int x264_threadpool_init( x264_threadpool_t **p_pool, int threads,
void (*init_func)(void *), void *init_arg );
void x264_threadpool_run( x264_threadpool_t *pool, void *(*func)(void *), void *arg );
int x264_threadpool_init( x264_threadpool_t **p_pool, int threads,
void (*init_func)(void *), void *init_arg );
void x264_threadpool_run( x264_threadpool_t *pool, void *(*func)(void *), void *arg );