#include <stdio.h>
#include <dlfcn.h>
static int (*old) (void *a, void *b) = NULL;
int dav1d_open (void *a, void *b) {
    int max_frame_delay = *(((int*)b)+1);
    if (max_frame_delay == 1) {
        if (!old) old = dlsym(RTLD_NEXT, "dav1d_open");
        printf("dav1d_open passthrough, max_frame_delay=%d\n", max_frame_delay);
        return old(a, b);
    }
    printf("dav1d_open force -1, max_frame_delay=%d\n", max_frame_delay);
    return -1;
}