} else if (ext == ".ssa" || ext == ".ass") {
reader.reset(new sub::SSAReader(utf8.get()));
} else if (ext == ".vtt") {
reader.reset(new sub::WebVTTReader(utf8.get()));
}
}
if (reader) {
_subtitles = sub::collect<vector<sub::Subtitle>>(reader->subtitles());
}
}
/** @return time of first subtitle, if there is one */
optional<ContentTime>
StringTextFile::first () const
{
if (_subtitles.empty()) {
return {};
}
return ContentTime::from_seconds(_subtitles[0].from.all_as_seconds());
}
ContentTime
StringTextFile::length () const
{
if (_subtitles.empty ()) {
return {};
}
return ContentTime::from_seconds (_subtitles.back().to.all_as_seconds ());
}
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