102 lines
2.7 KiB
JavaScript
102 lines
2.7 KiB
JavaScript
/*
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* ASSFORMAT.JS (MODULE)
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*
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* Version: 1.2.0
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* Author: VideoPlayerCode
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* URL: https://github.com/VideoPlayerCode/mpv-tools
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* License: Apache License, Version 2.0
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*/
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/* jshint -W097 */
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/* global mp, module, require */
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'use strict';
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var Utils = require('MicroUtils');
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var Ass = {};
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Ass._startSeq = mp.get_property_osd('osd-ass-cc/0');
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Ass._stopSeq = mp.get_property_osd('osd-ass-cc/1');
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Ass.startSeq = function(output)
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{
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return output === false ? '' : Ass._startSeq;
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};
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Ass.stopSeq = function(output)
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{
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return output === false ? '' : Ass._stopSeq;
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};
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Ass.esc = function(str, escape)
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{
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if (escape === false) // Conveniently disable escaping via the same call.
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return str;
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// Uses the same technique as mangle_ass() in mpv's osd_libass.c:
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// - Treat backslashes as literal by inserting a U+2060 WORD JOINER after
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// them so libass can't interpret the next char as an escape sequence.
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// - Replace `{` with `\{` to avoid opening an ASS override block. There is
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// no need to escape the `}` since it's printed literally when orphaned.
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// - See: https://github.com/libass/libass/issues/194#issuecomment-351902555
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return str.replace(/\\/g, '\\\u2060').replace(/\{/g, '\\{');
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};
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Ass.size = function(fontSize, output)
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{
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return output === false ? '' : '{\\fs'+fontSize+'}';
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};
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Ass.scale = function(scalePercent, output)
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{
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return output === false ? '' : '{\\fscx'+scalePercent+'\\fscy'+scalePercent+'}';
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};
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Ass.convertPercentToHex = function(percent, invertValue)
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{
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// Tip: Use with "invertValue" to convert input range 0.0 (invisible) - 1.0
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// (fully visible) to hex range '00' (fully visible) - 'FF' (invisible), for
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// use with the alpha() function in a logical manner for end-users.
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if (typeof percent !== 'number' || percent < 0 || percent > 1)
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throw 'Invalid percentage value (must be 0.0 - 1.0)';
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return Utils.toHex(
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Math.floor( // Invert range (optionally), and make into a 0-255 value.
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255 * (invertValue ? 1 - percent : percent)
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),
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2 // Fixed-size: 2 bytes (00-FF), as needed for hex in ASS subtitles.
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);
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};
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Ass.alpha = function(transparencyHex, output)
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{
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return output === false ? '' : '{\\alpha&H'+transparencyHex+'&}'; // 00-FF.
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};
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Ass.color = function(rgbHex, output)
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{
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return output === false ? '' : '{\\1c&H'+rgbHex.substring(4, 6)+rgbHex.substring(2, 4)+rgbHex.substring(0, 2)+'&}';
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};
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Ass.white = function(output)
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{
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return Ass.color('FFFFFF', output);
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};
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Ass.gray = function(output)
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{
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return Ass.color('909090', output);
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};
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Ass.yellow = function(output)
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{
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return Ass.color('FFFF90', output);
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};
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Ass.green = function(output)
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{
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return Ass.color('90FF90', output);
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};
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module.exports = Ass;
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