pitchchanger.lua

-- pitchcontrol.lua
--
-- Version: 0.2.0
-- URL: https://github.com/FichteFoll/mpv-scripts
-- License: ISC

-- Commands for key bindings:
--
-- * script-message-to pitchcontrol increase
--     Increase pitch by one half-tone. Bound to Ctrl+].
-- * script-message-to pitchcontrol decrease
--     Increase pitch by one half-tone. Bound to Ctrl+[.
-- * script-message-to pitchcontrol reset
--     Increase pitch by one half-tone. Bound to Ctrl+ENTER.
-- * script-message-to pitchcontrol toggle
--     Toggle pitching.
-- * script-message-to pitchcontrol set_halftone_pitch <number>
--     Sets pitch to <number> half-tones - positive, negative or 0.


-- Copyright 2016-2017 FichteFoll
--
-- Permission to use, copy, modify, and/or distribute this software for any
-- purpose with or without fee is hereby granted, provided that the above
-- copyright notice and this permission notice appear in all copies.
--
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
-- IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.


utils = require 'mp.utils'
msg = require('mp.msg')
options = require('mp.options')
script_name = mp.get_script_name() -- "pitchcontrol"


RUBBERBAND_LABEL = string.format("rb", script_name)

current_pitch = 0
active = true


function set_halftone_pitch(pitch, activate)
   if activate == nil then
       activate = true
   end
   pitch = tonumber(pitch)
    pitch_scale = pitch /100 +1
   
   if active then
       mp.commandv('af-command', RUBBERBAND_LABEL, 'set-pitch', pitch_scale)
       active = true
   else
       mp.osd_message(("'%s' is inactive"):format(script_name))
       return
   end

   current_pitch = pitch

   -- output new pitch
   mp.osd_message(("Pitch: %+d"):format(pitch))
end


function increase_handler()
   set_halftone_pitch(current_pitch + 1, false)
end


function decrease_handler()
   set_halftone_pitch(current_pitch - 1, false)
end

function reset_handler()
   set_halftone_pitch(0, false)
end

mp.add_key_binding("Ctrl+[", 'increase', decrease_handler)
mp.add_key_binding("Ctrl+]", 'decrease', increase_handler)
mp.add_key_binding("Ctrl+ENTER", 'reset', reset_handler)
mp.register_script_message('set_halftone_pitch', set_halftone_pitch)