Goal is to show progress of jpeg encoding from bitmap. I have couple of bitmaps that need to be encoded. So I get the total number of bytes as was suggested here:
for (var i:int = 0; i < bitmaps.length; i++)
{
bmp = bitmaps[i];
total_bytes += bmp.getPixels(bmp.rect).length;
}
Then I'm trying to show progress when doing asychronous encoding. I get a ProgressEvent which gives me bytesLoaded. So I calculate the progress like so:
total_loaded_bytes += event.bytesLoaded;
var percentage:int = ((total_loaded_bytes / total_bytes) * 100);
However, total_bytes does not add up to total_loaded_bytes. Total bytes loaded is way highter.
A wrong approach to use bytesLoaded property. This is not to be blandly added up, as this contains the total of already loaded bytes bu the Loader object that issued the event. And a wrong approach on getting total bytes too, you need to use event.bytesTotal from within the progress event listener, since you are loading bytes, not pixels. Even if you are uploading. Also, the exact progress may be totally unavailable for asynchronous encoding, you are only displaying the uploading/downloading progress.
Update: to receive an accumulated progress, do something like this:
var loaders:Array=[]; // array of loaders. Fill manually
var progress:Array=[]; // fill with zeroes alongside loaders, should be same size
function updateProgress(e:ProgressEvent):void {
var loader:Loader=e.target as Loader;
if (!loader) return; // or skip type coercion, we just need the reference
var i:int=loaders.indexOf(loader); // now get an index from array
if (i<0) return; // not found, drop it
progress[i]=e.bytesLoaded; // and update progress array with new value
// now sum up progress array and divide by aggregated bytesTotal
// this one is up to you
}
Related
How would someone change sound levels of a music playing in a loop? For example, I'm making a game and at a certain frame I want the music level (music.wav) to be decreased to half of its volume.
How could someone do this in AS3?
You are using the word "loop" in a confusing way. In programming, a loop usually refers to one of the "for" loops that looks like this:
for (var i:int = 0; i < 10; i++)
{
//do stuff 10 times
}
I surmise that this is not what you mean by loop, but rather that you would like a MovieClip or the main timeline to decrease the volume of a Sound object at the end of n frames. Or do you just mean the music itself is looping? Hopefully you see the value of asking well written questions. That being said..
Mind you, I haven't tried this, but according to my reference book (ActionScript 3.0 Cookbook by Lott, Schall & Peters) you need to use a SoundTransform object which specifies the volume at which you want the sound to be set. Try this:
var _sound:Sound = new Sound(music.wav); // creates a Sound object which has no internal volume control
var channel:SoundChannel = _sound.play(); // creates a SoundChannel which has a soundTransform property
var transform:SoundTransform = new SoundTransform(); // SoundTransform objects have a property called "volume". This is what you need to change volume.
Now in your loop (or on the frame event that you are using) do this:
transform.volume *= 0.9; // or whatever factor you want to have it decrease
//transform.volume /= 1.1; // or this if you prefer.
channel.soundTransform = transform; //
So anytime you want the volume to decrease by this incremental amount, run this bit of code. Of course, you need to make sure that any variables you set are accessible in the code that is referencing them. One way that comes to mind to do this is with a function.
private function soundDiminish(st:SoundTransform, c:SoundChannel, factor:Number = 0.9):void
{
st.volume *= factor;
c.soundTransform = st;
}
Now, whenever you want to diminish the volume just call the soundDiminish function.
Maybe your frame event looks like this:
function onLoadFrame(fe:Event):void
{
soundDiminish(transform, channel); // 3rd parameter optional
}
If you only want this function to be called every 20 frames then:
function onLoadFrame(fe:Event):void
{
// this is a counter that will count up each time this frame event happens
frameCount ++;
if (frameCount >= 20)
{
soundDiminish(transform, channel); // 3rd parameter optional
frameCount = 0; // reset the frame counter
}
}
I try to record PCM sound from flash (using Microphone class). I use org.bytearray.micrecorder.MicRecorder helper class.
