Error in IOS

[ranulfo]

Hi from Brasil, thanks for the source. these work perfectly in Android, but in IOS an error ocorrer in this line:

p.asTypedList(s[0]).setRange(0, s[0], availableImage.planes[0].bytes);

error:

_* thread #9, name = 'io.flutter.1.ui', stop reason = EXC_BAD_ACCESS (code=1, address=0x111e70000) frame #0: 0x000000018034e958 libsystem_platform.dylib_platform_memmove + 88 libsystem_platform.dylibplatform_memmove: -> 0x18034e958 <+88>: stnp x8, x9, [x3] 0x18034e95c <+92>: stnp x10, x11, [x3, #0x10] 0x18034e960 <+96>: add x3, x3, #0x20 ; =0x20 0x18034e964 <+100>: ldnp x8, x9, [x1] Target 0: (Runner) stopped. Lost connection to device.

Can someone help me ?

[as1605]

Hey there!

Thanks for checking out the repo! Can you try printing the values of availableImage.format.group, availableImage.planes.length, availableImage.planes[0].bytes.length, availableImage.height and availableImage.width before this line? (for both android and iOS) It will help diagnose the issue

[ranulfo]

Hey there!

Thanks for checking out the repo! Can you try printing the values of availableImage.format.group, availableImage.planes.length, availableImage.planes[0].bytes.length, availableImage.height and availableImage.width before this line? (for both android and iOS) It will help diagnose the issue

in IOS: flutter: --> availableImage.format.group: ImageFormatGroup.bgra8888 flutter: --> availableImage.planes.length :1 flutter: --> availableImage.planes[0].bytes.length: 405504 flutter: --> availableImage.height: 352 flutter: --> availableImage.width: 288

Android: I/flutter (16638): --> availableImage.format.group: ImageFormatGroup.jpeg I/flutter (16638): --> availableImage.planes.length :1 I/flutter (16638): --> availableImage.planes[0].bytes.length: 13066 I/flutter (16638): --> availableImage.height: 240 I/flutter (16638): --> availableImage.width: 320

Obs: The selected imageFormatGroup.jpeg is not supported by iOS. Defaulting to brga8888

thank's

[as1605]

Yeah so I think the problem must be due to the format.

Try allocating 4*height*width bytes instead of 3*height*width

And also in the opencv code, will have to take care that the image is in brga and not jpeg

[ranulfo]

Yeah so I think the problem must be due to the format.

Try allocating 4*height*width bytes instead of 3*height*width

And also in the opencv code, will have to take care that the image is in brga and not jpeg

thank you for you attention. but this not work yeat. error: _libc++abi.dylib: terminating with uncaught exception of type cv::Exception: OpenCV(4.5.3) /Volumes/build-storage/build/master_iOS-mac/opencv/modules/imgproc/src/smooth.dispatch.cpp:617: error: (-215:Assertion failed) !_src.empty() in function 'GaussianBlur'

• thread #10, name = 'io.flutter.1.ui', stop reason = signal SIGABRT frame #0: 0x0000000190cc0ebc libsystem_kernel.dylib__pthread_kill + 8 libsystem_kernel.dylib_pthread_kill: -> 0x190cc0ebc <+8>: b.lo 0x190cc0ed8 ; <+36> 0x190cc0ec0 <+12>: stp x29, x30, [sp, #-0x10]! 0x190cc0ec4 <+16>: mov x29, sp 0x190cc0ec8 <+20>: bl 0x190c9ff24 ; cerror_nocancel Target 0: (Runner) stopped. Lost connection to device.

[ranulfo]

I tried to converted camera bgra image to a dart image 'package:image/image.dart' and then converted a dart image to a jpg image before assigning to pointer. like this:

if (availableImage.format.group == ImageFormatGroup.bgra8888) {
                  imglib.Image img = imglib.Image.fromBytes(
                    availableImage.width,
                    availableImage.height,
                    availableImage.planes[0].bytes,
                    format: imglib.Format.bgra,
                  );
                  imglib.JpegEncoder jpegEncoder = imglib.JpegEncoder();
                  List<int> bytes = jpegEncoder.encodeImage(img);
                  p = malloc.allocate(bytes.length);
                  p.asTypedList(bytes.length).setRange(0, bytes.length, bytes);
                  s[0] = bytes.length;
}
 imageffi(p, s); 

but, after some interactions the memory look leak:

_* thread #9, name = 'io.flutter.1.ui', stop reason = EXC_BAD_ACCESS (code=1, address=0x106de0000) frame #0: 0x0000000190bd69a4 libsystem_platform.dylib_platform_memmove + 164 libsystem_platform.dylibplatform_memmove: -> 0x190bd69a4 <+164>: ldnp x12, x13, [x1] 0x190bd69a8 <+168>: ldnp x14, x15, [x1, #0x10] 0x190bd69ac <+172>: sub x5, x3, x0 0x190bd69b0 <+176>: add x1, x1, x5 Target 0: (Runner) stopped. Lost connection to device.

[ranulfo]

I tried to converted camera bgra image to a dart image 'package:image/image.dart' and then converted a dart image to a jpg image before assigning to pointer. like this:

if (availableImage.format.group == ImageFormatGroup.bgra8888) {
                  imglib.Image img = imglib.Image.fromBytes(
                    availableImage.width,
                    availableImage.height,
                    availableImage.planes[0].bytes,
                    format: imglib.Format.bgra,
                  );
                  imglib.JpegEncoder jpegEncoder = imglib.JpegEncoder();
                  List<int> bytes = jpegEncoder.encodeImage(img);
                  p = malloc.allocate(bytes.length);
                  p.asTypedList(bytes.length).setRange(0, bytes.length, bytes);
                  s[0] = bytes.length;
}
 imageffi(p, s); 

but, after some interactions the memory look leak:

_* thread #9, name = 'io.flutter.1.ui', stop reason = EXC_BAD_ACCESS (code=1, address=0x106de0000) frame #0: 0x0000000190bd69a4 libsystem_platform.dylib_platform_memmove + 164 libsystem_platform.dylibplatform_memmove: -> 0x190bd69a4 <+164>: ldnp x12, x13, [x1] 0x190bd69a8 <+168>: ldnp x14, x15, [x1, #0x10] 0x190bd69ac <+172>: sub x5, x3, x0 0x190bd69b0 <+176>: add x1, x1, x5 Target 0: (Runner) stopped. Lost connection to device.

I solved this now! I used p = calloc(bytes.length);instead p = malloc.allocate(bytes.length);and calloc.free(p); instead malloc.free(p); and this source is work now on IOS. But the manipulation of the images seems to be heavy and this interferes with the result of the preview image (the display blinks). Maybe there is a better solution

[ioridev]

@ranulfo Do you do it this way? I can't get it to work.

* thread #2, queue = 'io.flutter.camera.dispatchqueue', stop reason = signal SIGABRT
    frame #0: 0x00000001e8447674 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`:
->  0x1e8447674 <+8>:  b.lo   0x1e8447694               ; <+40>
    0x1e8447678 <+12>: pacibsp 
    0x1e844767c <+16>: stp    x29, x30, [sp, #-0x10]!
    0x1e8447680 <+20>: mov    x29, sp