/*
- Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2016-2019 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
#include "sub_assert.h"
#include "raw_convert.h"
#include "subtitle.h"
+#include "compose.hpp"
#include <boost/algorithm/string.hpp>
#include <boost/bind.hpp>
-#include <boost/foreach.hpp>
-#include <sstream>
#include <iostream>
#include <vector>
using std::string;
-using std::stringstream;
using std::vector;
using std::map;
using std::cout;
-using std::list;
using boost::optional;
using boost::function;
using namespace boost::algorithm;
using namespace sub;
/** @param s Subtitle string encoded in UTF-8 */
-SSAReader::SSAReader (string const & s)
+SSAReader::SSAReader (string s)
{
- stringstream str (s);
- this->read (boost::bind (&get_line_stringstream, &str));
+ this->read (boost::bind(&get_line_string, &s));
}
/** @param f Subtitle file encoded in UTF-8 */
this->read (boost::bind (&get_line_file, f));
}
+Colour
+h_colour (string s)
+{
+ /* There are both BGR and ABGR versions of these colours */
+ if ((s.length() != 8 && s.length() != 10) || s[0] != '&' || s[1] != 'H') {
+ throw SSAError(String::compose("Badly formatted colour tag %1", s));
+ }
+ int ir, ig, ib;
+ /* XXX: ignoring alpha channel here; note that 00 is opaque and FF is transparent */
+ int const off = s.length() == 10 ? 4 : 2;
+ if (sscanf(s.c_str() + off, "%2x%2x%2x", &ib, &ig, &ir) < 3) {
+ throw SSAError(String::compose("Badly formatted colour tag %1", s));
+ }
+ return sub::Colour(ir / 255.0, ig / 255.0, ib / 255.0);
+}
+
class Style
{
public:
Style ()
- : font_size (24)
+ : font_size (72)
, primary_colour (255, 255, 255)
, bold (false)
, italic (false)
+ , underline (false)
+ , horizontal_reference (HORIZONTAL_CENTRE_OF_SCREEN)
+ , vertical_reference (BOTTOM_OF_SCREEN)
+ , vertical_margin (0)
{}
Style (string format_line, string style_line)
- : font_size (24)
+ : font_size (72)
, primary_colour (255, 255, 255)
, bold (false)
, italic (false)
+ , underline (false)
+ , horizontal_reference (HORIZONTAL_CENTRE_OF_SCREEN)
+ , vertical_reference (BOTTOM_OF_SCREEN)
+ , vertical_margin (0)
{
vector<string> keys;
- split (keys, format_line, is_any_of (","));
+ split (keys, format_line, boost::is_any_of (","));
vector<string> style;
- split (style, style_line, is_any_of (","));
+ split (style, style_line, boost::is_any_of (","));
SUB_ASSERT (!keys.empty());
SUB_ASSERT (!style.empty());
} else if (keys[i] == "Fontsize") {
font_size = raw_convert<int> (style[i]);
} else if (keys[i] == "PrimaryColour") {
- primary_colour = colour (raw_convert<int> (style[i]));
+ primary_colour = colour (style[i]);
} else if (keys[i] == "BackColour") {
- back_colour = colour (raw_convert<int> (style[i]));
+ back_colour = colour (style[i]);
} else if (keys[i] == "Bold") {
bold = style[i] == "-1";
} else if (keys[i] == "Italic") {
italic = style[i] == "-1";
+ } else if (keys[i] == "Underline") {
+ underline = style[i] == "-1";
} else if (keys[i] == "BorderStyle") {
if (style[i] == "1") {
effect = SHADOW;
}
+ } else if (keys[i] == "Alignment") {
+ /* These values from libass' source code */
+ switch ((raw_convert<int> (style[i]) - 1) % 3) {
+ case 0:
+ horizontal_reference = LEFT_OF_SCREEN;
+ break;
+ case 1:
+ horizontal_reference = HORIZONTAL_CENTRE_OF_SCREEN;
+ break;
+ case 2:
+ horizontal_reference = RIGHT_OF_SCREEN;
+ break;
+ }
+ switch (raw_convert<int> (style[i]) & 12) {
+ case 4:
+ vertical_reference = TOP_OF_SCREEN;
+ break;
+ case 8:
+ vertical_reference = VERTICAL_CENTRE_OF_SCREEN;
+ break;
+ case 0:
+ vertical_reference = BOTTOM_OF_SCREEN;
