2 Copyright (C) 2002-2004 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #ifndef __ardour_audioengine_h__
22 #define __ardour_audioengine_h__
30 #include <sigc++/signal.h>
32 #include <glibmm/thread.h>
34 #include <ardour/ardour.h>
35 #include <jack/jack.h>
36 #include <jack/transport.h>
37 #include <ardour/types.h>
44 class AudioEngine : public sigc::trackable
47 AudioEngine (std::string client_name);
48 virtual ~AudioEngine ();
50 jack_client_t* jack() const { return _jack; }
51 bool connected() const { return _jack != 0; }
53 std::string client_name() const { return jack_client_name; }
55 int reconnect_to_jack ();
56 int disconnect_from_jack();
58 bool will_reconnect_at_halt ();
59 void set_reconnect_at_halt (bool);
63 bool running() const { return _running; }
65 Glib::Mutex& process_lock() { return _process_lock; }
67 jack_nframes_t frame_rate();
68 jack_nframes_t frames_per_cycle();
70 int usecs_per_cycle () const { return _usecs_per_cycle; }
72 jack_nframes_t frames_since_cycle_start () {
73 if (!_running || !_jack) return 0;
74 return jack_frames_since_cycle_start (_jack);
76 jack_nframes_t frame_time () {
77 if (!_running || !_jack) return 0;
78 return jack_frame_time (_jack);
81 jack_nframes_t transport_frame () const {
82 if (!_running || !_jack) return 0;
83 return jack_get_current_transport_frame (_jack);
86 int request_buffer_size (jack_nframes_t);
88 jack_nframes_t set_monitor_check_interval (jack_nframes_t);
90 float get_cpu_load() {
91 if (!_running || !_jack) return 0;
92 return jack_cpu_load (_jack);
95 void set_session (Session *);
96 void remove_session ();
98 class PortRegistrationFailure : public std::exception {
100 virtual const char *what() const throw() { return "failed port registration"; }
103 class NoBackendAvailable : public std::exception {
105 virtual const char *what() const throw() { return "could not connect to engine backend"; }
108 Port *register_input_port (DataType type, const std::string& portname);
109 Port *register_output_port (DataType type, const std::string& portname);
110 int unregister_port (Port *);
112 int connect (const std::string& source, const std::string& destination);
113 int disconnect (const std::string& source, const std::string& destination);
114 int disconnect (Port *);
116 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
118 uint32_t n_physical_outputs () const;
119 uint32_t n_physical_inputs () const;
121 std::string get_nth_physical_output (uint32_t n) {
122 return get_nth_physical (n, JackPortIsInput);
125 std::string get_nth_physical_input (uint32_t n) {
126 return get_nth_physical (n, JackPortIsOutput);
129 jack_nframes_t get_port_total_latency (const Port&);
130 void update_total_latencies ();
132 /* the caller may not delete the object pointed to by
136 Port *get_port_by_name (const std::string& name, bool keep = true);
138 enum TransportState {
139 TransportStopped = JackTransportStopped,
140 TransportRolling = JackTransportRolling,
141 TransportLooping = JackTransportLooping,
142 TransportStarting = JackTransportStarting
145 void transport_start ();
146 void transport_stop ();
147 void transport_locate (jack_nframes_t);
148 TransportState transport_state ();
150 int reset_timebase ();
152 /* start/stop freewheeling */
154 int freewheel (bool onoff);
155 bool freewheeling() const { return _freewheeling; }
157 /* this signal is sent for every process() cycle while freewheeling.
158 the regular process() call to session->process() is not made.
161 sigc::signal<int,jack_nframes_t> Freewheel;
163 sigc::signal<void> Xrun;
165 /* this signal is if JACK notifies us of a graph order event */
167 sigc::signal<void> GraphReordered;
169 /* this signal is emitted if the sample rate changes */
171 sigc::signal<void,jack_nframes_t> SampleRateChanged;
173 /* this signal is sent if JACK ever disconnects us */
175 sigc::signal<void> Halted;
177 /* these two are emitted when the engine itself is
181 sigc::signal<void> Running;
182 sigc::signal<void> Stopped;
184 std::string make_port_name_relative (std::string);
185 std::string make_port_name_non_relative (std::string);
188 ARDOUR::Session *session;
189 jack_client_t *_jack;
190 std::string jack_client_name;
191 Glib::Mutex port_lock;
192 Glib::Mutex _process_lock;
193 Glib::Mutex session_remove_lock;
194 Glib::Cond session_removed;
195 bool session_remove_pending;
198 jack_nframes_t _buffer_size;
199 jack_nframes_t _frame_rate;
200 jack_nframes_t monitor_check_interval;
201 jack_nframes_t last_monitor_check;
202 jack_nframes_t _processed_frames;
204 bool _freewheel_thread_registered;
205 sigc::slot<int,jack_nframes_t> freewheel_action;
206 bool reconnect_on_halt;
207 int _usecs_per_cycle;
209 typedef std::set<Port*> Ports;
212 int process_callback (jack_nframes_t nframes);
213 void remove_all_ports ();
215 typedef std::pair<std::string,std::string> PortConnection;
216 typedef std::list<PortConnection> PortConnections;
218 PortConnections port_connections;
219 void remove_connections_for (Port*);
221 std::string get_nth_physical (uint32_t which, int flags);
223 static int _xrun_callback (void *arg);
224 static int _graph_order_callback (void *arg);
225 static int _process_callback (jack_nframes_t nframes, void *arg);
226 static int _sample_rate_callback (jack_nframes_t nframes, void *arg);
227 static int _bufsize_callback (jack_nframes_t nframes, void *arg);
228 static void _jack_timebase_callback (jack_transport_state_t, jack_nframes_t, jack_position_t*, int, void*);
229 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
230 static void _freewheel_callback (int , void *arg);
232 void jack_timebase_callback (jack_transport_state_t, jack_nframes_t, jack_position_t*, int);
233 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
234 int jack_bufsize_callback (jack_nframes_t);
235 int jack_sample_rate_callback (jack_nframes_t);
237 static void halted (void *);
239 int connect_to_jack (std::string client_name);
241 void meter_thread ();
242 void start_metering_thread ();
243 Glib::Thread* m_meter_thread;
244 mutable gint m_meter_exit;
247 } // namespace ARDOUR
249 #endif /* __ardour_audioengine_h__ */