mirror of https://github.com/odrling/Aegisub
226 lines
9.2 KiB
Lua
226 lines
9.2 KiB
Lua
--[[
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Copyright (c) 2005, Niels Martin Hansen
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of the Aegisub Group nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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]]
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-- Aegisub Automation include file
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-- The purpose of this include file is to provide a default skeleton for Automation scripts,
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-- where you, as a scripter, can just override the functions you need to override.
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-- The following functions can be overridden:
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-- do_syllable - called for each syllable in a line
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-- do_line_decide - called to decide whether to process a line or not
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-- do_line_start - called at the beginning of each line
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-- do_line_end - called at the end of each line
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-- do_line - Process an entire line
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-- By default, these functions are all assigned to the following default functions
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-- Your functions should obviously use the same parameter lists etc.
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-- Note that if you override do_line, none of the other functions will be called!
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-- All the functions mentioned here are, however, wrapped in some code that pre-calculates some
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-- extra data for the lines and syllables.
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-- The following fields are added to lines:
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-- i - The index of the line in the file, 0 being the first
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-- width - Rendered width of the line in pixels (using the line style, overrides are not taken into account)
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-- height - Rendered height of the line in pixels (note that rotation isn't taken into account either)
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-- ascent - Height of the ascenders, in pixels (notice that this looks like the output of text_extents?)
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-- extlead - External leading of the font, in pixels (well, it is!)
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-- centerleft - Pixel position of the left edge of the line, when horisontally centered on screen
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-- centerright - Pixel pisition of the right edge of the line, when horisontally centered on screen
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-- duration - Duration of the line in miliseconds
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-- styleref - The actual style table for the style this line has
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-- The following fields are added to syllables:
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-- i - The index of the syllable in the line, 0 being the first (and usually empty) one
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-- width, height, ascent, extlead - Same as for lines
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-- left - Left pixel position of the syllable, relative to the start of the line
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-- center - Center pixel position of the syllable, also relative to the start of the line
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-- right - Right pixel position of the syllable, relative again
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-- start_time - Start time of the syllable, in miliseconds, relative to the start of the line
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-- end_time - End time of the syllable, similar to start_time
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-- This one is used
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aegisub.output_warning = aegisub.output_debug
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-- Comment out this line to enable debugging messages
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aegisub.output_debug = function() end
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-- Return a replacement text for a syllable
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function default_do_syllable(meta, styles, config, line, syl)
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aegisub.output_debug("default_do_syllable")
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return syl.text
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end
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-- Decide whether or not to process a line
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function default_do_line_decide(meta, styles, config, line)
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aegisub.output_debug("default_do_line_decide")
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return line.kind == "dialogue"
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end
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-- Return a text to prefix the line
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function default_do_line_start(meta, styles, config, line)
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aegisub.output_debug("default_do_line_start")
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return ""
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end
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-- Return a text to suffix the line
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function default_do_line_end(meta, styles, config, line)
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aegisub.output_debug("default_do_line_end")
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return ""
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end
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-- Process an entire line (which has pre-calculated extra data in it already)
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-- Return a table of replacement lines
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function default_do_line(meta, styles, config, line)
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aegisub.output_debug("default_do_line")
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-- Check if the line should be processed at all
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if not do_line_decide(meta, styles, config, line) then
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return {n=0}
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end
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aegisub.output_debug("default_do_line:2")
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-- Create a new local var for the line replacement text, set it to line prefix
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-- This is to make sure the actual line text isn't replaced before the line has been completely processed
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local newtext = do_line_start(meta, styles, config, line)
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aegisub.output_debug("default_do_line:3")
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-- Loop over the syllables
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for i = 0, line.karaoke.n-1 do
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aegisub.output_debug("default_do_line:4:"..i)
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-- Append the replacement for each syllable onto the line
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newtext = newtext .. do_syllable(meta, styles, config, line, line.karaoke[i])
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end
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aegisub.output_debug("default_do_line:5")
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-- Append line suffix
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newtext = newtext .. do_line_end(meta, styles, config, line)
