topic Re: AppStudio for ArcGIS / Memory leaks in ArcGIS AppStudio Questions

AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Tue, 10 Jan 2017 14:53:04 GMT

Hi, im working with the AppStudio for ArcGIS and I noticed that the memory is not released properly in many applications made by Esri like Palm Spring Map Tour, Map Tour, Survey 123 (when i use de barcode scanner)

BarcodeDecoder:

I'm developing an application where i have to use a barcode scanner and after some failed barcode scanning the memory usage increase too much.
As i was having troubles with it, I downloaded and used exactly the same code of the survey 123 to decode barcodes and I still having the same behaviour.

The same happens with the barcode scanner of the AppStudio Player.

Map:

AppStudio for ArcGIS / Map memory leaks

I attached some videos

Any help will be greatly appreciated.

Re: AppStudio for ArcGIS / Memory leaks

SathyaPrasad — Wed, 11 Jan 2017 05:18:15 GMT

Let us check and get back to you. We will contact you via your email for further questions and findings.

cc:

@Anshuman Mathur‌

Stephen Quan‌

SSuresh-esristaff‌

Re: AppStudio for ArcGIS / Memory leaks

StephenQuan1 — Thu, 12 Jan 2017 05:32:33 GMT

Rodrigo,

Can you tell us which versions of AppStudio and Survey123 you were using?

Stephen

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Thu, 12 Jan 2017 12:49:04 GMT

Stephen,

How are you?

The Survey123 version that I am trying is 1.10.23 and the AppFramework Versión is 1.3.41

Let me see if i can upload a video running in my android phone

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Thu, 12 Jan 2017 13:05:14 GMT

(view in My Videos)

Stephen Quan‌

If you solve this please let me know because I could use the solution in an applicaton that I'am developing

Thank you.

Re: AppStudio for ArcGIS / Memory leaks

StephenQuan1 — Thu, 12 Jan 2017 21:55:31 GMT

Hi Rodrigo,

From the video it appears that your device is Android?

Can you elaborate what kind of device it is? Of particularly interest is which OS?

There's several components used in Barcode scanning:

- Image Capture to memory and/or disk

- Barcode Decoder library

I don't suppose you would be able to help us narrow this down?

This would involve writing variations to the app that:

(1) Turns on the Barcode Decoder itself, and focus on the Image Capture

(2) Turn of the Image Capture, i.e. lock it to a still image, but run the Barcode Decoder library repeatedly.

Stephen

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Sun, 12 Dec 2021 16:55:45 GMT

Stephen,

Device specifications of (LG G2 mini)

Hardware
CPU: Quad-core 1.2 GHz Cortex-A7
Memory: 8 GB, 1 GB RAM

Software

OS: Android 5.0.2

More about this device at LG G2 mini - Full phone specifications

I 'm also having the same behaviour with this other device

Device specifications of (LG G4)

Hardware
CPU: Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57)

Memory: 32 GB, 3 GB RAM

Software

OS: Android 6.0

More about this device at LG G4 - Full phone specifications

I will try to follow those steps and I write back.

Can u help me with this? AppStudio for ArcGIS / Map memory leaks
Because in Survey123 this works fine.
Looking at the code, of Survey123 template in appstudio I have a doubt about this:

After searching for a .qml with Map controler in the code, to see the implementation, I found XFormGeopointControl.qml.

Looking at the imports, those are the following:

import QtQuick 2.5

import QtQuick.Controls 1.4

import QtQuick.Layouts 1.1

import QtLocation 5.3

import QtPositioning 5.3

import QtGraphicalEffects 1.0

import ArcGIS.AppFramework 1.0
import ArcGIS.AppFramework.Controls 1.0

import "XForm.js" as JS

But just with those imports I can not use the Map Controler. Am i missing something?

Thank you.

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Sun, 12 Dec 2021 16:55:48 GMT

After some test I found this function

 
function scanGrab() {

videoOutput.grabToImage(function(res) {

decodeGrab(res.image);

        } );

  }

grabToImage what it does according qt documentation is "Grabs the item into an in-memory image". 

I think this memory used is not beign released at all.

