Android Studio app using openCV with openCL

Question

I am very new to Android and I have to code an Android app with openCV.

I try to run the Use OpenCL in Android camera preview based CV application tutorial under Android studio.

I downloaded openCV 3.4 for android and imported the module into my project.

I used adb pull to get libOpenCL.so from my Samsung J5 (which I know supports openCL).

I downloaded OpenCL 1.1 header files and put them in /usr/include/CL

I integrated the java and cpp files from the tutorial samples repo and added the cpp into CMake

In my CMakeList.txt I have:

add_library( # Sets the name of the library.
         native-lib

         # Sets the library as a shared library.
         SHARED

         # Provides a relative path to your source file(s).
         src/main/cpp/native-lib.cpp
         src/main/cpp/jni.c
         src/main/cpp/CLProcessor.cpp)

But I am getting TONS of error like

Error:(749, 23) error: use of undeclared identifier 'malloc'; did you mean 'alloca'?

or

Error:(36, 2) error: Bionic header ctype.h does not define either _U nor _CTYPE_U

Since this is my first ever Android project I am completly lost (I read a lot of papers/answers...).

Can anyone help me?

EDIT: I found why I had these particular compile error: I retrieved openCL 1.1 headers and changing them to 1.2 fixed compile error.

I managed to successfuly compile openCL with openCV (but even though my device has openCL with CL-GL interop, the platform has no openCL extensions at all).

(I have Android Studio 3.0.1 under Debian 9.3.)

Do it step by step, First try integrating only OpenCV and when everything is working fine, try OpenCL. — ZdaR
– ZdaR, Commented Feb 6, 2018 at 4:50

Krapow · Accepted Answer · 2018-02-07 10:20:03Z

1

This compile error is caused by use of openCL 1.1 headers. Use openCl 1.2 instead.

answered Feb 7, 2018 at 10:20

Krapow

6417 silver badges28 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Android Studio app using openCV with openCL

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related