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/*
Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "stl_binary_reader.h"
#include "exceptions.h"
#include "iso6937.h"
#include "stl_util.h"
#include "compose.hpp"
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/locale.hpp>
using std::map;
using std::vector;
using std::cout;
using std::string;
using std::istream;
using boost::lexical_cast;
using boost::algorithm::replace_all;
using boost::is_any_of;
using boost::locale::conv::utf_to_utf;
using namespace sub;
STLBinaryReader::STLBinaryReader (istream& in)
: _buffer (new unsigned char[1024])
{
in.read ((char *) _buffer, 1024);
if (in.gcount() != 1024) {
throw STLError ("Could not read GSI block from binary STL file");
}
code_page_number = atoi (get_string (0, 3).c_str ());
frame_rate = stl_dfc_to_frame_rate (get_string (3, 8));
display_standard = _tables.display_standard_file_to_enum (get_string (11, 1));
language_group = _tables.language_group_file_to_enum (get_string (12, 2));
language = _tables.language_file_to_enum (get_string (14, 2));
original_programme_title = get_string (16, 32);
original_episode_title = get_string (48, 32);
translated_programme_title = get_string (80, 32);
translated_episode_title = get_string (112, 32);
translator_name = get_string (144, 32);
translator_contact_details = get_string (176, 32);
subtitle_list_reference_code = get_string (208, 16);
creation_date = get_string (224, 6);
revision_date = get_string (230, 6);
revision_number = get_string (236, 2);
tti_blocks = atoi (get_string (238, 5).c_str ());
number_of_subtitles = atoi (get_string (243, 5).c_str ());
subtitle_groups = atoi (get_string (248, 3).c_str ());
maximum_characters = atoi (get_string (251, 2).c_str ());
maximum_rows = atoi (get_string (253, 2).c_str ());
timecode_status = _tables.timecode_status_file_to_enum (get_string (255, 1));
start_of_programme = get_string (256, 8);
first_in_cue = get_string (264, 8);
disks = atoi (get_string (272, 1).c_str ());
disk_sequence_number = atoi (get_string (273, 1).c_str ());
country_of_origin = get_string (274, 3);
publisher = get_string (277, 32);
editor_name = get_string (309, 32);
editor_contact_details = get_string (341, 32);
for (int i = 0; i < tti_blocks; ++i) {
in.read ((char *) _buffer, 128);
if (in.gcount() != 128) {
throw STLError ("Could not read TTI block from binary STL file");
}
if (_tables.comment_file_to_enum (get_int (15, 1)) == COMMENT_YES) {
continue;
}
string const whole = get_string (16, 112);
/* Split the text up into lines (8Ah is a new line) */
vector<string> lines;
split (lines, whole, is_any_of ("\x8a"));
/* Italic / underline specifications can span lines, so we need to track them
outside the lines loop.
*/
bool italic = false;
bool underline = false;
for (size_t i = 0; i < lines.size(); ++i) {
RawSubtitle sub;
sub.from.set_frame (get_timecode (5));
sub.to.set_frame (get_timecode (9));
sub.vertical_position.line = get_int (13, 1) + i;
sub.vertical_position.lines = maximum_rows;
sub.vertical_position.reference = TOP_OF_SCREEN;
sub.italic = italic;
sub.underline = underline;
/* XXX: not sure what to do with JC = 0, "unchanged presentation" */
int const h = get_int (14, 1);
switch (h) {
case 0:
case 2:
sub.horizontal_position = CENTRE;
break;
case 1:
sub.horizontal_position = LEFT;
break;
case 3:
sub.horizontal_position = RIGHT;
break;
}
/* Loop over characters */
string text;
for (size_t j = 0; j < lines[i].size(); ++j) {
unsigned char const c = static_cast<unsigned char> (lines[i][j]);
if (c == 0x8f) {
/* Unused space i.e. end of line */
break;
}
if (c >= 0x80 && c <= 0x83) {
/* Italic or underline control code */
sub.text = utf_to_utf<char> (iso6937_to_utf16 (text.c_str()));
_subs.push_back (sub);
text.clear ();
}
switch (c) {
case 0x80:
italic = true;
break;
case 0x81:
italic = false;
break;
case 0x82:
underline = true;
break;
case 0x83:
underline = false;
break;
default:
text += lines[i][j];
break;
}
sub.italic = italic;
sub.underline = underline;
}
if (!text.empty ()) {
sub.text = utf_to_utf<char> (iso6937_to_utf16 (text.c_str()));
_subs.push_back (sub);
}
/* XXX: justification */
}
}
}
STLBinaryReader::~STLBinaryReader ()
{
delete[] _buffer;
}
string
STLBinaryReader::get_string (int offset, int length) const
{
string s;
for (int i = 0; i < length; ++i) {
s += _buffer[offset + i];
}
return s;
}
int
STLBinaryReader::get_int (int offset, int length) const
{
int v = 0;
for (int i = 0; i < length; ++i) {
v |= _buffer[offset + i] << (8 * i);
}
return v;
}
FrameTime
STLBinaryReader::get_timecode (int offset) const
{
return FrameTime (_buffer[offset], _buffer[offset + 1], _buffer[offset + 2], _buffer[offset + 3]);
}
map<string, string>
STLBinaryReader::metadata () const
{
map<string, string> m;
m["Code page number"] = lexical_cast<string> (code_page_number);
m["Frame rate"] = lexical_cast<string> (frame_rate);
m["Display standard"] = _tables.display_standard_enum_to_description (display_standard);
m["Language group"] = _tables.language_group_enum_to_description (language_group);
m["Language"] = _tables.language_enum_to_description (language);
m["Original programme title"] = original_programme_title;
m["Original episode title"] = original_episode_title;
m["Translated programme title"] = translated_programme_title;
m["Translated episode title"] = translated_episode_title;
m["Translator name"] = translator_name;
m["Translator contact details"] = translator_contact_details;
m["Subtitle list reference code"] = subtitle_list_reference_code;
m["Creation date"] = creation_date;
m["Revision date"] = revision_date;
m["Revision number"] = revision_number;
m["TTI blocks"] = lexical_cast<string> (tti_blocks);
m["Number of subtitles"] = lexical_cast<string> (number_of_subtitles);
m["Subtitle groups"] = lexical_cast<string> (subtitle_groups);
m["Maximum characters"] = lexical_cast<string> (maximum_characters);
m["Maximum rows"] = lexical_cast<string> (maximum_rows);
m["Timecode status"] = _tables.timecode_status_enum_to_description (timecode_status);
m["Start of programme"] = start_of_programme;
m["First in cue"] = first_in_cue;
m["Disks"] = lexical_cast<string> (disks);
m["Disk sequence number"] = lexical_cast<string> (disk_sequence_number);
m["Country of origin"] = country_of_origin;
m["Publisher"] = publisher;
m["Editor name"] = editor_name;
m["Editor contact details"] = editor_contact_details;
return m;
}
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