2 Copyright (C) 2010 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #ifndef __ardour_graph_h__
22 #define __ardour_graph_h__
29 #include <boost/shared_ptr.hpp>
33 #include "pbd/semutils.h"
35 #include "ardour/libardour_visibility.h"
36 #include "ardour/types.h"
37 #include "ardour/audio_backend.h"
38 #include "ardour/session_handle.h"
50 typedef boost::shared_ptr<GraphNode> node_ptr_t;
52 typedef std::list< node_ptr_t > node_list_t;
53 typedef std::set< node_ptr_t > node_set_t;
55 class LIBARDOUR_API Graph : public SessionHandleRef
58 Graph (Session & session);
60 void trigger (GraphNode * n);
61 void rechain (boost::shared_ptr<RouteList>, GraphEdges const &);
63 void dump (int chain);
68 int process_routes (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool& need_butler);
70 int routes_no_roll (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool non_rt_pending );
72 void process_one_route (Route * route);
74 void clear_other_chain ();
76 bool in_process_thread () const;
79 virtual void session_going_away ();
82 volatile bool _threads_active;
84 void reset_thread_list ();
91 node_list_t _nodes_rt[2];
93 node_list_t _init_trigger_list[2];
95 std::vector<GraphNode *> _trigger_queue;
96 pthread_mutex_t _trigger_mutex;
98 PBD::Semaphore _execution_sem;
100 /** Signalled to start a run of the graph for a process callback */
101 PBD::Semaphore _callback_start_sem;
102 PBD::Semaphore _callback_done_sem;
104 /** The number of processing threads that are asleep */
105 volatile gint _execution_tokens;
106 /** The number of unprocessed nodes that do not feed any other node; updated during processing */
107 volatile gint _finished_refcount;
108 /** The initial number of nodes that do not feed any other node (for each chain) */
109 volatile gint _init_finished_refcount[2];
114 Glib::Threads::Mutex _swap_mutex;
115 Glib::Threads::Cond _cleanup_cond;
116 volatile int _current_chain;
117 volatile int _pending_chain;
118 volatile int _setup_chain;
121 pframes_t _process_nframes;
122 samplepos_t _process_start_sample;
123 samplepos_t _process_end_sample;
124 bool _process_can_record;
125 bool _process_non_rt_pending;
127 bool _process_noroll;
129 bool _process_need_butler;
131 // enginer / thread connection
132 PBD::ScopedConnectionList engine_connections;
133 void engine_stopped ();
138 #endif /* __ardour_graph_h__ */