adjustments to build nascent push2 surface support

libs/surfaces/push2/interface.cc

@@ -0,0 +1,100 @@
+/*
+	Copyright (C) 2006,2007 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 <stdexcept>
+
+#include "pbd/error.h"
+
+#include "ardour/rc_configuration.h"
+
+#include "control_protocol/control_protocol.h"
+#include "push2.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+using namespace std;
+using namespace ArdourSurface;
+
+static ControlProtocol*
+new_push2 (ControlProtocolDescriptor*, Session* s)
+{
+	Push2 * p2 = 0;
+
+	try {
+		p2 = new Push2 (*s);
+		/* do not set active here - wait for set_state() */
+	}
+	catch (exception & e) {
+		error << "Error instantiating Push2 support: " << e.what() << endmsg;
+		delete p2;
+		p2 = 0;
+	}
+
+	return p2;
+}
+
+static void
+delete_push2 (ControlProtocolDescriptor*, ControlProtocol* cp)
+{
+	try
+	{
+		delete cp;
+	}
+	catch ( exception & e )
+	{
+		cout << "Exception caught trying to finalize Push2 support: " << e.what() << endl;
+	}
+}
+
+/**
+	This is called on startup to check whether the lib should be loaded.
+
+	So anything that can be changed in the UI should not be used here to
+	prevent loading of the lib.
+*/
+static bool
+probe_push2 (ControlProtocolDescriptor*)
+{
+	return Push2::probe();
+}
+
+static void*
+push2_request_buffer_factory (uint32_t num_requests)
+{
+	return Push2::request_factory (num_requests);
+}
+
+// Field names commented out by JE - 06-01-2010
+static ControlProtocolDescriptor mackie_descriptor = {
+	/*name :              */   "Ableton Push2",
+	/*id :                */   "uri://ardour.org/surfaces/push2:0",
+	/*ptr :               */   0,
+	/*module :            */   0,
+	/*mandatory :         */   0,
+	// actually, the surface does support feedback, but all this
+	// flag does is show a submenu on the UI, which is useless for the mackie
+	// because feedback is always on. In any case, who'd want to use the
+	// mcu without the motorised sliders doing their thing?
+	/*supports_feedback : */   false,
+	/*probe :             */   probe_push2,
+	/*initialize :        */   new_push2,
+	/*destroy :           */   delete_push2,
+	/*request_buffer_factory */ push2_request_buffer_factory
+};
+
+extern "C" ARDOURSURFACE_API ControlProtocolDescriptor* protocol_descriptor () { return &mackie_descriptor; }