[MTA] Waveform

gistfile1.lua

local handl = nil
local sx,_ = guiGetScreenSize()
local colors = { tocolor(255,0,0),tocolor(0,255,0) }
 
function clientRenderFunc()
    if(handl) then
	dxDrawRectangle(sx/2,0,1,256,tocolor(255,255,255,127))
        local bt = getSoundWaveData(handl,512)
	if(not bt) then return end
	for i=1,127 do
	    dxDrawLine(sx/2+64*bt[2*i-1],i*2-2,sx/2+64*bt[2*(i+1)-1],(i+1)*2-2,colors[2])
	    dxDrawLine(sx/2+64*bt[2*i],i*2-1,sx/2+64*bt[2*(i+1)],(i+1)*2-1,colors[1])
	end
    end
end
 
function clientSoundStopFunc(_)
    if(source == handl) then
	removeEventHandler("onClientRender",root,clientRenderFunc)
	removeEventHandler("onClientSoundStopped",root,clientSoundStopFunc)
	handl = nil
    end
end
 
function musicStartFunc()
    if(not handl) then
        handl = playSound('btr.mp3')
        addEventHandler("onClientRender",root,clientRenderFunc)
	addEventHandler("onClientSoundStopped",root,clientSoundStopFunc)
    end
end
 
function musicStopFunc()
    if(handl) then
        removeEventHandler("onClientRender",root,clientRenderFunc)
	removeEventHandler("onClientSoundStopped",root,clientSoundStopFunc)
        stopSound(handl)
        handl = nil
    end
end
 
bindKey("9","down",musicStartFunc)
bindKey("0","down",musicStopFunc)