Aegisub/automation/demos/auto3/6-simple-effect.lua
Niels Martin Hansen 6dcb5ff4a8 Runtime errors in auto3 scripts no longer kill the program but are reported properly instead.
Apparently Lua 5.1 has changed the semantics of table.insert so it's incompatible with the way used in all Auto3 demo scripts etc. Now it's overridden in utils.auto3 and all instances of it in sample scripts etc. replaced with code having the expected behaviour.

Originally committed to SVN as r926.
2007-02-06 12:30:17 +00:00

89 lines
3.7 KiB
Lua

-- Aegisub Automation demonstration script
-- Original written by Niels Martin Hansen
-- Given into the public domain
-- Define some required constants
-- version and kind are required to have the given values for the script to work.
-- configuration is not needed in this script, so it's just left as an empty table
version, kind, configuration = 3, "basic_ass", {}
-- Define the displayed name of the script
name = "Simple karaoke effect"
-- A longer description of the script
description = "A simple karaoke effect, with the source code heavily commented. Provided as a starting point for a useful effect."
-- The actual script function
function process_lines(meta, styles, lines, config)
-- Create a local variable to store the output subtitles in
local output = { n=0 }
-- Start to loop over the lines, one by one
-- The lines are numbered 0..n-1
for i = 0, lines.n-1 do
-- Show the user how far the script has got
aegisub.report_progress(i/lines.n*100)
-- First check if the line is even a dialogue line. If it's not, no need to process it.
if lines[i].kind ~= "dialogue" then
output.n = output.n + 1
output[output.n] = lines[i]
else
-- This is a dialogue line, so process is
-- Make a nicer name for the line we're processing
newline = lines[i]
-- Also show the line to the user
aegisub.set_status(newline.text_stripped)
-- The text of the new line will be build little by little
-- Each line has 700 ms fadein, 300 ms fadeout,
-- is positioned at the center of the screen (\an8)
-- and the highlighting should be delayed by 1000 ms (100 cs)
newline.text = string.format("{\\fad(700,300)\\pos(%d,30)\\k100}", meta.res_x/2)
-- Make the line start 1000 ms (100 cs) earlier than original
newline.start_time = newline.start_time - 100
-- Now it's time to loop through the syllables one by one, processing them
-- The first syllable is usually a "null" syllable, not containing real data, so that one should be skipped.
-- This variable is used to keep track of when the last syllable ended
-- It's initialised to 1000, since the start of the line was pushed 1000 ms back
local cursylpos = 1000
for j = 1, lines[i].karaoke.n-1 do
local syl = lines[i].karaoke[j]
-- Call another function to process the syllable
newline.text = newline.text .. doSyllable(syl.text, cursylpos, cursylpos+syl.duration*10, syl.duration, syl.kind)
-- Calculate the start time of the next syllable
cursylpos = cursylpos + syl.duration*10
end
-- The entire line has been calculated
-- Add it to the output
output.n = output.n + 1
output[output.n] = newline
end
end
-- All lines processed, and output filled
-- Just return it
-- (This is important! If you don't return anything, the output file will be empty!)
return output
end
-- This effect was originally written in the "Effector" program, which can be considered the first version of Automation.
-- This following function is almost verbatimly copied from that original script.
-- This is done in order to show how you can make sub-functions to make your script more readable.
-- The contents of this function could also just be pasted into the middle of the main loop in process_lines,
-- but that generally makes scripts harder to read.
function doSyllable(text, t_start, t_end, t_dur, ktype)
-- Declare two local variables needed here
-- (If they're not declared local, they will be global.)
local a, b
-- If it's a "long" syllable, let the effect be different
if t_dur > 75 then
a = t_start + 500
b = t_end
else
a = t_start + 100
b = t_start + 500
end
-- Return the replacement for the syllable, including some ASS tags for format it
return string.format("{\\r\\t(%d,%d,\\1c&H808080&\\2c&H808080&)\\kf%d}%s", a, b, t_dur, text)
end