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Code Issues Releases Wiki Activity

spectogram visulizer in progress

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This commit is contained in:
Cameron Taylor 2021-09-16 12:04:46 -04:00
parent 39404d35c7
commit d00f2268f9
2 changed files with 59 additions and 0 deletions
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4
source/ChartingState.hx
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@ -98,6 +98,10 @@ class ChartingState extends MusicBeatState
trace(audioBuf.sampleRate); trace(audioBuf.sampleRate);
var spec:SpectogramSprite = new SpectogramSprite();
spec.scrollFactor.set();
add(spec);
gridBG = FlxGridOverlay.create(GRID_SIZE, GRID_SIZE, GRID_SIZE * 8, GRID_SIZE * 16); gridBG = FlxGridOverlay.create(GRID_SIZE, GRID_SIZE, GRID_SIZE * 8, GRID_SIZE * 16);
add(gridBG); add(gridBG);

55
source/SpectogramSprite.hx Normal file
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@ -0,0 +1,55 @@
package;
import flixel.FlxSprite;
import flixel.math.FlxMath;
import flixel.math.FlxPoint;
import flixel.util.FlxColor;
import lime.utils.Int16Array;
using flixel.util.FlxSpriteUtil;
class SpectogramSprite extends FlxSprite
{
public function new()
{
super();
makeGraphic(200, 200, FlxColor.BLUE);
}
override function update(elapsed:Float)
{
if (FlxG.sound.music != null)
{
if (FlxG.sound.music.playing)
{
FlxSpriteUtil.drawRect(this, 0, 0, width, height, FlxColor.BLUE);
@:privateAccess
var audioData:Int16Array = FlxG.sound.music._channel.__source.buffer.data; // jank and hacky lol!
var numSamples:Int = Std.int(audioData.length / 2);
var remappedShit:Int = Std.int(FlxMath.remapToRange(FlxG.sound.music.time, 0, FlxG.sound.music.length, 0, numSamples));
var i = remappedShit;
var prevLine:FlxPoint = new FlxPoint();
for (sample in remappedShit...remappedShit + 256)
{
var left = audioData[i] / 32767;
i += 2;
var remappedSample:Float = FlxMath.remapToRange(sample, remappedShit, remappedShit + 256, 0, 1);
FlxSpriteUtil.drawLine(this, prevLine.x, prevLine.y, width * remappedSample, left * height / 2 + height / 2);
prevLine.x = width * remappedSample;
prevLine.y = left * height / 2 + height / 2;
}
}
}
super.update(elapsed);
}
}