In Microphone class I cannot find property like bitDepth or bitsPerSample.
I always get 32 bits.
Is it possible to do?
UPDATE: The asker John812 was able to solve this by using..
bit16_bytes.writeShort( data.readFloat() * 32767 ); see comments below for context
METHOD #2: Based on my experience with using the LoadPCMfromByteArray method
I have something you could try but I've only used it with an actual 32bit WAVE file and played via the LoadPCMFromByteArray command.
The AS3 Microphone Class records 32 bits. You have to write the conversion of samples to a different bit-depth by yourself. I have no idea how many samples you are processing but the general code below shows you how to convert. Note: * 512 means use your actual samples amount (example: * 4096? or * 8192?) If you get the numbers wrong there'll be hiss/distortion so either experiment from small or provide the full details in your question for a more helpful edit/answer.
CONVERT: Assuming your recorded byteArray is called data
public var bit16_bytes : ByteArray; //will hold the 16bit version
public function convert_to16Bit () : void
{
bit16_bytes = new ByteArray(); data.position = 0;
while (bit16_bytes.position < data.length - 4)
//if you get noise/distortion try either: 256, 512, 1024, 2048, 4096 or 8192
{ bit16_bytes.writeShort( data.readInt() * 512 ); } //multiply by samples amount
data = new ByteArray(); //recycle for re-use
bit16_bytes.position = 0; //reset or else E-O-File error
bit16_bytes.readBytes( data ); //copy 16bit back into Data byte-array
}
To run the above function whenever you're ready just add the line convert_to16Bit(); inside whatever function deals with your "recording complete" situation.
I have searched and simply cannot find what I need (if it exists).
A window will have a large picture.
The picture will be divided into zones (such as border lines that separate states on a map).
When a person clicks within a zone, then I will raise the appropriate event.
I've used AS3 with MXML to create a database program. All is working great except for this last step. I cannot figure out how the user is within a particular area of the picture when he clicks or when he touches.
I've read and tried to come up with an approach, and there must be (hopefully so) an easier way than the muddled nonsense I'm coming up with.
Thanks
VL
Are you drawing it in flash professional CS6? If so then why can't you just have the picture as a symbol and then just self divide the lines and make those divided areas into symbols that are children of the picture symbol. You could keep the individual state symbols right where they so that they stay true to the overall picture.
A first thought would be to make an instance of this picture symbol through the code, and then loop though all the children of that picture and add a click event to each one.
var picture:Picture=new Picture();
for(var i:int=0; i<picture.numChildren-1; i++){
picture.getChildAt(i).addEventListener(MouseEvent.CLICK, mouseEventHandler);
}
Please comment if I am missing something, or this does not work.
EDIT
Well, if you know the dimensions of the image, you could divide its width and height by 3(your number of rows and columns) and this is your zone dimensions. You then could take the mouse's click point relative to the top left of your picture and then divide its width by the zone with, and its height by the zone height, and then get its integer floor value, you could get which region it is. Code it below:
//This is all for a constat region list (like a window, or floor tiles, not things irregular)
import flash.display.Sprite;
var regionsX:int = 3; //Your number of windows across the row
var regionsY:int = 3; // across the column
var regions:Array = new Array(); // an array to hold the values that you will get from where the user clicks
// All of this used a 2D array method
for(var x:int = 0; x < regionX; x++) {
regions[regionsX] = new Array();
for(var y:int = 0; y < regionY; y++) {
regions[regionsX][regionsY] = "region(".concat(x).concat(",").concat(y);
// Here you make this equal to anything you want to get a value of,
//once the correct region is found (I just have a string version here for an example)
}
}
... // other stuff..
var picture:Picture = new Picture(); // your window picture
var regionWidth:Number = picture.width / regionsX; // Gets each region's width
var regionHeight:Number = picture.height / regionsY; // Get each regoin's height
...
