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__
30 #include <glibmm/thread.h>
33 #include "pbd/signals.h"
35 #include "ardour/ardour.h"
36 #include <jack/jack.h>
37 #include <jack/transport.h>
39 #include "ardour/data_type.h"
40 #include "ardour/session_handle.h"
41 #include "ardour/types.h"
50 class AudioEngine : public SessionHandlePtr
53 typedef std::set<Port*> Ports;
55 AudioEngine (std::string client_name);
56 virtual ~AudioEngine ();
58 jack_client_t* jack() const;
59 bool connected() const { return _jack != 0; }
61 bool is_realtime () const;
63 std::string client_name() const { return jack_client_name; }
65 int reconnect_to_jack ();
66 int disconnect_from_jack();
68 bool will_reconnect_at_halt ();
69 void set_reconnect_at_halt (bool);
71 int stop (bool forever = false);
73 bool running() const { return _running; }
75 Glib::Mutex& process_lock() { return _process_lock; }
77 nframes_t frame_rate() const;
78 nframes_t frames_per_cycle() const;
80 size_t raw_buffer_size(DataType t);
82 int usecs_per_cycle () const { return _usecs_per_cycle; }
84 bool get_sync_offset (nframes_t& offset) const;
86 nframes_t frames_since_cycle_start () {
87 jack_client_t* _priv_jack = _jack;
88 if (!_running || !_priv_jack) return 0;
89 return jack_frames_since_cycle_start (_priv_jack);
91 nframes_t frame_time () {
92 jack_client_t* _priv_jack = _jack;
93 if (!_running || !_priv_jack) return 0;
94 return jack_frame_time (_priv_jack);
97 nframes_t frame_time_at_cycle_start () {
98 jack_client_t* _priv_jack = _jack;
99 if (!_running || !_priv_jack) return 0;
100 return jack_last_frame_time (_priv_jack);
103 nframes_t transport_frame () const {
104 const jack_client_t* _priv_jack = _jack;
105 if (!_running || !_priv_jack) return 0;
106 return jack_get_current_transport_frame (_priv_jack);
109 int request_buffer_size (nframes_t);
111 nframes_t set_monitor_check_interval (nframes_t);
112 nframes_t processed_frames() const { return _processed_frames; }
114 float get_cpu_load() {
115 jack_client_t* _priv_jack = _jack;
116 if (!_running || !_priv_jack) return 0;
117 return jack_cpu_load (_priv_jack);
120 void set_session (Session *);
121 void remove_session (); // not a replacement for SessionHandle::session_going_away()
123 class PortRegistrationFailure : public std::exception {
125 PortRegistrationFailure (const char* why = "") {
128 virtual const char *what() const throw() { return reason; }
134 class NoBackendAvailable : public std::exception {
136 virtual const char *what() const throw() { return "could not connect to engine backend"; }
139 Port *register_input_port (DataType, const std::string& portname);
140 Port *register_output_port (DataType, const std::string& portname);
141 int unregister_port (Port &);
143 void split_cycle (nframes_t offset);
145 int connect (const std::string& source, const std::string& destination);
146 int disconnect (const std::string& source, const std::string& destination);
147 int disconnect (Port &);
149 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
151 bool can_request_hardware_monitoring ();
153 uint32_t n_physical_outputs (DataType type) const;
154 uint32_t n_physical_inputs (DataType type) const;
156 void get_physical_outputs (DataType type, std::vector<std::string>&);
157 void get_physical_inputs (DataType type, std::vector<std::string>&);
159 std::string get_nth_physical_output (DataType type, uint32_t n) {
160 return get_nth_physical (type, n, JackPortIsInput);
163 std::string get_nth_physical_input (DataType type, uint32_t n) {
164 return get_nth_physical (type, n, JackPortIsOutput);
167 void update_total_latencies ();
168 void update_total_latency (const Port&);
170 Port *get_port_by_name (const std::string &);
171 Port *get_port_by_name_locked (const std::string &);
173 enum TransportState {
174 TransportStopped = JackTransportStopped,
175 TransportRolling = JackTransportRolling,
176 TransportLooping = JackTransportLooping,
177 TransportStarting = JackTransportStarting
180 void transport_start ();
181 void transport_stop ();
182 void transport_locate (nframes_t);
183 TransportState transport_state ();
185 int reset_timebase ();
187 /* start/stop freewheeling */
189 int freewheel (bool onoff);
190 bool freewheeling() const { return _freewheeling; }
192 /* this signal is sent for every process() cycle while freewheeling.
193 _ the regular process() call to session->process() is not made.
196 PBD::Signal1<int,nframes_t> Freewheel;
198 PBD::Signal0<void> Xrun;
200 /* this signal is if JACK notifies us of a graph order event */
202 PBD::Signal0<void> GraphReordered;
204 /* this signal is emitted if the sample rate changes */
206 PBD::Signal1<void,nframes_t> SampleRateChanged;
208 /* this signal is sent if JACK ever disconnects us */
210 PBD::Signal0<void> Halted;
212 /* these two are emitted when the engine itself is
216 PBD::Signal0<void> Running;
217 PBD::Signal0<void> Stopped;
219 /* this signal is emitted if a JACK port is registered or unregistered */
221 PBD::Signal0<void> PortRegisteredOrUnregistered;
223 std::string make_port_name_relative (std::string);
224 std::string make_port_name_non_relative (std::string);
226 static AudioEngine* instance() { return _instance; }
230 static AudioEngine* _instance;
232 jack_client_t* volatile _jack; /* could be reset to null by SIGPIPE or another thread */
233 std::string jack_client_name;
234 Glib::Mutex _process_lock;
235 Glib::Cond session_removed;
236 bool session_remove_pending;
239 mutable nframes_t _buffer_size;
240 std::map<DataType,size_t> _raw_buffer_sizes;
241 mutable nframes_t _frame_rate;
242 /// number of frames between each check for changes in monitor input
243 nframes_t monitor_check_interval;
244 /// time of the last monitor check in frames
245 nframes_t last_monitor_check;
246 /// the number of frames processed since start() was called
247 nframes_t _processed_frames;
249 bool _freewheel_pending;
250 boost::function<int(nframes_t)> freewheel_action;
251 bool reconnect_on_halt;
252 int _usecs_per_cycle;
254 SerializedRCUManager<Ports> ports;
256 Port *register_port (DataType type, const std::string& portname, bool input);
258 int process_callback (nframes_t nframes);
259 void remove_all_ports ();
261 std::string get_nth_physical (DataType type, uint32_t n, int flags);
263 void port_registration_failure (const std::string& portname);
265 static int _xrun_callback (void *arg);
266 static int _graph_order_callback (void *arg);
267 static int _process_callback (nframes_t nframes, void *arg);
268 static int _sample_rate_callback (nframes_t nframes, void *arg);
269 static int _bufsize_callback (nframes_t nframes, void *arg);
270 static void _jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int, void*);
271 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
272 static void _freewheel_callback (int , void *arg);
273 static void _registration_callback (jack_port_id_t, int, void *);
275 void jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int);
276 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
277 int jack_bufsize_callback (nframes_t);
278 int jack_sample_rate_callback (nframes_t);
280 int connect_to_jack (std::string client_name);
282 static void halted (void *);
284 void meter_thread ();
285 void start_metering_thread ();
286 void stop_metering_thread ();
288 Glib::Thread* m_meter_thread;
289 static gint m_meter_exit;
292 } // namespace ARDOUR
294 #endif /* __ardour_audioengine_h__ */