plugin cleanup

src/nam_lv2.cpp

@@ -7,8 +7,6 @@
 // LV2
 #include <lv2/core/lv2.h>
 #include <lv2/urid/urid.h>
-#include <lv2/log/log.h>
-#include <lv2/log/logger.h>
 #include <lv2/worker/worker.h>
 
 #include "nam_plugin.h"
@@ -20,48 +18,40 @@ static LV2_Handle instantiate(
 	const char*,
 	const LV2_Feature* const* features
 ) {
-	LV2_URID_Map* map = nullptr;
-	LV2_Log_Logger logger = {};
+	try
+	{
+		auto nam = std::make_unique<NAM::Plugin>(static_cast<float>(rate));
 
-	for (size_t i = 0; features[i]; ++i) {
-		if (std::string(features[i]->URI) == std::string(LV2_URID__map))
-			map = static_cast<LV2_URID_Map*>(features[i]->data);
-		else if (std::string(features[i]->URI) == std::string(LV2_LOG__log))
-			logger.log = static_cast<LV2_Log_Log*>(features[i]->data);
-	}
+		if (nam->initialize(rate, features))
+		{
+			return static_cast<LV2_Handle>(nam.release());
+		}
 
-	lv2_log_logger_set_map(&logger, map);
-
-	if (!map) {
-		lv2_log_error(&logger, "Missing required feature: `%s`", LV2_URID__map);
 		return nullptr;
 	}
-
-	try {
-		auto nam = std::make_unique<NAM::Plugin>(static_cast<float>(rate));
-		nam->map_uris(map);
-		return static_cast<LV2_Handle>(nam.release());
-	} catch(const std::exception& e) {
-		lv2_log_error(&logger, "Failed to instantiate plugin: %s", e.what());
+	catch(const std::exception& e)
+	{
 		return nullptr;
 	}
 }
 
-static void connect_port(LV2_Handle instance, uint32_t port, void* data) {
+static void connect_port(LV2_Handle instance, uint32_t port, void* data)
+{
 	auto nam = static_cast<NAM::Plugin*>(instance);
   *(reinterpret_cast<void**>(&nam->ports)+port) = data;
 }
 
 static void activate(LV2_Handle) {}
 
-static void run(LV2_Handle instance, uint32_t n_samples) {
-
+static void run(LV2_Handle instance, uint32_t n_samples)
+{
 	static_cast<NAM::Plugin*>(instance)->process(n_samples);
 }
 
 static void deactivate(LV2_Handle) {}
 
-static void cleanup(LV2_Handle instance) {
+static void cleanup(LV2_Handle instance)
+{
 	delete static_cast<NAM::Plugin*>(instance);
 }
 
@@ -89,14 +79,14 @@ extension_data(const char* uri)
 {
 	static const LV2_Worker_Interface  worker = { work, work_response, NULL };
 
-	if (!strcmp(uri, LV2_WORKER__interface)) {
+	if (!strcmp(uri, LV2_WORKER__interface))
 		return &worker;
-	}
 
 	return NULL;
 }
 
-static const LV2_Descriptor descriptor = {
+static const LV2_Descriptor descriptor =
+{
 	"http://github.com/mikeoliphant/neural-amp-modeler-lv2",
 	instantiate,
 	connect_port,
@@ -107,6 +97,7 @@ static const LV2_Descriptor descriptor = {
 	extension_data
 };
 
-LV2_SYMBOL_EXPORT const LV2_Descriptor* lv2_descriptor(uint32_t index) {
+LV2_SYMBOL_EXPORT const LV2_Descriptor* lv2_descriptor(uint32_t index)
+{
 	return index == 0 ? &descriptor : nullptr;
 }

src/nam_plugin.cpp

@@ -2,10 +2,6 @@
 #include <cmath>
 #include <utility>
 
-// Lv2
-#include <lv2/atom/util.h>
-#include <lv2/patch/patch.h>
-
 #include "nam_plugin.h"
 
 namespace NAM {
@@ -13,7 +9,33 @@ namespace NAM {
 	{
 	}
 
-	void Plugin::map_uris(LV2_URID_Map* map) noexcept {
+	bool Plugin::initialize(double rate, const LV2_Feature* const* features) noexcept
+	{
+		for (size_t i = 0; features[i]; ++i) {
+			if (std::string(features[i]->URI) == std::string(LV2_URID__map))
+				map = static_cast<LV2_URID_Map*>(features[i]->data);
+			else if (!strcmp(features[i]->URI, LV2_WORKER__schedule))
+				schedule = (LV2_Worker_Schedule*)features[i]->data;
+			else if (std::string(features[i]->URI) == std::string(LV2_LOG__log))
+				logger.log = static_cast<LV2_Log_Log*>(features[i]->data);
+		}
+
+		lv2_log_logger_set_map(&logger, map);
+
+		if (!map)
+		{
+			lv2_log_error(&logger, "Missing required feature: `%s`", LV2_URID__map);
+
+			return false;
+		}
+
+		if (!schedule)
+		{
+			lv2_log_error(&logger, "Missing required feature: `%s`", LV2_WORKER__schedule);
+
+			return false;
+		}
+
 		lv2_atom_forge_init(&atom_forge, map);
 
 		uris.atom_Object = map->map(map->handle, LV2_ATOM__Object);
@@ -26,6 +48,8 @@ namespace NAM {
 		uris.patch_value = map->map(map->handle, LV2_PATCH__value);
 
 		uris.model_Path = map->map(map->handle, MODEL_URI);
+
+		return true;
 	}
 
 	void Plugin::process(uint32_t n_samples) noexcept {
@@ -66,7 +90,7 @@ namespace NAM {
 
 		if (namModel == nullptr)
 		{
-			for (int i = 0; i < n_samples; i++)
+			for (unsigned int i = 0; i < n_samples; i++)
 			{
 				ports.audio_out[i] = ports.audio_in[i];
 			}

src/nam_plugin.h

@@ -7,9 +7,14 @@
 #include <string_view>
 
 // LV2
+#include <lv2/core/lv2.h>
 #include <lv2/atom/atom.h>
+#include <lv2/log/log.h>
+#include <lv2/log/logger.h>
 #include <lv2/urid/urid.h>
 #include <lv2/atom/forge.h>
+#include <lv2/patch/patch.h>
+#include <lv2/worker/worker.h>
 
 #include "dsp.h"
 
@@ -29,6 +34,10 @@ namespace NAM {
 
 		Ports ports = {};
 
+		LV2_URID_Map* map;
+		LV2_Log_Logger logger;
+		LV2_Worker_Schedule* schedule;
+
 		std::unique_ptr<::DSP> namModel;
 
 		std::unordered_map<std::string, double> mNAMParams =
@@ -37,15 +46,11 @@ namespace NAM {
 			{"Output", 0.0}
 		};
 
-		/*
-			Member Functions
-		*/
 
 		Plugin(float rate);
 		~Plugin() = default;
 
-		void map_uris(LV2_URID_Map* map) noexcept;
-
+		bool initialize(double rate, const LV2_Feature* const* features) noexcept;
 		void process(uint32_t n_samples) noexcept;
 
 	private: