Aegisub/automation/factorybrew/line-per-syllable.lua

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--[[
Copyright (c) 2005, Niels Martin Hansen
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the Aegisub Group nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
]]
-- Aegisub Automation factory-brewed script
-- "Line-per-syllable effects"
-- Use karaskel.lua for skeleton code
include("karaskel-adv.lua")
-- Define the name of the script
name = "Line-per-syllable effects"
-- Define a description of the script
description = "Makes line-per-syllable effects, that is, each syllable in the script gets its own line. This allows for more advanced effects, such as syllables moving about separately, or overlapping each other."
-- Define the script variables that can be configured graphically
-- This is the primary point of the script, being able to configure it graphically
configuration = {
-- First a label to descript what special variables can be used
[1] = {
name = "label1";
kind = "label";
label = [[Variable-names are prefixed with $,
expressions are enclosed in % pairs.
Variables:
$START = Start-time of syllable (ms)
$END = End-time of syllable (ms)
$MID = Time midways through the syllable (ms)
$DUR = Duration of syllable (cs)
$X = X-position of syllable (center)
$WIDTH = width of syllable
$HEIGHT = height of syllable
(There is no $Y)
Calculation example:
\t($start,%$start+10,\fscx110\fscy110)
\move($x,40,%$x-$width+10%,40)
Remember you should always have a \pos or \move in your effect.]];
hint = ""
-- No "default", since a label doesn't have a value
},
-- Then a text field to input the string to replace \k's with
-- Make the default a "NOP" string
[2] = {
name = "k_repstr";
kind = "text";
label = "Effect";
hint = "The string to place at the start of every syllable line.";
default = "{\\an5\\pos($X,40)\\t($START,$END,\\fry360)}"
},
-- Allow the user to specify whether to strip tags or not
[3] = {
name = "striptags";
kind = "bool";
label = "Strip all tags";
hint = "Strip all formatting tags apart from the processed karaoke tags?";
default = false
},
[4] = {
name = "workstyle";
kind = "style";
label = "Line style";
hint = "Only apply the effect to lines with this style. Empty means apply to all lines.";
default = ""
}
}
-- Mandatory values
version, kind= 3, 'basic_ass'
function do_syllable(meta, styles, config, line, syl)
-- text is the replacement text for the syllable
-- ktext is the karaoke effect string
local text, ktext
-- Prepare the stripped or unstripped main text
if config.striptags then
text = syl.text_stripped
else
text = syl.text
end
-- Don't bother with empty syllables
if syl.text == "" or syl.n == 0 then
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return { n=0 }
end
-- Add the variable names to the syllable data
syl["dur"] = syl.duration
syl["start"] = syl.start_time
syl["end"] = syl.end_time
syl["mid"] = syl.start_time + syl.duration*5
syl["x"] = syl.center + line.centerleft
-- Prepare the karaoke effect string
ktext = config.k_repstr
-- Function for replacing the variables
local function var_replacer(varname)
varname = string.lower(varname)
if syl[varname] ~= nil then
return syl[varname]
else
aegisub.output_debug(string.format("Unknown variable name: %s", varname))
return "$" .. varname
end
end
-- Replace the variables in the ktext
ktext = string.gsub(ktext, "$(%a+)", var_replacer)
-- Function for evaluating expressions
local function expression_evaluator(expression)
chunk, err = loadstring(string.format("return (%s)", expression))
if (err) ~= nil then
aegisub.output_debug(string.format("Error parsing expression:\n%s", expression, err))
return "%" .. expression .. "%"
else
return chunk()
end
end
-- Find and evaluate expressions
ktext = string.gsub(ktext, "%%([^%%]*)%%", expression_evaluator)
local newline = copy_line(line)
newline.text = ktext .. text
return { n=1, [1]=newline }
end
function do_line(meta, styles, config, line)
if config.workstyle == "" or config.workstyle == line.style then
return karaskel.do_line(meta, styles, config, line)
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else
return { n=1, [1]=line }
end
end