Add time internal that sends Jack transport updates as LV2 time positions.

git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4819 a436a847-0d15-0410-975c-d299462d15a1

2 files changed, 141 insertions, 0 deletions

diff --git a/src/server/internals/Time.cpp b/src/server/internals/Time.cpp
new file mode 100644
index 00000000..73a0c89c
--- /dev/null
+++ b/src/server/internals/Time.cpp
@@ -0,0 +1,82 @@
+/*
+  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/>.
+*/
+
+#include "ingen/URIs.hpp"
+#include "lv2/lv2plug.in/ns/ext/atom/util.h"
+#include "lv2/lv2plug.in/ns/ext/midi/midi.h"
+
+#include "Buffer.hpp"
+#include "Driver.hpp"
+#include "Engine.hpp"
+#include "InternalPlugin.hpp"
+#include "OutputPort.hpp"
+#include "PostProcessor.hpp"
+#include "ProcessContext.hpp"
+#include "internals/Time.hpp"
+#include "util.hpp"
+
+namespace Ingen {
+namespace Server {
+namespace Internals {
+
+InternalPlugin* TimeNode::internal_plugin(URIs& uris) {
+	return new InternalPlugin(
+		uris, Raul::URI(NS_INTERNALS "Time"), Raul::Symbol("time"));
+}
+
+TimeNode::TimeNode(InternalPlugin*     plugin,
+                   BufferFactory&      bufs,
+                   const Raul::Symbol& symbol,
+                   bool                polyphonic,
+                   GraphImpl*          parent,
+                   SampleRate          srate)
+	: BlockImpl(plugin, symbol, false, parent, srate)
+{
+	const Ingen::URIs& uris = bufs.uris();
+	_ports = new Raul::Array<PortImpl*>(1);
+
+	_notify_port = new OutputPort(
+		bufs, this, Raul::Symbol("notify"), 0, 1,
+		PortType::ATOM, uris.atom_Sequence, Raul::Atom(), 1024);
+	_notify_port->set_property(uris.lv2_name, bufs.forge().alloc("Notify"));
+	_notify_port->set_property(uris.atom_supports,
+	                           bufs.forge().make_urid(uris.time_Position));
+	_ports->at(0) = _notify_port;
+}
+
+void
+TimeNode::process(ProcessContext& context)
+{
+	BlockImpl::pre_process(context);
+
+	BufferRef          buf = _notify_port->buffer(0);
+	LV2_Atom_Sequence* seq = (LV2_Atom_Sequence*)buf->atom();
+
+	// Initialise output to the empty sequence
+	seq->atom.type = _notify_port->bufs().uris().atom_Sequence;
+	seq->atom.size = sizeof(LV2_Atom_Sequence_Body);
+
+	// Ask the driver to append any time events for this cycle
+	context.engine().driver()->append_time_events(
+		context, *_notify_port->buffer(0));
+
+	BlockImpl::post_process(context);
+}
+
+} // namespace Internals
+} // namespace Server
+} // namespace Ingen
+
diff --git a/src/server/internals/Time.hpp b/src/server/internals/Time.hpp
new file mode 100644
index 00000000..7efe5d6a
--- /dev/null
+++ b/src/server/internals/Time.hpp
@@ -0,0 +1,59 @@
+/*
+  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_INTERNALS_TIME_HPP
+#define INGEN_INTERNALS_TIME_HPP
+
+#include "BlockImpl.hpp"
+
+namespace Ingen {
+namespace Server {
+
+class InputPort;
+class OutputPort;
+class InternalPlugin;
+
+namespace Internals {
+
+/** Time information block.
+ *
+ * This sends messages whenever the transport speed or tempo changes.
+ *
+ * \ingroup engine
+ */
+class TimeNode : public BlockImpl
+{
+public:
+	TimeNode(InternalPlugin*     plugin,
+	         BufferFactory&      bufs,
+	         const Raul::Symbol& symbol,
+	         bool                polyphonic,
+	         GraphImpl*          parent,
+	         SampleRate          srate);
+
+	void process(ProcessContext& context);
+
+	static InternalPlugin* internal_plugin(URIs& uris);
+
+private:
+	OutputPort* _notify_port;
+};
+
+} // namespace Server
+} // namespace Ingen
+} // namespace Internals
+
+#endif // INGEN_INTERNALS_TIME_HPP