Implement libcamera ScalerCrop setting

[2konrad]

I like to submit the ScalerCrop property to libcamera to be able to crop the picture before analyzing.
It is not implemented yet. An "x-y-h-w" string needs to be set as Rectangle::Rectangle(x,y,h,w).

Can somebody help to achive this? I am not so familiar with C ...

motionplus/src/libcam.cpp

Line 341 in 33e13c4

if (mystrceq(pname,"ScalerCrop")) {

Split string how-to:
https://favtutor.com/blogs/split-string-cpp
ScalerCrop reference:
https://libcamera.org/api-html/classlibcamera_1_1Rectangle.html#a94332066625a5986ed7a51256af75a88
https://libcamera.org/api-html/namespacelibcamera_1_1controls.html

[2konrad]

I implemented it - found the solution myself. It works well with libcamera.

 if (mystrceq(pname,"ScalerCrop")) {

        char *x, *y, *w, *h;
        x = strtok(pvalue, "-");
        y = strtok(0, "-");
        w = strtok(0, "-");
        h = strtok(0, "-");
        if (h != NULL) {
    		controls.set(controls::ScalerCrop, Rectangle(atoi(x),atoi(y),atoi(w),atoi(h)) );    
        }
    }