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__
24 #include "libardour-config.h"
34 #include <glibmm/thread.h>
37 #include "pbd/signals.h"
39 #include "ardour/ardour.h"
40 #include <jack/jack.h>
41 #include <jack/transport.h>
43 #include "ardour/data_type.h"
44 #include "ardour/session_handle.h"
45 #include "ardour/types.h"
46 #include "ardour/chan_count.h"
48 #ifdef HAVE_JACK_SESSION
49 #include <jack/session.h>
60 class AudioEngine : public SessionHandlePtr
63 typedef std::set<Port*> Ports;
65 class disconnected_exception : public std::exception {
67 virtual const char *what() const throw() { return "AudioEngine is disconnected"; }
70 AudioEngine (std::string client_name, std::string session_uuid);
71 virtual ~AudioEngine ();
73 jack_client_t* jack() const;
74 bool connected() const { return _jack != 0; }
76 bool is_realtime () const;
78 ProcessThread* main_thread() const { return _main_thread; }
80 std::string client_name() const { return jack_client_name; }
82 int reconnect_to_jack ();
83 int disconnect_from_jack();
85 bool will_reconnect_at_halt ();
86 void set_reconnect_at_halt (bool);
88 int stop (bool forever = false);
90 bool running() const { return _running; }
92 Glib::Mutex& process_lock() { return _process_lock; }
94 framecnt_t frame_rate () const;
95 pframes_t frames_per_cycle () const;
97 size_t raw_buffer_size(DataType t);
99 int usecs_per_cycle () const { return _usecs_per_cycle; }
101 bool get_sync_offset (pframes_t & offset) const;
103 pframes_t frames_since_cycle_start () {
104 jack_client_t* _priv_jack = _jack;
105 if (!_running || !_priv_jack) {
108 return jack_frames_since_cycle_start (_priv_jack);
111 pframes_t frame_time () {
112 jack_client_t* _priv_jack = _jack;
113 if (!_running || !_priv_jack) {
116 return jack_frame_time (_priv_jack);
119 pframes_t frame_time_at_cycle_start () {
120 jack_client_t* _priv_jack = _jack;
121 if (!_running || !_priv_jack) {
124 return jack_last_frame_time (_priv_jack);
127 pframes_t transport_frame () const {
128 const jack_client_t* _priv_jack = _jack;
129 if (!_running || !_priv_jack) {
132 return jack_get_current_transport_frame (_priv_jack);
135 int request_buffer_size (pframes_t);
137 framecnt_t set_monitor_check_interval (framecnt_t);
138 framecnt_t processed_frames() const { return _processed_frames; }
140 float get_cpu_load() {
141 jack_client_t* _priv_jack = _jack;
142 if (!_running || !_priv_jack) {
145 return jack_cpu_load (_priv_jack);
148 void set_session (Session *);
149 void remove_session (); // not a replacement for SessionHandle::session_going_away()
151 class PortRegistrationFailure : public std::exception {
153 PortRegistrationFailure (std::string const & why = "")
156 ~PortRegistrationFailure () throw () {}
158 virtual const char *what() const throw () { return reason.c_str(); }
164 class NoBackendAvailable : public std::exception {
166 virtual const char *what() const throw() { return "could not connect to engine backend"; }
169 Port *register_input_port (DataType, const std::string& portname);
170 Port *register_output_port (DataType, const std::string& portname);
171 int unregister_port (Port &);
173 bool port_is_physical (const std::string&) const;
174 void ensure_monitor_input (const std::string&, bool) const;
176 void split_cycle (pframes_t offset);
178 int connect (const std::string& source, const std::string& destination);
179 int disconnect (const std::string& source, const std::string& destination);
180 int disconnect (Port &);
182 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
184 bool can_request_hardware_monitoring ();
186 ChanCount n_physical_outputs () const;
187 ChanCount n_physical_inputs () const;
189 void get_physical_outputs (DataType type, std::vector<std::string>&);
190 void get_physical_inputs (DataType type, std::vector<std::string>&);
192 Port *get_port_by_name (const std::string &);
194 enum TransportState {
195 TransportStopped = JackTransportStopped,
196 TransportRolling = JackTransportRolling,
197 TransportLooping = JackTransportLooping,
198 TransportStarting = JackTransportStarting
201 void transport_start ();
202 void transport_stop ();
203 void transport_locate (framepos_t);
204 TransportState transport_state ();
206 int reset_timebase ();
208 void update_latencies ();
210 /* start/stop freewheeling */
212 int freewheel (bool onoff);
213 bool freewheeling() const { return _freewheeling; }
215 /* this signal is sent for every process() cycle while freewheeling.
216 _ the regular process() call to session->process() is not made.