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aegisub.output_debug("default_do_line:6")
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-- Now replace the line text
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line.text = newtext
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-- And return a table with one entry
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return {n=1; [1]=line}
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end
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-- Now assign all the default functions to the names that are actually called
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do_syllable = default_do_syllable
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do_line_decide = default_do_line_decide
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do_line_start = default_do_line_start
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do_line_end = default_do_line_end
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do_line = default_do_line
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precalc_start_progress = 0
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precalc_end_progress = 50
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function precalc_syllable_data(meta, styles, lines)
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aegisub.output_debug("precalc_syllable_data")
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aegisub.set_status("Preparing syllable-data")
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for i = 0, lines.n-1 do
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aegisub.output_debug("precalc_syllable_data:2:"..i)
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aegisub.report_progress(precalc_start_progress + i/lines.n*(precalc_end_progress-precalc_start_progress))
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local line, style = lines[i]
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-- Index number of the line
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line.i = i
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-- Linked list-style access
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line.prev = lines[i-1]
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line.next = lines[i+1]
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aegisub.output_debug("precalc_syllable_data:3:")
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if line.kind == "dialogue" or line.kind == "comment" then
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aegisub.output_debug("precalc_syllable_data:4:")
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local style = styles[line.style]
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if not style then
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-- ok, so the named style does not exist... well there MUST be at least ONE style
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-- pick the first one
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style = styles[0]
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aegisub.output_warning(string.format("WARNING! You have a line using a style named \"%s\", but that style does not exist! Using the first defined style (\"%s\") instead.", line.style, style.name))
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end
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-- Line dimensions
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line.width, line.height, line.ascent, line.extlead = aegisub.text_extents(style, line.text_stripped)
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aegisub.output_debug("precalc_syllable_data:5:")
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-- Line position
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line.centerleft = math.floor((meta.res_x - line.width) / 2)
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line.centerright = meta.res_x - line.centerleft
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-- Line duration, in miliseconds
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line.duration = (line.end_time - line.start_time) * 10
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-- Style reference
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line.styleref = style
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aegisub.output_debug("precalc_syllable_data:6:")
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-- Process the syllables
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local curx, curtime = 0, 0
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for j = 0, line.karaoke.n-1 do
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aegisub.output_debug("precalc_syllable_data:7::"..j)
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local syl = line.karaoke[j]
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-- Syllable index
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syl.i = j
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-- Syllable dimensions
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syl.width, syl.height, syl.ascent, syl.extlead = aegisub.text_extents(style, syl.text_stripped)
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aegisub.output_debug("precalc_syllable_data:8::")
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-- Syllable positioning
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syl.left = curx
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syl.center = math.floor(curx + syl.width/2)
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syl.right = curx + syl.width
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curx = syl.right
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-- Start and end times in miliseconds
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syl.start_time = curtime
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syl.end_time = curtime + syl.duration*10
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curtime = syl.end_time
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end
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end
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end
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end
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-- Everything else is done in the process_lines function
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function skel_process_lines(meta, styles, lines, config)
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aegisub.output_debug("skel_process_lines")
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-- Do a little pre-calculation for each line and syllable
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precalc_syllable_data(meta, styles, lines)
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aegisub.output_debug("skel_process_lines:2")
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-- A var for the new output
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local result = {n=0}
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aegisub.set_status("Running main-processing")
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-- Now do the usual processing
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for i = 0, lines.n-1 do
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aegisub.output_debug("skel_process_lines:3:"..i)
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aegisub.report_progress(50+i/lines.n*50)
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if do_line_decide(meta, styles, config, lines[i]) then
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aegisub.output_debug("skel_process_lines:4:..i")
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-- Get replacement lines
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repl = do_line(meta, styles, config, lines[i])
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-- Append to result table
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for j = 1, repl.n do
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table.insert(result, repl[j])
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end
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end
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end
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-- Done, return the stuff
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return result
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end
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process_lines = skel_process_lines
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