+ break;
+ }
+ } else if (keys[i] == "MarginV") {
+ vertical_margin = raw_convert<int> (style[i]);
}
}
}
optional<Colour> back_colour;
bool bold;
bool italic;
+ bool underline;
optional<Effect> effect;
+ HorizontalReference horizontal_reference;
+ VerticalReference vertical_reference;
+ int vertical_margin;
private:
- Colour colour (int c) const
+ Colour colour (string c) const
{
- return Colour (
- ((c & 0x0000ff) >> 0) / 255.0,
- ((c & 0x00ff00) >> 8) / 255.0,
- ((c & 0xff0000) >> 16) / 255.0
- );
+ if (c.length() > 0 && c[0] == '&') {
+ /* &Hbbggrr or &Haabbggrr */
+ return h_colour (c);
+ } else {
+ /* integer */
+ int i = raw_convert<int>(c);
+ return Colour (
+ ((i & 0x0000ff) >> 0) / 255.0,
+ ((i & 0x00ff00) >> 8) / 255.0,
+ ((i & 0xff0000) >> 16) / 255.0
+ );
+ }
}
};
);
}
+void
+SSAReader::parse_style (RawSubtitle& sub, string style, int play_res_x, int play_res_y)
+{
+ if (style == "\\i1") {
+ sub.italic = true;
+ } else if (style == "\\i0" || style == "\\i") {
+ sub.italic = false;
+ } else if (style == "\\b1") {
+ sub.bold = true;
+ } else if (style == "\\b0") {
+ sub.bold = false;
+ } else if (style == "\\u1") {
+ sub.underline = true;
+ } else if (style == "\\u0") {
+ sub.underline = false;
+ } else if (style == "\\an1") {
+ sub.horizontal_position.reference = sub::LEFT_OF_SCREEN;
+ sub.vertical_position.reference = sub::BOTTOM_OF_SCREEN;
+ } else if (style == "\\an2") {
+ sub.horizontal_position.reference = sub::HORIZONTAL_CENTRE_OF_SCREEN;
+ sub.vertical_position.reference = sub::BOTTOM_OF_SCREEN;
+ } else if (style == "\\an3") {
+ sub.horizontal_position.reference = sub::RIGHT_OF_SCREEN;
+ sub.vertical_position.reference = sub::BOTTOM_OF_SCREEN;
+ } else if (style == "\\an4") {
+ sub.horizontal_position.reference = sub::LEFT_OF_SCREEN;
+ sub.vertical_position.reference = sub::VERTICAL_CENTRE_OF_SCREEN;
+ } else if (style == "\\an5") {
+ sub.horizontal_position.reference = sub::HORIZONTAL_CENTRE_OF_SCREEN;
+ sub.vertical_position.reference = sub::VERTICAL_CENTRE_OF_SCREEN;
+ } else if (style == "\\an6") {
+ sub.horizontal_position.reference = sub::RIGHT_OF_SCREEN;
+ sub.vertical_position.reference = sub::VERTICAL_CENTRE_OF_SCREEN;
+ } else if (style == "\\an7") {
+ sub.horizontal_position.reference = sub::LEFT_OF_SCREEN;
+ sub.vertical_position.reference = sub::TOP_OF_SCREEN;
+ } else if (style == "\\an8") {
+ sub.horizontal_position.reference = sub::HORIZONTAL_CENTRE_OF_SCREEN;
+ sub.vertical_position.reference = sub::TOP_OF_SCREEN;
+ } else if (style == "\\an9") {
+ sub.horizontal_position.reference = sub::RIGHT_OF_SCREEN;
+ sub.vertical_position.reference = sub::TOP_OF_SCREEN;
+ } else if (boost::starts_with(style, "\\pos")) {
+ vector<string> bits;
+ boost::algorithm::split (bits, style, boost::is_any_of("(,"));
+ SUB_ASSERT (bits.size() == 3);
+ sub.horizontal_position.reference = sub::LEFT_OF_SCREEN;
+ sub.horizontal_position.proportional = raw_convert<float>(bits[1]) / play_res_x;
+ sub.vertical_position.reference = sub::TOP_OF_SCREEN;
+ sub.vertical_position.proportional = raw_convert<float>(bits[2]) / play_res_y;
+ } else if (boost::starts_with(style, "\\fs")) {
+ SUB_ASSERT (style.length() > 3);
+ sub.font_size.set_points (raw_convert<int>(style.substr(3)));
+ } else if (boost::starts_with(style, "\\c")) {
+ /* \c&Hbbggrr& */
+ if (style.length() <= 2) {
+ throw SSAError(String::compose("Badly formatted colour tag %1", style));
+ }
+ sub.colour = h_colour (style.substr(2, style.length() - 3));
+ }
+}
+
/** @param base RawSubtitle filled in with any required common values.
