Add data level codes, refactor data value determination to product description block

wxdata/include/scwx/wsr88d/rpg/product_description_block.hpp

@@ -1,9 +1,11 @@
 #pragma once
 
 #include <scwx/awips/message.hpp>
+#include <scwx/wsr88d/rpg/rpg_types.hpp>
 
 #include <cstdint>
 #include <memory>
+#include <optional>
 
 #include <units/angle.h>
 
@@ -61,6 +63,9 @@ public:
    float    scale() const;
    uint16_t number_of_levels() const;
 
+   std::optional<DataLevelCode> data_level_code(std::uint8_t level) const;
+   std::optional<float>         data_value(std::uint8_t level) const;
+
    float log_offset() const;
    float log_scale() const;
 

wxdata/include/scwx/wsr88d/rpg/rpg_types.hpp

@@ -0,0 +1,58 @@
+#pragma once
+
+namespace scwx
+{
+namespace wsr88d
+{
+namespace rpg
+{
+
+enum class DataLevelCode
+{
+   BadData,
+   BelowThreshold,
+   Blank,
+   ChaffDetection,
+   EditRemove,
+   FlaggedData,
+   Missing,
+   NoData,
+   OutsideCoverageArea,
+   NoAccumulation,
+   RangeFolded,
+   Reserved,
+
+   // Hydrometeor Classification
+   Biological,
+   AnomalousPropagationGroundClutter,
+   IceCrystals,
+   DrySnow,
+   WetSnow,
+   LightAndOrModerateRain,
+   HeavyRain,
+   BigDrops,
+   Graupel,
+   SmallHail,
+   LargeHail,
+   GiantHail,
+   UnknownClassification,
+
+   // Rainfall Rate Classification
+   NoPrecipitation,
+   Unfilled,
+   Convective,
+   Tropical,
+   SpecificAttenuation,
+   KL,
+   KH,
+   Z1,
+   Z6,
+   Z8,
+   SI,
+
+   Unknown
+};
+
+} // namespace rpg
+} // namespace wsr88d
+} // namespace scwx