Function ff_parse_expr

libavcodec/eval.c:372–405

}

AVExpr *ff_parse_expr(const char *s, const char * const *const_name,
               double (* const *func1)(void *, double), const char * const *func1_name,
               double (* const *func2)(void *, double, double), const char * const *func2_name,
               const char **error){
    Parser p;
    AVExpr *e = NULL;
    char *w = av_malloc(strlen(s) + 1);
    char *wp = w;

    if (!w)
        goto end;

    while (*s)
        if (!isspace(*s++)) *wp++ = s[-1];
    *wp++ = 0;

    p.stack_index=100;
    p.s= w;
    p.const_name = const_name;
    p.func1      = func1;
    p.func1_name = func1_name;
    p.func2      = func2;
    p.func2_name = func2_name;
    p.error= error;

    e = parse_expr(&p);
    if (!verify_expr(e)) {
        ff_free_expr(e);
        e = NULL;
    }
end:
    av_free(w);
    return e;
}

double ff_eval_expr(AVExpr * e, const double *const_value, void *opaque) {
    Parser p;