input and output level control ports

resources/neural_amp_modeler.ttl.in

@@ -67,4 +67,25 @@
 		lv2:index 3;
 		lv2:symbol "output";
 		lv2:name "Output";
+	];
+
+	# Parameters
+	lv2:port [
+		a lv2:ControlPort, lv2:InputPort;
+		lv2:index 4;
+		lv2:symbol "input_level";
+		lv2:name "Input Lvl";
+		lv2:default 0.0;
+		lv2:minimum -20.0;
+		lv2:maximum 20.0;
+		units:unit units:db;
+	], [
+		a lv2:ControlPort, lv2:InputPort;
+		lv2:index 5;
+		lv2:symbol "output_level";
+		lv2:name "Output Lvl";
+		lv2:default 0.0;
+		lv2:minimum -20.0;
+		lv2:maximum 20.0;
+		units:unit units:db;
 	].

src/nam_plugin.cpp

@@ -147,17 +147,26 @@ namespace NAM {
 			}
 		}
 
-		if (currentModel == nullptr)
-		{
+		float inputLevel = pow(10, *(ports.input_level) * 0.05);
+		float outputLevel = pow(10, *(ports.output_level) * 0.05);
+
 		for (unsigned int i = 0; i < n_samples; i++)
 		{
-				ports.audio_out[i] = ports.audio_in[i];
+			ports.audio_out[i] = ports.audio_in[i] * inputLevel;
 		}
+
+		if (currentModel == nullptr)
+		{
 		}
 		else
 		{
-			currentModel->process(ports.audio_in, ports.audio_out, n_samples, 1.0, 1.0, mNAMParams);
+			currentModel->process(ports.audio_out, ports.audio_out, n_samples, 1.0, 1.0, mNAMParams);
 			currentModel->finalize_(n_samples);
 		}
+
+		for (unsigned int i = 0; i < n_samples; i++)
+		{
+			ports.audio_out[i] *= outputLevel;
+		}
 	}
 }

src/nam_plugin.h

@@ -40,6 +40,8 @@ namespace NAM {
 			LV2_Atom_Sequence* notify;
 			const float* audio_in;
 			float* audio_out;
+			float* input_level;
+			float* output_level;
 		};
 
 		Ports ports = {};
@@ -51,11 +53,7 @@ namespace NAM {
 		std::unique_ptr<::DSP> currentModel;
 		std::unique_ptr<::DSP> stagedModel;
 
-		std::unordered_map<std::string, double> mNAMParams =
-		{
-			{"Input", 0.0},
-			{"Output", 0.0}
-		};
+		std::unordered_map<std::string, double> mNAMParams = {};
 
 
 		Plugin(float rate);