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>
47 class AudioEngine : public sigc::trackable
50 typedef std::set<Port*> Ports;
52 AudioEngine (std::string client_name);
53 virtual ~AudioEngine ();
55 jack_client_t* jack() const;
56 bool connected() const { return _jack != 0; }
58 bool is_realtime () const;
60 std::string client_name() const { return jack_client_name; }
62 int reconnect_to_jack ();
63 int disconnect_from_jack();
65 bool will_reconnect_at_halt ();
66 void set_reconnect_at_halt (bool);
68 int stop (bool forever = false);
70 bool running() const { return _running; }
72 Glib::Mutex& process_lock() { return _process_lock; }
74 nframes_t frame_rate();
75 nframes_t frames_per_cycle();
77 int usecs_per_cycle () const { return _usecs_per_cycle; }
79 bool get_sync_offset (nframes_t& offset) const;
81 nframes_t frames_since_cycle_start () {
82 if (!_running || !_jack) return 0;
83 return jack_frames_since_cycle_start (_jack);
85 nframes_t frame_time () {
86 if (!_running || !_jack) return 0;
87 return jack_frame_time (_jack);
90 nframes_t transport_frame () const {
91 if (!_running || !_jack) return 0;
92 return jack_get_current_transport_frame (_jack);
95 int request_buffer_size (nframes_t);
97 nframes_t set_monitor_check_interval (nframes_t);
99 float get_cpu_load() {
100 if (!_running || !_jack) return 0;
101 return jack_cpu_load (_jack);
104 void set_session (Session *);
105 void remove_session ();
107 class PortRegistrationFailure : public std::exception {
109 PortRegistrationFailure (const char* why = "") {
112 virtual const char *what() const throw() { return reason; }
118 class NoBackendAvailable : public std::exception {
120 virtual const char *what() const throw() { return "could not connect to engine backend"; }
123 Port *register_input_port (DataType, const std::string& portname);
124 Port *register_output_port (DataType, const std::string& portname);
125 int unregister_port (Port &);
127 int connect (const std::string& source, const std::string& destination);
128 int disconnect (const std::string& source, const std::string& destination);
129 int disconnect (Port &);
131 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
133 bool can_request_hardware_monitoring ();
135 uint32_t n_physical_outputs (DataType type) const;
136 uint32_t n_physical_inputs (DataType type) const;
138 void get_physical_outputs (DataType type, std::vector<std::string>&);
139 void get_physical_inputs (DataType type, std::vector<std::string>&);
141 std::string get_nth_physical_output (DataType type, uint32_t n) {
142 return get_nth_physical (type, n, JackPortIsInput);
145 std::string get_nth_physical_input (DataType type, uint32_t n) {
146 return get_nth_physical (type, n, JackPortIsOutput);
149 void update_total_latencies ();
150 void update_total_latency (const Port&);
152 Port *get_port_by_name (const std::string &);
153 Port *get_port_by_name_locked (const std::string &);
155 enum TransportState {
156 TransportStopped = JackTransportStopped,
157 TransportRolling = JackTransportRolling,
158 TransportLooping = JackTransportLooping,
159 TransportStarting = JackTransportStarting
162 void transport_start ();
163 void transport_stop ();
164 void transport_locate (nframes_t);
165 TransportState transport_state ();
167 int reset_timebase ();
169 /* start/stop freewheeling */
171 int freewheel (bool onoff);
172 bool freewheeling() const { return _freewheeling; }
174 /* this signal is sent for every process() cycle while freewheeling.
175 the regular process() call to session->process() is not made.
178 sigc::signal<int,nframes_t> Freewheel;
180 sigc::signal<void> Xrun;
182 /* this signal is if JACK notifies us of a graph order event */
184 sigc::signal<void> GraphReordered;
186 /* this signal is emitted if the sample rate changes */
188 sigc::signal<void,nframes_t> SampleRateChanged;
190 /* this signal is sent if JACK ever disconnects us */
192 sigc::signal<void> Halted;
194 /* these two are emitted when the engine itself is
198 sigc::signal<void> Running;
199 sigc::signal<void> Stopped;
201 std::string make_port_name_relative (std::string);
202 std::string make_port_name_non_relative (std::string);
205 ARDOUR::Session* session;
206 jack_client_t* _jack;
207 std::string jack_client_name;
208 Glib::Mutex _process_lock;
209 Glib::Cond session_removed;
210 bool session_remove_pending;
213 nframes_t _buffer_size;
214 nframes_t _frame_rate;
215 /// number of frames between each check for changes in monitor input
216 nframes_t monitor_check_interval;
217 /// time of the last monitor check in frames
218 nframes_t last_monitor_check;
219 /// the number of frames processed since start() was called
220 nframes_t _processed_frames;
222 bool _freewheel_pending;
223 bool _freewheel_thread_registered;
224 sigc::slot<int,nframes_t> freewheel_action;
225 bool reconnect_on_halt;
226 int _usecs_per_cycle;
228 SerializedRCUManager<Ports> ports;
230 Port *register_port (DataType type, const std::string& portname, bool input);
232 int process_callback (nframes_t nframes);
233 void remove_all_ports ();
235 typedef std::pair<std::string,std::string> PortConnection;
236 typedef std::list<PortConnection> PortConnections;
238 PortConnections port_connections;
239 void remove_connections_for (Port&);
241 std::string get_nth_physical (DataType type, uint32_t n, int flags);
243 void port_registration_failure (const std::string& portname);
245 static int _xrun_callback (void *arg);
246 static int _graph_order_callback (void *arg);
247 static int _process_callback (nframes_t nframes, void *arg);
248 static int _sample_rate_callback (nframes_t nframes, void *arg);
249 static int _bufsize_callback (nframes_t nframes, void *arg);
250 static void _jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int, void*);
251 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
252 static void _freewheel_callback (int , void *arg);
254 void jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int);
255 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
256 int jack_bufsize_callback (nframes_t);
257 int jack_sample_rate_callback (nframes_t);
259 static void halted (void *);
261 int connect_to_jack (std::string client_name);
263 void meter_thread ();
264 void start_metering_thread ();
265 void stop_metering_thread ();
267 Glib::Thread* m_meter_thread;
268 static gint m_meter_exit;
271 } // namespace ARDOUR
273 #endif /* __ardour_audioengine_h__ */