From c0af61632938f161dd2e15dec3c5260a3d5427ca Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 29 Sep 2007 21:39:53 +0000
Subject: Work towards port monitoring and better (higher utilization) parallel
 execution.

git-svn-id: http://svn.drobilla.net/lad/ingen@784 a436a847-0d15-0410-975c-d299462d15a1
---
 .../engine/events/EnablePortNotificationEvent.cpp  | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/libs/engine/events/EnablePortNotificationEvent.cpp

(limited to 'src/libs/engine/events/EnablePortNotificationEvent.cpp')

diff --git a/src/libs/engine/events/EnablePortNotificationEvent.cpp b/src/libs/engine/events/EnablePortNotificationEvent.cpp
new file mode 100644
index 00000000..992c1615
--- /dev/null
+++ b/src/libs/engine/events/EnablePortNotificationEvent.cpp
@@ -0,0 +1,80 @@
+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) 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 General Public License for details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "RequestPortValueEvent.hpp"
+#include <string>
+#include "interface/ClientInterface.hpp"
+#include "Responder.hpp"
+#include "Engine.hpp"
+#include "Port.hpp"
+#include "ObjectStore.hpp"
+#include "ClientBroadcaster.hpp"
+#include "AudioBuffer.hpp"
+
+using std::string;
+
+namespace Ingen {
+
+
+RequestPortValueEvent::RequestPortValueEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& port_path)
+: QueuedEvent(engine, responder, timestamp),
+  _port_path(port_path),
+  _port(NULL),
+  _value(0.0)
+{
+}
+
+
+void
+RequestPortValueEvent::pre_process()
+{
+	_port = _engine.object_store()->find_port(_port_path);
+
+	QueuedEvent::pre_process();
+}
+
+
+void
+RequestPortValueEvent::execute(SampleCount nframes, FrameTime start, FrameTime end)
+{
+	QueuedEvent::execute(nframes, start, end);
+	assert(_time >= start && _time <= end);
+
+	if (_port != NULL && _port->type() == DataType::FLOAT)
+		_value = ((AudioBuffer*)_port->buffer(0))->value_at(0/*_time - start*/);
+	else 
+		_port = NULL; // triggers error response
+}
+
+
+void
+RequestPortValueEvent::post_process()
+{
+	string msg;
+	if (!_port) {
+		_responder->respond_error("Unable to find port for get_value responder.");
+	} else if (_responder->client()) {
+		_responder->respond_ok();
+		_responder->client()->control_change(_port_path, _value);
+	} else {
+		_responder->respond_error("Unable to find client to send port value");
+	}
+}
+
+
+} // namespace Ingen
+
-- 
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