WebPWorkerChangeState  189 3rdparty/libwebp/utils/thread.c   WebPWorkerChangeState(worker, OK);
WebPWorkerChangeState  220 3rdparty/libwebp/utils/thread.c   WebPWorkerChangeState(worker, WORK);
WebPWorkerChangeState  230 3rdparty/libwebp/utils/thread.c     WebPWorkerChangeState(worker, NOT_OK);