Wonder how to apply smoothing, read and write pixels on a image loaded from a different domain name?
Quite simple, load as binary first and than load the ByteArray as Bitmap.
var urlLoader:URLLoader = new URLLoader();
urlLoader.dataFormat = URLLoaderDataFormat.BINARY;
urlLoader.addEventListener(Event.COMPLETE, urlLoaderComplete);
var url:String = "http://www.adobe.com/images/shared/product_mnemonics/50x50/flash_player_50x50.gif";
urlLoader.load(new URLRequest(url));
function urlLoaderComplete(e:Event):void
{
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderComplete);
loader.loadBytes(urlLoader.data as ByteArray);
}
function loaderComplete(e:Event):void
{
var bmp:Bitmap = e.currentTarget.content as Bitmap;
addChild(bmp);
var bitmapData:BitmapData = bmp.bitmapData
bitmapData.applyFilter(bitmapData, bitmapData.rect, new Point(0, 0),
new ColorMatrixFilter([
0, 0, 0, 0, 0,
1, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, -1, -1, 1, 0
]));
}
As I said, it’s really simple, it’s not the best code but it gives you some ideas of how it’s made.
Inside the “tags” folder, I have three pngs for each shape (triangle, square and circle).
You draw the shape you want, I trim it, and compare to each png.
The comparisson is, get the drawn image, stretch it to the size of each png, and apply threshold. The BitmapData.threshold returns you an uint, the number of pixels that has been changed. With this number, divide it to the area of the png, and than, you choose the one that returns you tha smallest number.
and… that’s it. simple simple…
actually, it’s a technique used for some facial/object recognition softwares, but in a simplified way.
Well, I went to the Flash On The Beach for the first time this year. Was really cool and inspiring.
The first night, I had some inspiration, nothing to deal to any of the presentations I saw, but just something that I wanted to test. I couldn’t upload it because I didn’t have internet at the hotel, and at the venue the firewall was blocking me to connect to my FTP.
So, what was my experiment this time?
Gesture!
I think it’s working quite nice for a code I took less than an hour to write. It was much easier than I thought.
Just click and try to draw a Triangle, Circle or Square.
[kml_flashembed fversion="10.0.0" movie="/files/gesture/gesture1.swf" targetclass="flashmovie" publishmethod="static" width="401" height="431"]
Enjoy!
I’ll post the source code later… let me take a nap now.
And the source files zipped with the demos I showed.
http://www.hellokeita.in/presentations/LFPUG/20090827/examples.zip
The contents are:
Example01-SineWaveExample: Simple example generating a sine wave
Example02-KeyboardExample: Example of a piano keyboard
Example03-WaveformExample: Changing the waveform of a sound
Example04-TimePitchExample: Changing pitch and tempo of a mp3
Example05-HeliumBalloon: Real time pitch shifting using Java
Yesterday was my very first time presenting in English at LFPUG.
I was quite nervous but everything went really well.
Thanks Tink to letting me speak there.
Thank you for everyone that went there. The applause in the middle of the presentation cheered me up.
I really enjoyed speaking, and I hope there’s a next time.
I’ll prepare a PDF of the presentation I did together with the source code of the demos I showed and post it here.
Also, Tink should upload the recorded video of the presentation in few days on LFPUG website http://www.lfpug.com
Pitch shifting is the method to change the frequency or the height of a sound.
And why it’s fake? Because, I’m really not using the correct algorithm, actually I just made one for demo purpose. If you listen carefully, you can hear some clippings when you change the slider position.
There is a difference between my previous post about pitch Controlling Pitch and Tempo.
The previous one I was using a dynamically generated sine wave and changing the pitch. It’s much easier because I already have the samples for each sound.
On this example I’m using an MP3 file (Daft Punk, please don’t sue me…If you want, I can change it) and changing the pitch on runtime.
Well it’s working, and as you can see no FPS loss.
The source… well, I’m preparing for my LFPUG presentation so, I’ll try to explain about it there, and than release some kind of source.
There is a post from my friend Li http://www.lidev.com.ar/?p=237 where he is using more accurate algorithm to change the pitch. There’s not much loss on quality and no clips.
I tried to make as similar to a MIDI editing software.
Ok…, it’s really far to be similar… but I’m trying…
There’s somethings that I didn’t like in Flex so maybe I’ll start recreate all just with AS3.
Well, about the functionalities…
Click ‘Add track’ to add a new Track.
You can change the Edit, Remove or change the Volume.
The Mute and Solo functions are not working yet.
Clicking on Edit, will take you to a sequencer interface.
Double clicking on the Sequencer, you can add a new Note.
You can playback it, change the positions and durations.
Clicking on Close from the Sequencer, you get back to the main screen.
Here you can playback all the tracks together.
After all, you can save/load the composition to/from you local hard drive.
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