picture.addEventListener(MouseEvent.CLICK, mouseEventListener); // add a click listener to the picture
function mouseEventListener(event:MouseEvent):void{
var mouseX:Number = picture.globalToLocal(event.stageX); // gets where the user clicked, and then converts it
//to the picture's cordinate space. ( 50,100 acording to the stage, could be (25,200) to the picture)
var mouseY:Number = picture.globalToLocal(event.stageY); // same for the Y
var regionIntX:Number = Math.floor(mouseX / regionWidth); // Dives the point by each region's width, and then
// converts it to a while integer. (For instance, if a region's width is 100 and you click at 288, then if you do the
// math, you clicked in the 3rd region, but it returns 2... why? (becaue the array counter starts at 0, so 0 is the 1st
// region, 1 is the second and so on...
var regionIntY:Number = Math.floor(mouseY / regionHeight); // Same for Y
var yourValue:String = regions[regionIntX][regionIntY]; // This returns that you initialy put into your 2d array
// by using the regionIntX and regionIntY for the array values. You have to decide what is stored in this array...
}
The simplest solution would be to add an event listener for MouseEvent.CLICK to the picture and in the handler check properties mouseX and mouseY of the picture. Define the bounds of each area in an XML or similar and check against current mouseX/Y to see which area has been clicked.
I am a beginner in ActionScript 3, I am trying to traverse an array of MovieClips and pick hundred random Clips out of that and place those instances on stage but sometimes the code produce an undefined error. I am confused why as the code works well most of the times and there are never any compile time errors.
Here is my code:
for(var i:int = 0; i<100;i++)
{
var rndNum:Number = Math.round(Math.random()*arr.length);
this.addChild(arr[rndNum]);
}
Because you are rounding the randomly generated index which could result in an index out of bound Exception, and that is because you are generating a number up to the array's Length and the number representing the total length of an array can never be a valid index for that Array since the index starts at 0.
Simply change the Math.round to Math.floor
var rndNum:Number = Math.floor(Math.random()*arr.length);
or do a -1 from the arr's length:
var rndNum:Number = Math.round(Math.random()*(arr.length-1));
var fData:ByteArray = new ByteArray();
I need to remove some bytes in this array, but can't find any public method in Flash to do that.
I searched something like fData.remove(start,length) but with no success.
here is a code
function _dlProgressHandler(evt:ProgressEvent):void { //this is progressEvent for URLStream
............... ///some code
var ff:ByteArray = new ByteArray();
stream.readBytes(ff,0,stream.bytesAvailable);
fileData.writeBytes(ff,0,ff.length); //stream writes into fileData byteArray
//and here is cutter:
fileData.position=0;
fileData.writeBytes(ff,100,fileData.length);
fileData.length=fileData.length-100);
}
So, fileData cut itself unpredictably sometimes.
Sometimes old blocks're found twice, sometimes they're not found at all.
You can always just only read the bytes that you want, which will have the same effect as discarding the bytes that you don't want. As a very simple example, assume you have a ByteArray that is 10 bytes long and you want to discard the first 3 bytes:
var newBytes:ByteArray = new ByteArray();
newBytes.writeBytes(fData, 2, 7);
So instead of removing the bytes that you don't want from fData, you just create a new ByteArray and only get they bytes that you want from fData.
Obviously, if the sequence of bytes you want to remove is not just a sequence from the beginning or end of fData it will be a little more complicated, but the method remains the same: read the bytes that you want, instead of removing the ones you don't.
AS-3 is actually very nice sometimes. This removes bytes from your array anywhere you want. Beginning, middle or the end. Just need to check indices to avoid IndexOutOfBounds
var array: ByteArray = ...; // create the byte array or load one
var index: int = 4;
var count: int = 5;
array.position = index;
array.writeBytes(array, index + count, array.length - (index + count));
array.length = array.length - count;
I tested this and it works well, just the checks are missing
a byte array can write to itself