- * @param line SSA line string.
+ * @param line SSA line string (i.e. just the subtitle, possibly with embedded stuff)
* @return List of RawSubtitles to represent line with vertical reference TOP_OF_SUBTITLE.
*/
-list<RawSubtitle>
-SSAReader::parse_line (RawSubtitle base, string line)
+vector<RawSubtitle>
+SSAReader::parse_line (RawSubtitle base, string line, int play_res_x, int play_res_y)
{
enum {
TEXT,
BACKSLASH
} state = TEXT;
- list<RawSubtitle> subs;
+ vector<RawSubtitle> subs;
RawSubtitle current = base;
string style;
- current.vertical_position.line = 0;
- current.vertical_position.reference = TOP_OF_SUBTITLE;
+ if (!current.vertical_position.reference) {
+ current.vertical_position.reference = BOTTOM_OF_SCREEN;
+ }
+
+ if (!current.vertical_position.proportional) {
+ current.vertical_position.proportional = 0;
+ }
+
+ /* We must have a font size, as there could be a margin specified
+ in pixels and in that case we must know how big the subtitle
+ lines are to work out the position on screen.
+ */
+ if (!current.font_size.points()) {
+ current.font_size.set_points (72);
+ }
+
+ /* Count the number of line breaks */
+ int line_breaks = 0;
+ if (line.length() > 0) {
+ for (size_t i = 0; i < line.length() - 1; ++i) {
+ if (line[i] == '\\' && (line[i+1] == 'n' || line[i+1] == 'N')) {
+ ++line_breaks;
+ }
+ }
+ }
+
+ /* Imagine that the screen is 792 points (i.e. 11 inches) high (as with DCP) */
+ double const line_size = current.font_size.proportional(792) * 1.2;
+
+ /* Tweak vertical_position accordingly */
+ switch (current.vertical_position.reference.get()) {
+ case TOP_OF_SCREEN:
+ case TOP_OF_SUBTITLE:
+ /* Nothing to do */
+ break;
+ case VERTICAL_CENTRE_OF_SCREEN:
+ current.vertical_position.proportional = current.vertical_position.proportional.get() - ((line_breaks + 1) * line_size) / 2;
+ break;
+ case BOTTOM_OF_SCREEN:
+ current.vertical_position.proportional = current.vertical_position.proportional.get() + line_breaks * line_size;
+ break;
+ }
for (size_t i = 0; i < line.length(); ++i) {
char const c = line[i];
state = STYLE;
} else if (c == '\\') {
state = BACKSLASH;
- } else {
+ } else if (c != '\r' && c != '\n') {
current.text += c;
}
break;
case STYLE:
- if (c == '}') {
+ if (c == '}' || c == '\\') {
if (!current.text.empty ()) {
subs.push_back (current);
current.text = "";
}
- if (style == "i1") {
- current.italic = true;
- } else if (style == "i0") {
- current.italic = false;
- }
+ parse_style (current, style, play_res_x, play_res_y);
style = "";
+ }
+
+ if (c == '}') {
state = TEXT;
} else {
style += c;
}
break;
case BACKSLASH:
- if (c == 'n' && !current.text.empty ()) {
- subs.push_back (current);
- current.text = "";
- current.vertical_position.line = current.vertical_position.line.get() + 1;
+ if (c == 'n' || c == 'N') {
+ if (!current.text.empty ()) {
+ subs.push_back (current);
+ current.text = "";
+ }
+ /* Move down one line (1.2 times the font size) */
+ if (current.vertical_position.reference.get() == BOTTOM_OF_SCREEN) {
