catch error if NAM model fails to load

src/nam_plugin.h

@@ -0,0 +1,69 @@
+#pragma once
+
+#include <array>
+#include <cstddef>
+#include <cstdint>
+#include <random>
+#include <string_view>
+
+// LV2
+#include <lv2/atom/atom.h>
+#include <lv2/urid/urid.h>
+#include <lv2/atom/forge.h>
+
+#include "dsp.h"
+
+#define PlUGIN_URI "http://github.com/mikeoliphant/neural-amp-modeler-lv2"
+#define MODEL_URI PlUGIN_URI "#model"
+
+namespace NAM {
+
+	class Plugin {
+	public:
+		struct Ports {
+			const LV2_Atom_Sequence* control;
+			LV2_Atom_Sequence* notify;
+			const float* audio_in;
+			float* audio_out;
+		};
+
+		Ports ports = {};
+
+		std::unique_ptr<::DSP> namModel;
+
+		std::unordered_map<std::string, double> mNAMParams =
+		{
+			{"Input", 0.0},
+			{"Output", 0.0}
+		};
+
+		/*
+			Member Functions
+		*/
+
+		Plugin(float rate);
+		~Plugin() = default;
+
+		void map_uris(LV2_URID_Map* map) noexcept;
+
+		void process(uint32_t n_samples) noexcept;
+
+	private:
+		struct URIs {
+			LV2_URID atom_Object;
+			LV2_URID atom_Float;
+			LV2_URID atom_Int;
+			LV2_URID atom_Path;
+			LV2_URID atom_URID;
+			LV2_URID patch_Set;
+			LV2_URID patch_property;
+			LV2_URID patch_value;
+			LV2_URID model_Path;
+		};
+
+		URIs uris = {};
+		LV2_Atom_Forge atom_forge = {};
+
+		float m_rate;
+	};
+}