This is an update to the surface ArdourFeedback class that is needed to support the new event loop integration method. The various session event callbacks cannot be queued in the surface event loop because that would create a delay between the time such events are fired and the time for writing to clients arrive, due to lws_service() blocking while it waits to read. To solve this issue a helper AbstractUI is created for catching events as soon as possible and issuing a call to lws_cancel_service(). See WebsocketsServer::glib_idle_callback()
110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
/*
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* Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2009-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009 David Robillard <d@drobilla.net>
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* Copyright (C) 2013-2016 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2015 Johannes Mueller <github@johannes-mueller.org>
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* Copyright (C) 2016-2018 Len Ovens <len@ovenwerks.net>
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* Copyright (C) 2016 Ben Loftis <ben@harrisonconsoles.com>
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* Copyright (C) 2020 Luciano Iam <oss@lucianoiam.com>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _ardour_surface_websockets_h_
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#define _ardour_surface_websockets_h_
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#define ABSTRACT_UI_EXPORTS
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#include "pbd/abstract_ui.h"
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#include "ardour/plugin.h"
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#include "control_protocol/control_protocol.h"
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#include "component.h"
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#include "dispatcher.h"
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#include "feedback.h"
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#include "transport.h"
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#include "server.h"
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#include "mixer.h"
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namespace ArdourSurface {
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const char * const surface_name = "WebSockets Server (Experimental)";
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const char * const surface_id = "uri://ardour.org/surfaces/ardour_websockets:0";
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struct ArdourWebsocketsUIRequest : public BaseUI::BaseRequestObject {
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public:
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ArdourWebsocketsUIRequest () {}
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~ArdourWebsocketsUIRequest () {}
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};
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class ArdourWebsockets : public ARDOUR::ControlProtocol,
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public AbstractUI<ArdourWebsocketsUIRequest>
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{
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public:
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ArdourWebsockets (ARDOUR::Session&);
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virtual ~ArdourWebsockets ();
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static void* request_factory (uint32_t);
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int set_active (bool);
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ARDOUR::Session& ardour_session ()
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{
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return *session;
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}
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ArdourMixer& mixer_component ()
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{
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return _mixer;
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}
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ArdourTransport& transport_component ()
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{
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return _transport;
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}
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WebsocketsServer& server_component ()
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{
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return _server;
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}
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WebsocketsDispatcher& dispatcher_component ()
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{
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return _dispatcher;
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}
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/* ControlProtocol */
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void stripable_selection_changed () {}
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protected:
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/* BaseUI */
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void thread_init ();
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/* AbstractUI */
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void do_request (ArdourWebsocketsUIRequest*);
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private:
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ArdourMixer _mixer;
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ArdourTransport _transport;
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WebsocketsServer _server;
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ArdourFeedback _feedback;
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WebsocketsDispatcher _dispatcher;
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std::vector<SurfaceComponent*> _components;
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int start ();
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int stop ();
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};
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} // namespace ArdourSurface
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#endif // _ardour_surface_websockets_h_
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