+ current.vertical_position.proportional = current.vertical_position.proportional.get() - line_size;
+ } else {
+ current.vertical_position.proportional = current.vertical_position.proportional.get() + line_size;
+ }
}
state = TEXT;
break;
EVENTS
} part = INFO;
+ int play_res_x = 288;
+ int play_res_y = 288;
map<string, Style> styles;
string style_format_line;
vector<string> event_format;
}
trim (*line);
+ remove_unicode_bom (line);
if (starts_with (*line, ";") || line->empty ()) {
continue;
/* Section heading */
if (line.get() == "[Script Info]") {
part = INFO;
- } else if (line.get() == "[V4 Styles]") {
+ } else if (line.get() == "[V4 Styles]" || line.get() == "[V4+ Styles]") {
part = STYLES;
} else if (line.get() == "[Events]") {
part = EVENTS;
size_t const colon = line->find (":");
SUB_ASSERT (colon != string::npos);
- SUB_ASSERT (line->length() > colon + 1);
string const type = line->substr (0, colon);
- string const body = line->substr (colon + 2);
+ string body = line->substr (colon + 1);
+ trim (body);
switch (part) {
case INFO:
+ if (type == "PlayResX") {
+ play_res_x = raw_convert<int> (body);
+ } else if (type == "PlayResY") {
+ play_res_y = raw_convert<int> (body);
+ }
break;
case STYLES:
if (type == "Format") {
case EVENTS:
if (type == "Format") {
split (event_format, body, is_any_of (","));
- BOOST_FOREACH (string& i, event_format) {
+ for (auto& i: event_format) {
trim (i);
}
} else if (type == "Dialogue") {
vector<string> event;
split (event, body, is_any_of (","));
+ /* There may be commas in the subtitle part; reassemble any extra parts
+ from when we just split it.
+ */
+ while (event.size() > event_format.size()) {
+ string const ex = event.back ();
+ event.pop_back ();
+ event.back() += "," + ex;
+ }
+
SUB_ASSERT (!event.empty());
SUB_ASSERT (event_format.size() == event.size());
} else if (event_format[i] == "End") {
sub.to = parse_time (event[i]);
} else if (event_format[i] == "Style") {
+ /* libass trims leading '*'s from style names, commenting that
+ "they seem to mean literally nothing". Go figure...
+ */
+ trim_left_if (event[i], boost::is_any_of ("*"));
SUB_ASSERT (styles.find(event[i]) != styles.end());
Style style = styles[event[i]];
sub.font = style.font_name;
sub.effect_colour = style.back_colour;
sub.bold = style.bold;
sub.italic = style.italic;
+ sub.underline = style.underline;
sub.effect = style.effect;
-
- /* XXX: arbitrary */
- sub.vertical_position.lines = 32;
- sub.vertical_position.reference = TOP_OF_SUBTITLE;
- sub.vertical_position.line = 0;
-
+ sub.horizontal_position.reference = style.horizontal_reference;
+ sub.vertical_position.reference = style.vertical_reference;
+ sub.vertical_position.proportional = float(style.vertical_margin) / play_res_y;
+ } else if (event_format[i] == "MarginV") {
+ sub.vertical_position.proportional = raw_convert<float>(event[i]) / play_res_y;
} else if (event_format[i] == "Text") {
- sub.text = event[i];
+ for (auto j: parse_line (sub, event[i], play_res_x, play_res_y)) {
+ _subs.push_back (j);
+ }
}
}
-
- _subs.push_back (sub);
}
}
projects / libsub.git / blobdiff