134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
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/*
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DUMMY-PLAYER-SERVICE.hpp - service implementing a dummy test player
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Copyright (C) Lumiera.org
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2009, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file notification-service.hpp
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** A public service provided by the GUI, implementing the gui::GuiNotification facade interface.
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** The purpose of this service is to push state update and notification of events from the lower
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** layers into the Lumiera GUI. Typically, this happens asynchronously and triggered by events
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** within the lower layers.
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**
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** This service is the implementation of a layer separation facade interface. Clients should use
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** gui::GuiNotification#facade to access this service. This header defines the interface used
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** to \em provide this service, not to access it.
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**
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** @see gui::GuiFacade
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** @see guifacade.cpp starting this service
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*/
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#ifndef PROC_DUMMYPLAYER_SERVICE_H
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#define PROC_DUMMYPLAYER_SERVICE_H
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#include "include/dummy-player-facade.h"
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#include "common/instancehandle.hpp"
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#include "lib/singleton-ref.hpp"
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#include <string>
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namespace proc {
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namespace play {
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using std::string;
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using lumiera::Subsys;
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class ProcessImpl
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: public DummyPlayer::Process
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{
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void pause(bool doPlay);
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void* const getFrame();
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uint fps_;
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bool play_;
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public:
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ProcessImpl() : fps_(0), play_(false) {}
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/* Implementation-level API to be used By DummyPlayerService */
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/** activate a playback process
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* with given specification */
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void setRate (uint fps);
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bool isActive () { return fps_ != 0; }
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bool isPlaying() { return play_; }
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};
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/******************************************************
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* Actual implementation of the GuiNotification service
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* within the Lumiera GTK GUI. Creating an instance of
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* this class automatically registers the interface
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* with the Lumiera Interface/Plugin system and creates
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* a forwarding proxy within the application core to
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* route calls through this interface.
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*
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* @todo the ctor of this class should take references
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* to any internal service providers within the
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* GUI which are needed to implement the service.
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*/
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class DummyPlayerService
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: public DummyPlayer
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{
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/* === Implementation of the Facade Interface === */
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Process& start();
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/** for now we use an single inline Process...
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* @todo actually implement multiple independent Playback processes!
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* @todo I am aware holding this object inline may cause a segfault at shutdown!
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*/
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ProcessImpl theProcess_;
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string error_;
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Subsys::SigTerm notifyTermination_;
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/* === Interface Lifecycle === */
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typedef lumiera::InstanceHandle< LUMIERA_INTERFACE_INAME(lumieraorg_DummyPlayer, 0)
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, DummyPlayer
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> ServiceInstanceHandle;
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lib::SingletonRef<DummyPlayer> implInstance_;
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ServiceInstanceHandle serviceInstance_;
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public:
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DummyPlayerService(Subsys::SigTerm terminationHandle);
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~DummyPlayerService() { notifyTermination_(&error_); }
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};
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} // namespace play
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} // namespace proc
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#endif
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