SDL_GetNumCameraDrivers - Use this function to get the number of built-in camera drivers.

       This function is available since SDL 3.2.0.

       This  function  returns  a hardcoded number. This never returns a negative value; if there are no drivers
       compiled into this build of SDL, this function returns zero. The presence of a driver in this  list  does
       not  mean it will function, it just means SDL is capable of interacting with that interface. For example,
       a build of SDL might have v4l2 support, but if there's no kernel support  available,  SDL's  v4l2  driver
       would fail if used.

       By default, SDL tries all drivers, in its preferred order, until one is found to be usable.

       SDL_GetNumCameraDrivers - Use this function to get the number of built-in camera drivers.

       Returns the number of built-in camera drivers.

SDL_GetCameraDriver(3)

Simple Directmedia Layer                           SDL 3.2.20                         SDL_GetNumCameraDrivers(3)

#include<SDL3/SDL_camera.h>intSDL_GetNumCameraDrivers(void);

       It is safe to call this function from any thread.