Implement host side of buf-size via options.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4763 a436a847-0d15-0410-975c-d299462d15a1

3 files changed, 103 insertions, 13 deletions

diff --git a/src/server/Engine.cpp b/src/server/Engine.cpp
index deb1ff50..4a1afb86 100644
--- a/src/server/Engine.cpp
+++ b/src/server/Engine.cpp
@@ -35,6 +35,7 @@
 #include "Event.hpp"
 #include "EventWriter.hpp"
 #include "GraphImpl.hpp"
+#include "LV2Options.hpp"
 #include "PostProcessor.hpp"
 #include "PreProcessor.hpp"
 #include "ProcessContext.hpp"
@@ -55,10 +56,11 @@ Engine::Engine(Ingen::World* world)
 	, _broadcaster(new Broadcaster())
 	, _buffer_factory(new BufferFactory(*this, world->uris()))
 	, _control_bindings(NULL)
+	, _event_writer(new EventWriter(*this))
 	, _maid(new Raul::Maid())
+	, _options(new LV2Options(*this))
 	, _pre_processor(new PreProcessor())
 	, _post_processor(new PostProcessor(*this))
-	, _event_writer(new EventWriter(*this))
 	, _root_graph(NULL)
 	, _worker(new Worker(world->log(), event_queue_size()))
 	, _process_context(*this)
@@ -72,6 +74,7 @@ Engine::Engine(Ingen::World* world)
 	_control_bindings = new ControlBindings(*this);
 
 	_world->lv2_features().add_feature(_worker->schedule_feature());
+	_world->lv2_features().add_feature(_options);
 }
 
 Engine::~Engine()
@@ -179,6 +182,7 @@ Engine::activate()
 	ThreadManager::single_threaded = true;
 
 	_buffer_factory->set_block_length(_driver->block_length());
+	_options->set(*this);
 
 	_pre_processor->start();
 
diff --git a/src/server/Engine.hpp b/src/server/Engine.hpp
index 2d49bde0..692fbee8 100644
--- a/src/server/Engine.hpp
+++ b/src/server/Engine.hpp
@@ -42,6 +42,7 @@ class Driver;
 class Event;
 class EventWriter;
 class GraphImpl;
+class LV2Options;
 class PostProcessor;
 class PreProcessor;
 class ProcessContext;
@@ -92,7 +93,7 @@ public:
 	Ingen::World* world() const { return _world; }
 
 	EventWriter*     interface()        const { return _event_writer; }
-	BlockFactory*    block_factory()     const { return _block_factory; }
+	BlockFactory*    block_factory()    const { return _block_factory; }
 	Broadcaster*     broadcaster()      const { return _broadcaster; }
 	BufferFactory*   buffer_factory()   const { return _buffer_factory; }
 	ControlBindings* control_bindings() const { return _control_bindings; }
@@ -112,17 +113,18 @@ public:
 private:
 	Ingen::World* _world;
 
-	BlockFactory*     _block_factory;
-	Broadcaster*      _broadcaster;
-	BufferFactory*    _buffer_factory;
-	ControlBindings*  _control_bindings;
-	SharedPtr<Driver> _driver;
-	Raul::Maid*       _maid;
-	PreProcessor*     _pre_processor;
-	PostProcessor*    _post_processor;
-	EventWriter*      _event_writer;
-	GraphImpl*        _root_graph;
-	Worker*           _worker;
+	BlockFactory*         _block_factory;
+	Broadcaster*          _broadcaster;
+	BufferFactory*        _buffer_factory;
+	ControlBindings*      _control_bindings;
+	SharedPtr<Driver>     _driver;
+	EventWriter*          _event_writer;
+	Raul::Maid*           _maid;
+	SharedPtr<LV2Options> _options;
+	PreProcessor*         _pre_processor;
+	PostProcessor*        _post_processor;
+	GraphImpl*            _root_graph;
+	Worker*               _worker;
 
 	ProcessContext _process_context;
 
diff --git a/src/server/LV2Options.hpp b/src/server/LV2Options.hpp
new file mode 100644
index 00000000..fd3801f1
--- /dev/null
+++ b/src/server/LV2Options.hpp
@@ -0,0 +1,84 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_ENGINE_LV2OPTIONS_HPP
+#define INGEN_ENGINE_LV2OPTIONS_HPP
+
+#include "ingen/LV2Features.hpp"
+#include "lv2/lv2plug.in/ns/ext/options/options.h"
+
+#include "BlockImpl.hpp"
+#include "BufferFactory.hpp"
+#include "Driver.hpp"
+#include "Engine.hpp"
+
+namespace Ingen {
+namespace Server {
+
+struct LV2Options : public Ingen::LV2Features::Feature {
+	LV2Options(Engine& engine)
+		: _block_length(0)
+		, _seq_size(0)
+	{
+		set(engine);
+	}
+
+	static void delete_feature(LV2_Feature* feature) {
+		free(feature->data);
+		free(feature);
+	}
+
+	void set(Engine& engine) {
+		if (engine.driver()) {
+			_block_length = engine.driver()->block_length();
+			_seq_size = engine.buffer_factory()->default_size(
+				engine.world()->uris().atom_Sequence);
+		}
+	}
+		
+	SharedPtr<LV2_Feature> feature(World* w, Node* n) {
+		BlockImpl* block = dynamic_cast<BlockImpl*>(n);
+		if (!block) {
+			return SharedPtr<LV2_Feature>();
+		}
+		Engine& engine = block->parent_graph()->engine();
+		URIs&   uris   = engine.world()->uris();
+		const LV2_Options_Option options[] = {
+			{ uris.bufsz_minBlockLength, sizeof(int32_t), uris.atom_Int,
+			  &_block_length },
+			{ uris.bufsz_maxBlockLength, sizeof(int32_t), uris.atom_Int,
+			  &_block_length },
+			{ uris.bufsz_sequenceSize, sizeof(int32_t), uris.atom_Int,
+			  &_seq_size },
+			{ 0, 0, 0, NULL }
+		};
+
+		LV2_Feature* f = (LV2_Feature*)malloc(sizeof(LV2_Feature));
+		f->URI  = LV2_OPTIONS__options;
+		f->data = malloc(sizeof(options));
+		memcpy(f->data, options, sizeof(options));
+		return SharedPtr<LV2_Feature>(f, &delete_feature);
+	}
+
+private:
+	int32_t _block_length;
+	int32_t _seq_size;
+};
+
+} // namespace Server
+} // namespace Ingen
+
+#endif // INGEN_ENGINE_LV2OPTIONS_HPP