From 5e26deeb6ccfbc4579568828fabe34b8285094bf Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 13 Jul 2012 21:13:35 +0000
Subject: add missing files

git-svn-id: svn://localhost/ardour2/branches/3.0@13039 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/automation_watch.cc | 146 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 libs/ardour/automation_watch.cc

(limited to 'libs/ardour/automation_watch.cc')

diff --git a/libs/ardour/automation_watch.cc b/libs/ardour/automation_watch.cc
new file mode 100644
index 0000000000..670636e977
--- /dev/null
+++ b/libs/ardour/automation_watch.cc
@@ -0,0 +1,146 @@
+/*
+    Copyright (C) 2012 Paul Davis
+
+    This program 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.
+
+    This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <iostream>
+
+#include "pbd/compose.h"
+
+#include "ardour/automation_control.h"
+#include "ardour/automation_watch.h"
+#include "ardour/debug.h"
+#include "ardour/session.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+using std::cerr;
+using std::endl;
+
+AutomationWatch* AutomationWatch::_instance = 0;
+
+AutomationWatch&
+AutomationWatch::instance ()
+{
+	if (_instance == 0) {
+		_instance = new AutomationWatch;
+	}
+	return *_instance;
+}
+
+AutomationWatch::AutomationWatch ()
+	: _thread (0)
+	, _run_thread (false)
+{
+	
+}
+
+AutomationWatch::~AutomationWatch ()
+{
+	if (_thread) {
+		_run_thread = false;
+		_thread->join ();
+		_thread = 0;
+	}
+
+	Glib::Mutex::Lock lm (automation_watch_lock);
+	automation_watches.clear ();
+}
+
+void
+AutomationWatch::add_automation_watch (boost::shared_ptr<AutomationControl> ac)
+{
+	Glib::Mutex::Lock lm (automation_watch_lock);
+	DEBUG_TRACE (DEBUG::Automation, string_compose ("now watching control %1 for automation\n", ac->name()));
+	automation_watches.push_back (ac);
+
+	/* we can't store shared_ptr<Destructible> in connections because it
+	 * creates reference cycles. we don't need to make the weak_ptr<>
+	 * explicit here, but it helps to remind us what is going on.
+	 */
+	
+	boost::weak_ptr<AutomationControl> wac (ac);
+	ac->DropReferences.connect_same_thread (*this, boost::bind (&AutomationWatch::remove_weak_automation_watch, this, wac));
+}
+
+void
+AutomationWatch::remove_weak_automation_watch (boost::weak_ptr<AutomationControl> wac)
+{
+	boost::shared_ptr<AutomationControl> ac = wac.lock();
+
+	if (!ac) {
+		return;
+	}
+
+	remove_automation_watch (ac);
+}
+
+void
+AutomationWatch::remove_automation_watch (boost::shared_ptr<AutomationControl> ac)
+{
+	Glib::Mutex::Lock lm (automation_watch_lock);
+	DEBUG_TRACE (DEBUG::Automation, string_compose ("remove control %1 from automation watch\n", ac->name()));
+	automation_watches.remove (ac);
+}
+
+gint
+AutomationWatch::timer ()
+{
+	if (!_session || !_session->transport_rolling()) {
+		return TRUE;
+	}
+
+	{
+		Glib::Mutex::Lock lm (automation_watch_lock);
+		
+		framepos_t time = _session->audible_frame ();
+
+		for (AutomationWatches::iterator aw = automation_watches.begin(); aw != automation_watches.end(); ++aw) {
+			(*aw)->list()->add (time, (*aw)->user_double(), true);
+		}
+	}
+
+	return TRUE;
+}
+
+void
+AutomationWatch::thread ()
+{
+	while (_run_thread) {
+		usleep (100000); // Config->get_automation_interval() * 10);
+		timer ();
+	}
+}
+
+void
+AutomationWatch::set_session (Session* s)
+{
+	if (_thread) {
+		_run_thread = false;
+		_thread->join ();
+		_thread = 0;
+	}
+
+	SessionHandlePtr::set_session (s);
+
+	if (_session) {
+		_run_thread = true;
+		_thread = Glib::Thread::create (boost::bind (&AutomationWatch::thread, this),
+						500000, true, true, Glib::THREAD_PRIORITY_NORMAL);
+		
+	}
+}
-- 
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