From 732bfb33105b4a534bc17caae9a50a1ccfcd7570 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 24 Oct 2015 19:27:39 +0000
Subject: Zero-copy to/from driver ports where possible

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@5778 a436a847-0d15-0410-975c-d299462d15a1
---
 src/server/InternalBlock.cpp | 51 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/server/InternalBlock.cpp

(limited to 'src/server/InternalBlock.cpp')

diff --git a/src/server/InternalBlock.cpp b/src/server/InternalBlock.cpp
new file mode 100644
index 00000000..5fa0bdc0
--- /dev/null
+++ b/src/server/InternalBlock.cpp
@@ -0,0 +1,51 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 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/>.
+*/
+
+#include "Buffer.hpp"
+#include "InternalBlock.hpp"
+#include "PortImpl.hpp"
+
+namespace Ingen {
+namespace Server {
+
+InternalBlock::InternalBlock(PluginImpl*         plugin,
+                             const Raul::Symbol& symbol,
+                             bool                poly,
+                             GraphImpl*          parent,
+                             SampleRate          rate)
+	: BlockImpl(plugin, symbol, poly, parent, rate)
+{}
+
+
+void
+InternalBlock::pre_process(ProcessContext& context) {
+	/* Output sequences are initialized in LV2 format, an atom:Chunk with size
+	   set to the capacity of the buffer.  Internal nodes don't care, so clear
+	   to an empty sequences so appending events results in a valid output. */
+	for (uint32_t i = 0; i < num_ports(); ++i) {
+		PortImpl* const port = _ports->at(i);
+		if (port->is_input()) {
+			port->pre_process(context);
+		} else {
+			for (uint32_t v = 0; v < port->poly(); ++v) {
+				port->buffer(v)->clear();
+			}
+		}
+	}
+}
+
+} // namespace Server
+} // namespace Ingen
-- 
cgit v1.2.1