phoi_Start recording or render new recording as mp3.lua

--- USER CONFIG
local filename = "footswitch_render"

--- END USER CONFIG

  function enc(data)  -- http://lua-users.org/wiki/BaseSixtyFour
    local b='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
      return ((data:gsub('.', function(x)
          local r,b='',x:byte()
          for i=8,1,-1 do r=r..(b%2^i-b%2^(i-1)>0 and '1' or '0') end
          return r;
      end)..'0000'):gsub('%d%d%d?%d?%d?%d?', function(x)
          if (#x < 6) then return '' end
          local c=0
          for i=1,6 do c=c+(x:sub(i,i)=='1' and 2^(6-i) or 0) end
          return b:sub(c+1,c+1)
      end)..({ '', '==', '=' })[#data%3+1])
  end

  function setFormatMP3()
    local form_conf = { [1]=128,
                        [2]=0,
                        [5]=232,
                        [6]=3,
                        [9]=2,
                        [13]=255,
                        [14]=255,
                        [15]=255,
                        [16]=255,
                        [17]=4,
                        [21]=128,
                        len = 28}

     out_str = ''
    for i = 1, form_conf.len do
      if not form_conf[i] then form_conf[i] = 0 end
      out_str = out_str..tostring(form_conf[i]):char()
    end
    reaper.GetSetProjectInfo_String(0, 'RENDER_FORMAT', enc('l3pm'..out_str), true)
  end

  function setRenderBoundsTime()
    reaper.GetSetProjectInfo(0, 'RENDER_BOUNDSFLAG', 2, true)
  end

  function setRenderPattern(name)
    local pr_path = reaper.GetProjectPathEx( 0, '' )
    reaper.GetSetProjectInfo_String(0, 'RENDER_FILE', pr_path, true)
    reaper.GetSetProjectInfo_String(0, 'RENDER_PATTERN', name, true)
  end

  function setRenderSourceMaster()
    reaper.GetSetProjectInfo(0, 'RENDER_SETTINGS', 0, true) -- set to master
  end

function main()
  local playstate = reaper.GetPlayStateEx( 0 )
  if (playstate >> 2) == 1 then -- if currently recording
    reaper.Main_OnCommand(1016, 0) -- stop
    reaper.Main_OnCommand(40290, 0) -- time selection from items
    setRenderSourceMaster()
    setFormatMP3()
    setRenderBoundsTime()
    setRenderPattern(filename)
    reaper.Main_OnCommand(42230, 0) -- render using current settings
  else
    reaper.Main_OnCommand(1013, 0) -- record
  end
end

main()