From e435554efa3f7a6b9dba2320b6c10f49a027dec8 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 31 Aug 2012 18:07:47 +0000
Subject: Implement host side of buf-size via options.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4763 a436a847-0d15-0410-975c-d299462d15a1
---
 src/server/LV2Options.hpp | 84 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 src/server/LV2Options.hpp

(limited to 'src/server/LV2Options.hpp')

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
-- 
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