Aegisub/automation/factorybrew/line-per-syllable.lua
2006-01-16 21:02:54 +00:00

158 lines
5.3 KiB
Lua

--[[
Copyright (c) 2005, Niels Martin Hansen
All rights reserved.
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-- 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,$END,\\fry360)}"
},
-- Allow the user to specify whether to strip tags or not
[3] = {
name = "striptags";
kind = "bool";
label = "Strip all tags";
hint = "Strip all formatting tags apart from the processed karaoke tags?";
default = false
},
[4] = {
name = "workstyle";
kind = "style";
label = "Line style";
hint = "Only apply the effect to lines with this style. Empty means apply to all lines.";
default = ""
}
}
-- Mandatory values
version, kind= 3, 'basic_ass'
function do_syllable(meta, styles, config, line, syl)
-- text is the replacement text for the syllable
-- ktext is the karaoke effect string
local text, ktext
-- Prepare the stripped or unstripped main text
if config.striptags then
text = syl.text_stripped
else
text = syl.text
end
-- Don't bother with empty syllables
if syl.text == "" then
return { n=0 }
end
-- Add the variable names to the syllable data
syl["dur"] = syl.duration
syl["start"] = syl.start_time
syl["end"] = syl.end_time
syl["mid"] = syl.start_time + syl.duration*5
syl["x"] = syl.center + line.centerleft
-- Prepare the karaoke effect string
ktext = config.k_repstr
-- Function for replacing the variables
local function var_replacer(varname)
varname = string.lower(varname)
if syl[varname] ~= nil then
return syl[varname]
else
aegisub.output_debug(string.format("Unknown variable name: %s", varname))
return "$" .. 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 adv_do_line(meta, styles, config, line)
else
return { n=1, [1]=line }
end
end