669         return UNKNOWN_ERROR;  in setDataSource()
688             return UNKNOWN_ERROR;  in setDataSource()
725         return UNKNOWN_ERROR;  in setDataSource()
737         return UNKNOWN_ERROR;  in setDataSource()
791     if (p == 0) return UNKNOWN_ERROR;  in setVideoSurface()
813     if (p == 0) return UNKNOWN_ERROR;  in setVideoSurfaceTexture()
862     if (p == NULL) return UNKNOWN_ERROR;  in invoke()
886     if (player == 0) return UNKNOWN_ERROR;  in getMetadata()
929     if (p == 0) return UNKNOWN_ERROR;  in prepareAsync()
942     if (p == 0) return UNKNOWN_ERROR;  in start()
951     if (p == 0) return UNKNOWN_ERROR;  in stop()
959     if (p == 0) return UNKNOWN_ERROR;  in pause()
967     if (p == 0) return UNKNOWN_ERROR;  in isPlaying()
977     if (p == 0) return UNKNOWN_ERROR;  in getCurrentPosition()
991     if (p == 0) return UNKNOWN_ERROR;  in getDuration()
1005     if (p == 0) return UNKNOWN_ERROR;  in seekTo()
1013     if (p == 0) return UNKNOWN_ERROR;  in reset()
1063     if (p == 0) return UNKNOWN_ERROR;  in setParameter()
1070     if (p == 0) return UNKNOWN_ERROR;  in getParameter()