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.
20 #ifndef __ardour_audioengine_h__
21 #define __ardour_audioengine_h__
29 #include <sigc++/signal.h>
31 #include <glibmm/thread.h>
35 #include <ardour/ardour.h>
36 #include <jack/jack.h>
37 #include <jack/transport.h>
38 #include <ardour/types.h>
39 #include <ardour/data_type.h>
46 class AudioEngine : public sigc::trackable
49 typedef std::set<Port*> Ports;
51 AudioEngine (std::string client_name);
52 virtual ~AudioEngine ();
54 jack_client_t* jack() const { return _jack; }
55 bool connected() const { return _jack != 0; }
57 bool is_realtime () const;
59 std::string client_name() const { return jack_client_name; }
61 int reconnect_to_jack ();
62 int disconnect_from_jack();
64 bool will_reconnect_at_halt ();
65 void set_reconnect_at_halt (bool);
67 int stop (bool forever = false);
69 bool running() const { return _running; }
71 Glib::Mutex& process_lock() { return _process_lock; }
73 nframes_t frame_rate();
74 nframes_t frames_per_cycle();
76 int usecs_per_cycle () const { return _usecs_per_cycle; }
78 bool get_sync_offset (nframes_t& offset) const;
80 nframes_t frames_since_cycle_start () {
81 if (!_running || !_jack) return 0;
82 return jack_frames_since_cycle_start (_jack);
84 nframes_t frame_time () {
85 if (!_running || !_jack) return 0;
86 return jack_frame_time (_jack);
89 nframes_t transport_frame () const {
90 if (!_running || !_jack) return 0;
91 return jack_get_current_transport_frame (_jack);
94 int request_buffer_size (nframes_t);
96 nframes_t set_monitor_check_interval (nframes_t);
98 float get_cpu_load() {
99 if (!_running || !_jack) return 0;
100 return jack_cpu_load (_jack);
103 void set_session (Session *);
104 void remove_session ();
106 class PortRegistrationFailure : public std::exception {
108 virtual const char *what() const throw() { return "failed port registration"; }
111 class NoBackendAvailable : public std::exception {
113 virtual const char *what() const throw() { return "could not connect to engine backend"; }
116 Port *register_input_port (DataType type, const std::string& portname);
117 Port *register_output_port (DataType type, const std::string& portname);
118 int unregister_port (Port &);
120 int connect (const std::string& source, const std::string& destination);
121 int disconnect (const std::string& source, const std::string& destination);
122 int disconnect (Port &);
124 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
126 uint32_t n_physical_outputs () const;
127 uint32_t n_physical_inputs () const;
129 void get_physical_outputs (std::vector<std::string>&);
130 void get_physical_inputs (std::vector<std::string>&);
132 std::string get_nth_physical_output (DataType type, uint32_t n) {
133 return get_nth_physical (type, n, JackPortIsInput);
136 std::string get_nth_physical_input (DataType type, uint32_t n) {
137 return get_nth_physical (type, n, JackPortIsOutput);
140 nframes_t get_port_total_latency (const Port&);
141 void update_total_latencies ();
142 void update_total_latency (const Port&);
144 /** Caller may not delete the object pointed to by the return value
146 Port *get_port_by_name (const std::string& name, bool keep = true);
148 enum TransportState {
149 TransportStopped = JackTransportStopped,
150 TransportRolling = JackTransportRolling,
151 TransportLooping = JackTransportLooping,
152 TransportStarting = JackTransportStarting
155 void transport_start ();
156 void transport_stop ();
157 void transport_locate (nframes_t);
158 TransportState transport_state ();
160 int reset_timebase ();
162 /* start/stop freewheeling */
164 int freewheel (bool onoff);
165 bool freewheeling() const { return _freewheeling; }
167 /* this signal is sent for every process() cycle while freewheeling.
168 the regular process() call to session->process() is not made.
171 sigc::signal<int,nframes_t> Freewheel;
173 sigc::signal<void> Xrun;
175 /* this signal is if JACK notifies us of a graph order event */
177 sigc::signal<void> GraphReordered;
179 /* this signal is emitted if the sample rate changes */
181 sigc::signal<void,nframes_t> SampleRateChanged;
183 /* this signal is sent if JACK ever disconnects us */
185 sigc::signal<void> Halted;
187 /* these two are emitted when the engine itself is
191 sigc::signal<void> Running;
192 sigc::signal<void> Stopped;
194 std::string make_port_name_relative (std::string);
195 std::string make_port_name_non_relative (std::string);
198 ARDOUR::Session *session;
199 jack_client_t *_jack;
200 std::string jack_client_name;
201 Glib::Mutex _process_lock;
202 Glib::Cond session_removed;
203 bool session_remove_pending;
206 nframes_t _buffer_size;
207 nframes_t _frame_rate;
208 /// number of frames between each check for changes in monitor input
209 nframes_t monitor_check_interval;
210 /// time of the last monitor check in frames
211 nframes_t last_monitor_check;
212 /// the number of frames processed since start() was called
213 nframes_t _processed_frames;
215 bool _freewheel_thread_registered;
216 sigc::slot<int,nframes_t> freewheel_action;
217 bool reconnect_on_halt;
218 int _usecs_per_cycle;
220 SerializedRCUManager<Ports> ports;
222 int process_callback (nframes_t nframes);
223 void remove_all_ports ();
225 typedef std::pair<std::string,std::string> PortConnection;
226 typedef std::list<PortConnection> PortConnections;
228 PortConnections port_connections;
229 void remove_connections_for (Port&);
231 std::string get_nth_physical (DataType type, uint32_t n, int flags);
233 static int _xrun_callback (void *arg);
234 static int _graph_order_callback (void *arg);
235 static int _process_callback (nframes_t nframes, void *arg);
236 static int _sample_rate_callback (nframes_t nframes, void *arg);
237 static int _bufsize_callback (nframes_t nframes, void *arg);
238 static void _jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int, void*);
239 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
240 static void _freewheel_callback (int , void *arg);
242 void jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int);
243 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
244 int jack_bufsize_callback (nframes_t);
245 int jack_sample_rate_callback (nframes_t);
247 static void halted (void *);
249 int connect_to_jack (std::string client_name);
251 void meter_thread ();
252 void start_metering_thread ();
253 void stop_metering_thread ();
255 Glib::Thread* m_meter_thread;
256 static gint m_meter_exit;
259 } // namespace ARDOUR
261 #endif /* __ardour_audioengine_h__ */