219 PBD::Signal1<int, pframes_t> Freewheel;
221 PBD::Signal0<void> Xrun;
223 /* this signal is if JACK notifies us of a graph order event */
225 PBD::Signal0<void> GraphReordered;
227 #ifdef HAVE_JACK_SESSION
228 PBD::Signal1<void,jack_session_event_t *> JackSessionEvent;
232 /* this signal is emitted if the sample rate changes */
234 PBD::Signal1<void, framecnt_t> SampleRateChanged;
236 /* this signal is sent if JACK ever disconnects us */
238 PBD::Signal1<void,const char*> Halted;
240 /* these two are emitted when the engine itself is
244 PBD::Signal0<void> Running;
245 PBD::Signal0<void> Stopped;
247 /** Emitted if a JACK port is registered or unregistered */
248 PBD::Signal0<void> PortRegisteredOrUnregistered;
250 /** Emitted if a JACK port is connected or disconnected.
251 * The Port parameters are the ports being connected / disconnected, or 0 if they are not known to Ardour.
252 * The bool parameter is true if ports were connected, or false for disconnected.
254 PBD::Signal3<void, Port *, Port *, bool> PortConnectedOrDisconnected;
256 std::string make_port_name_relative (std::string) const;
257 std::string make_port_name_non_relative (std::string) const;
258 bool port_is_mine (const std::string&) const;
260 static AudioEngine* instance() { return _instance; }
263 int create_process_thread (boost::function<void()>, pthread_t*, size_t stacksize);
266 static AudioEngine* _instance;
268 jack_client_t* volatile _jack; /* could be reset to null by SIGPIPE or another thread */
269 std::string jack_client_name;
270 Glib::Mutex _process_lock;
271 Glib::Cond session_removed;
272 bool session_remove_pending;
275 mutable framecnt_t _buffer_size;
276 std::map<DataType,size_t> _raw_buffer_sizes;
277 mutable framecnt_t _frame_rate;
278 /// number of frames between each check for changes in monitor input
279 framecnt_t monitor_check_interval;
280 /// time of the last monitor check in frames
281 framecnt_t last_monitor_check;
282 /// the number of frames processed since start() was called
283 framecnt_t _processed_frames;
285 bool _freewheel_pending;
286 boost::function<int(framecnt_t)> freewheel_action;
287 bool reconnect_on_halt;
288 int _usecs_per_cycle;
289 bool port_remove_in_progress;
291 SerializedRCUManager<Ports> ports;
293 Port* register_port (DataType type, const std::string& portname, bool input);
295 int process_callback (pframes_t nframes);
296 void* process_thread ();
297 void remove_all_ports ();
299 ChanCount n_physical (unsigned long) const;
300 void get_physical (DataType, unsigned long, std::vector<std::string> &);
302 void port_registration_failure (const std::string& portname);
304 static int _xrun_callback (void *arg);
305 #ifdef HAVE_JACK_SESSION
306 static void _session_callback (jack_session_event_t *event, void *arg);
308 static int _graph_order_callback (void *arg);
309 static int _process_callback (pframes_t nframes, void *arg);
310 static void* _process_thread (void *arg);
311 static int _sample_rate_callback (pframes_t nframes, void *arg);
312 static int _bufsize_callback (pframes_t nframes, void *arg);
313 static void _jack_timebase_callback (jack_transport_state_t, pframes_t, jack_position_t*, int, void*);
314 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
315 static void _freewheel_callback (int , void *arg);
316 static void _registration_callback (jack_port_id_t, int, void *);
317 static void _connect_callback (jack_port_id_t, jack_port_id_t, int, void *);
319 void jack_timebase_callback (jack_transport_state_t, pframes_t, jack_position_t*, int);
320 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
321 int jack_bufsize_callback (pframes_t);
322 int jack_sample_rate_callback (pframes_t);
324 void set_jack_callbacks ();
326 static void _latency_callback (jack_latency_callback_mode_t, void*);
327 void jack_latency_callback (jack_latency_callback_mode_t);
329 int connect_to_jack (std::string client_name, std::string session_uuid);
331 static void halted (void *);
332 static void halted_info (jack_status_t,const char*,void *);
334 void meter_thread ();
335 void start_metering_thread ();
336 void stop_metering_thread ();
338 Glib::Thread* m_meter_thread;
339 static gint m_meter_exit;
341 ProcessThread* _main_thread;
345 boost::function<void()> f;
348 ThreadData (AudioEngine* ae, boost::function<void()> fp, size_t stacksz)
349 : engine (ae) , f (fp) , stacksize (stacksz) {}
352 static void* _start_process_thread (void*);
355 } // namespace ARDOUR
357 #endif /* __ardour_audioengine_h__ */