From 9da2840ce1fc9de08d3bd052fc535c925416c45a Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Mon, 14 Mar 2016 20:42:36 -0400
Subject: Load default plugin state

Based on a patch from Hanspeter Portner.
---
 src/server/Engine.cpp   |  4 ++++
 src/server/LV2Block.cpp | 16 ++++++++++++++++
 src/server/LV2Block.hpp |  2 ++
 3 files changed, 22 insertions(+)

(limited to 'src/server')

diff --git a/src/server/Engine.cpp b/src/server/Engine.cpp
index 90a2c200..7ab7e315 100644
--- a/src/server/Engine.cpp
+++ b/src/server/Engine.cpp
@@ -21,6 +21,7 @@
 #include <limits>
 
 #include "lv2/lv2plug.in/ns/ext/buf-size/buf-size.h"
+#include "lv2/lv2plug.in/ns/ext/state/state.h"
 
 #include "events/CreateGraph.hpp"
 #include "ingen/Configuration.hpp"
@@ -96,6 +97,9 @@ Engine::Engine(Ingen::World* world)
 	_world->lv2_features().add_feature(
 		SPtr<LV2Features::Feature>(
 			new LV2Features::EmptyFeature(LV2_BUF_SIZE__boundedBlockLength)));
+	_world->lv2_features().add_feature(
+		SPtr<LV2Features::Feature>(
+			new LV2Features::EmptyFeature(LV2_STATE__loadDefaultState)));
 }
 
 Engine::~Engine()
diff --git a/src/server/LV2Block.cpp b/src/server/LV2Block.cpp
index f7627416..e1f67897 100644
--- a/src/server/LV2Block.cpp
+++ b/src/server/LV2Block.cpp
@@ -74,6 +74,20 @@ LV2Block::~LV2Block()
 	delete _instances;
 }
 
+void
+LV2Block::load_default_state()
+{
+	const LilvPlugin* lplug    = _lv2_plugin->lilv_plugin();
+	const LilvNode*   uri_node = lilv_plugin_get_uri(lplug);
+	const Raul::URI   uri(lilv_node_as_string(uri_node));
+
+	LilvState* default_state = load_preset(_lv2_plugin->uri());
+	if (default_state) {
+		apply_state(default_state);
+		lilv_state_free(default_state);
+	}
+}
+
 SPtr<LilvInstance>
 LV2Block::make_instance(URIs&      uris,
                         SampleRate rate,
@@ -431,6 +445,8 @@ LV2Block::instantiate(BufferFactory& bufs)
 		}
 	}
 
+	load_default_state();
+
 	// FIXME: Polyphony + worker?
 	if (lilv_plugin_has_feature(plug, uris.work_schedule)) {
 		_worker_iface = (const LV2_Worker_Interface*)
diff --git a/src/server/LV2Block.hpp b/src/server/LV2Block.hpp
index e5d41006..6483f8b0 100644
--- a/src/server/LV2Block.hpp
+++ b/src/server/LV2Block.hpp
@@ -83,6 +83,8 @@ protected:
 	                                 uint32_t   voice,
 	                                 bool       preparing);
 
+	void load_default_state();
+
 	inline LilvInstance* instance(uint32_t voice) {
 		return (LilvInstance*)(*_instances)[voice].get();
 	}
-- 
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