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Sun, 12 Dec 2021 09:12:33 GMT


function scanGrab() { //THIS LEAKS MEMORY

videoOutput.grabToImage(function(res) {

//decodeGrab(res.image);// I comment this

        } );



function scanGrab() { // THIS NO LEAKS MEMORY

videoOutput.grabToImage(function(res) {

//decodeGrab(res.image);// I comment this

res.destroy();

        } );

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Sun, 12 Dec 2021 09:12:36 GMT

With this function I have not more memory leak

function scanGrab() { // THIS NO LEAKS MEMORY

videoOutput.grabToImage(function(res) {

//decodeGrab(res.image);// I comment this

res.destroy();

        } );

  }
However I still having memory leak with this

function scanGrab() {

videoOutput.grabToImage(function(res) {

decodeGrab(res.image);

res.destroy();

        } );

decodeGrab was implemented like this

function decodeGrab(image) {
   imageObject.image = image;
   imageObject.clip(captureFrame.x + 5, captureFrame.y + 5, captureFrame.width - 10, captureFrame.height - 10);
   var testColor = imageObject.pixel(imageObject.width >> 1, imageObject.height >> 1);
   if (Qt.colorEqual(testColor, "black")) {
      scanMode = scanModeCapture;
      scanCapture();
      return;
   }
   barcodeDecoder.rotated = false;
   barcodeDecoder.decode(imageObject.url);
}

I tried by making imageObject dynamic in order to destroy it after it usage perhaps this was leaking memory, so after made some changes both functions

 function scanGrab() {
            videoOutput.grabToImage(function(res) {
                createImageObject();//create imageObject dinamically
                imageObject.image = res.image;
                decodeGrab()
                res.destroy();
            } );
    }
    //--------------------------------------------------------------------------
    function decodeGrab() {
        imageObject.clip(captureFrame.x + 5, captureFrame.y + 5, captureFrame.width - 10, captureFrame.height - 10);
        var testColor = imageObject.pixel(imageObject.width >> 1, imageObject.height >> 1);
        /*if (Qt.colorEqual(testColor, "black")) {
            scanMode = scanModeCapture;
            scanCapture();
            return;
        }*/
        barcodeDecoder.rotated = false;
        barcodeDecoder.decode(imageObject.url);
        imageObject.destroy();
    }

But still leaking memory. Now i think it's barcodeDecoder.decode method.

I hope all this can help you.

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Fri, 13 Jan 2017 18:20:05 GMT

I also test what you told me, I take only one Image, and try by decoding repeatedly and i got memory leaks so I think the problem is with the BarcodeDecoder controler when decoding

Re: AppStudio for ArcGIS / Memory leaks

StephenQuan1 — Sun, 15 Jan 2017 21:56:29 GMT

Hi Rodrigo,

Our QR code scanner has two modes.

One, as you discovered, takes a screenshot and analyses the screenshot, aka. scanMode = scanModeGrab.

From what you're saying, there appears to be a memory leak within scanGrab() which we need to narrow down. Your last conclusion is it is possibly withing the BarcodeDecoder itself, but, I just wanted to be sure.

The other scan mode, scanMode = scanModeCapture takes a photo and saves it to a JPEG file which we subsequently use to process the image. Can you try switching to this mode to see if the memory utilization is, either, better, same or worse?

Stephen

Re: AppStudio for ArcGIS / Memory leaks

RodrigoPintos — Sun, 12 Dec 2021 09:12:38 GMT

Hi Stephen,

I have tested the application again, this time with scanMode = scanModeCapture. I took an image and I started decoding it repeatedly. The memory is still leaking.

In my opinion, the problem is in the BarDecoder component which is not releasing the memory properly.

In the AppStudioPlayer-BarCodeScanner.mp4. video I attached previously, you can see how "Scan QR Code" within AppStudio Player, has the same behaviour.

In both videos , the upper leftmost part of the screen show the decrement of memory for each barcode scan.

PD.

I would suggest to make the following changes to survey123 ( in order to destroy "res" after grabToImage)

videoOutput.grabToImage(function(res) {
                .......
                res.destroy();
            } );

and perhaps make the imageObject dynamic.