How to Reduce PoolByteArray data ?

uriel

Hi, here is the problem i have to simplify my array:

first, i must talk about the context, i got an audiostreamplayer with a stream data. the complete data.size() = 1 102 192 ! from those data, i want to draw some lines... to get a preview of my sound as you can imagine, i cannot use so much data, so i try to simplify by getting 1/1000.

here is the code of a Node2D (parent of the audiostreamPlayer)...with all data !

func _draw():
    var vibe = $AudioStreamPlayer
    var data = vibe.stream.data

    var x = 15

    for i in data: 
            # draw = (from..., to..., color, width)
            draw_line(Vector2(x,400), Vector2(x,i/2), Color(0,0,0,1), 2)
            x +=3

which make the draw function unusable. and this is only from my test soundfiles, i would get some larger ones, so i need to find the way to smooth/reduce.

how can i reduce the amount of data to be draw ?

EDIT: i have tried :

data.compress(0)

try also various compression modes: https://docs.godotengine.org/en/3.1/classes/class_file.html#enum-file-compressionmode but this is reducing only to 770 000, which is not enough in any case

i also found this, but it doesnt help so much: https://godotengine.org/qa/26934/large-arrays-over-65536-containing-poolbytearrays-crash-game

conclusion... i really need to reduce the amount of data sent to be draw :)

uriel

EDIT: i just found the way to limit the number of values, but still, this is not what i am looking for.

i did add: data.resize(1000) before the loop ! so the 2D lines are now 1000, much better than a milion ... not burning my pc anymore :)

but this is not smoothing or reducing :(

i want only to get 1 each 1000 byte to be use in my loop...

EDIT 2: ok, i believe i found the best option (supported by our friends on the discord), here i share with you:

func _draw():
	var vibe = $AudioStreamPlayer
	var data = vibe.stream.data


	var x = 15 # commence a 15px sur l axe X
#	var steps = 1000
	var h = 150 # height

	# i represente la valeur de chaque frame donc la valeur Y 
	# 1000 est le nombre de byte non traite entre 2 bytes traites.
	for i in range(0, data.size(), 10000):
		# draw = (from..., to..., color, width)
		draw_line(Vector2(x,h), Vector2(x,data[i]/2), Color(0,0,0,1), 2)
		# ajoute 2px entre chaque bar
		x +=3