148 lines
4.0 KiB
C++
148 lines
4.0 KiB
C++
/*
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* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2014 David Robillard <d@drobilla.net>
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* Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2013 Tim Mayberry <mojofunk@gmail.com>
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* Copyright (C) 2015-2019 Robin Gareus <robin@gareus.org>
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*
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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_graph_h__
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#define __ardour_graph_h__
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#include <list>
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#include <set>
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#include <string>
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#include <vector>
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#include <boost/shared_ptr.hpp>
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#include "pbd/mpmc_queue.h"
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#include "pbd/semutils.h"
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#include "pbd/g_atomic_compat.h"
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#include "ardour/audio_backend.h"
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#include "ardour/libardour_visibility.h"
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#include "ardour/session_handle.h"
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#include "ardour/types.h"
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namespace ARDOUR
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{
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class GraphNode;
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class Graph;
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class Route;
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class Session;
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class GraphEdges;
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typedef boost::shared_ptr<GraphNode> node_ptr_t;
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typedef std::list<node_ptr_t> node_list_t;
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typedef std::set<node_ptr_t> node_set_t;
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class LIBARDOUR_API Graph : public SessionHandleRef
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{
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public:
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Graph (Session& session);
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void trigger (GraphNode* n);
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void rechain (boost::shared_ptr<RouteList>, GraphEdges const&);
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bool plot (std::string const& file_name) const;
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void plot (int chain);
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void reached_terminal_node ();
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void helper_thread ();
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int process_routes (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool& need_butler);
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int routes_no_roll (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool non_rt_pending);
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void process_one_route (Route* route);
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void clear_other_chain ();
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void swap_process_chain ();
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bool in_process_thread () const;
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protected:
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virtual void session_going_away ();
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private:
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void reset_thread_list ();
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void drop_threads ();
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void run_one ();
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void main_thread ();
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void prep ();
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void dump (int chain) const;
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node_list_t _nodes_rt[2];
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node_list_t _init_trigger_list[2];
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PBD::MPMCQueue<GraphNode*> _trigger_queue; ///< nodes that can be processed
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GATOMIC_QUAL guint _trigger_queue_size; ///< number of entries in trigger-queue
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/** Start worker threads */
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PBD::Semaphore _execution_sem;
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/** The number of processing threads that are asleep */
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GATOMIC_QUAL guint _idle_thread_cnt;
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/** Signalled to start a run of the graph for a process callback */
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PBD::Semaphore _callback_start_sem;
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PBD::Semaphore _callback_done_sem;
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/** The number of unprocessed nodes that do not feed any other node; updated during processing */
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GATOMIC_QUAL guint _terminal_refcnt;
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/** The initial number of nodes that do not feed any other node (for each chain) */
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guint _n_terminal_nodes[2];
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bool _graph_empty;
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/* number of background worker threads >= 0 */
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GATOMIC_QUAL guint _n_workers;
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/* flag to terminate background threads */
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GATOMIC_QUAL gint _terminate;
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/* chain swapping */
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Glib::Threads::Cond _cleanup_cond;
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mutable Glib::Threads::Mutex _swap_mutex;
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GATOMIC_QUAL gint _current_chain;
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GATOMIC_QUAL gint _pending_chain;
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GATOMIC_QUAL gint _setup_chain;
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/* parameter caches */
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pframes_t _process_nframes;
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samplepos_t _process_start_sample;
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samplepos_t _process_end_sample;
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bool _process_can_record;
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bool _process_non_rt_pending;
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bool _process_noroll;
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int _process_retval;
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bool _process_need_butler;
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/* engine / thread connection */
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PBD::ScopedConnectionList engine_connections;
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void engine_stopped ();
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};
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} // namespace
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#endif /* __ardour_graph_h__ */
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