proc av_thread_message_flush(mq: ptr AVThreadMessageQueue) {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_alloc(mq: ptr ptr AVThreadMessageQueue;
                                   nelem, elsize: cuint): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_free(mq: ptr ptr AVThreadMessageQueue) {.importc,
    cdecl, ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_nb_elems(mq: ptr AVThreadMessageQueue): cint {.
    importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_recv(mq: ptr AVThreadMessageQueue; msg: pointer;
                                  flags: cuint): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_send(mq: ptr AVThreadMessageQueue; msg: pointer;
                                  flags: cuint): cint {.importc, cdecl,
    ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_set_err_recv(mq: ptr AVThreadMessageQueue;
    err: cint) {.importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_set_err_send(mq: ptr AVThreadMessageQueue;
    err: cint) {.importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_thread_message_queue_set_free_func(mmq: ptr AVThreadMessageFlags;
    free_func: proc (msg: pointer)) {.importc, cdecl, ...raises: [], tags: [],
                                      forbids: [].}