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 <jack/weakjack.h>
40 #include <jack/jack.h>
41 #include <jack/transport.h>
42 #include <jack/thread.h>
44 #include "ardour/ardour.h"
46 #include "ardour/data_type.h"
47 #include "ardour/session_handle.h"
48 #include "ardour/types.h"
49 #include "ardour/chan_count.h"
51 #ifdef HAVE_JACK_SESSION
52 #include <jack/session.h>
63 class AudioEngine : public SessionHandlePtr
66 typedef std::set<Port*> Ports;
68 class disconnected_exception : public std::exception {
70 virtual const char *what() const throw() { return "AudioEngine is disconnected"; }
73 AudioEngine (std::string client_name, std::string session_uuid);
74 virtual ~AudioEngine ();
76 jack_client_t* jack() const;
77 bool connected() const { return _jack != 0; }
79 bool is_realtime () const;
81 ProcessThread* main_thread() const { return _main_thread; }
83 std::string client_name() const { return jack_client_name; }
85 int reconnect_to_jack ();
86 int disconnect_from_jack();
88 bool will_reconnect_at_halt ();
89 void set_reconnect_at_halt (bool);
91 int stop (bool forever = false);
93 bool running() const { return _running; }
95 Glib::Mutex& process_lock() { return _process_lock; }
97 framecnt_t frame_rate () const;
98 pframes_t frames_per_cycle () const;
100 size_t raw_buffer_size(DataType t);
102 int usecs_per_cycle () const { return _usecs_per_cycle; }
104 bool get_sync_offset (pframes_t & offset) const;
106 pframes_t frames_since_cycle_start () {
107 jack_client_t* _priv_jack = _jack;
108 if (!_running || !_priv_jack) {
111 return jack_frames_since_cycle_start (_priv_jack);
114 pframes_t frame_time () {
115 jack_client_t* _priv_jack = _jack;
116 if (!_running || !_priv_jack) {
119 return jack_frame_time (_priv_jack);
122 pframes_t frame_time_at_cycle_start () {
123 jack_client_t* _priv_jack = _jack;
124 if (!_running || !_priv_jack) {
127 return jack_last_frame_time (_priv_jack);
130 pframes_t transport_frame () const {
131 const jack_client_t* _priv_jack = _jack;
132 if (!_running || !_priv_jack) {
135 return jack_get_current_transport_frame (_priv_jack);
138 int request_buffer_size (pframes_t);
140 framecnt_t set_monitor_check_interval (framecnt_t);
141 framecnt_t processed_frames() const { return _processed_frames; }
143 float get_cpu_load() {
144 jack_client_t* _priv_jack = _jack;
145 if (!_running || !_priv_jack) {
148 return jack_cpu_load (_priv_jack);
151 void set_session (Session *);
152 void remove_session (); // not a replacement for SessionHandle::session_going_away()
154 class PortRegistrationFailure : public std::exception {
156 PortRegistrationFailure (std::string const & why = "")
159 ~PortRegistrationFailure () throw () {}
161 virtual const char *what() const throw () { return reason.c_str(); }
167 class NoBackendAvailable : public std::exception {
169 virtual const char *what() const throw() { return "could not connect to engine backend"; }
172 Port *register_input_port (DataType, const std::string& portname);
173 Port *register_output_port (DataType, const std::string& portname);
174 int unregister_port (Port &);
176 bool port_is_physical (const std::string&) const;
177 void ensure_monitor_input (const std::string&, bool) const;
179 void split_cycle (pframes_t offset);
181 int connect (const std::string& source, const std::string& destination);
182 int disconnect (const std::string& source, const std::string& destination);
183 int disconnect (Port &);
185 const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
187 bool can_request_hardware_monitoring ();
189 ChanCount n_physical_outputs () const;
190 ChanCount n_physical_inputs () const;
192 void get_physical_outputs (DataType type, std::vector<std::string>&);
193 void get_physical_inputs (DataType type, std::vector<std::string>&);
195 Port *get_port_by_name (const std::string &);
197 enum TransportState {
198 TransportStopped = JackTransportStopped,
199 TransportRolling = JackTransportRolling,
200 TransportLooping = JackTransportLooping,
201 TransportStarting = JackTransportStarting
204 void transport_start ();
205 void transport_stop ();
206 void transport_locate (framepos_t);
207 TransportState transport_state ();
209 int reset_timebase ();
211 void update_latencies ();
213 /* start/stop freewheeling */
215 int freewheel (bool onoff);
216 bool freewheeling() const { return _freewheeling; }
218 /* this signal is sent for every process() cycle while freewheeling.
219 _ the regular process() call to session->process() is not made.
222 PBD::Signal1<int, pframes_t> Freewheel;
224 PBD::Signal0<void> Xrun;
226 /* this signal is if JACK notifies us of a graph order event */
228 PBD::Signal0<void> GraphReordered;
230 #ifdef HAVE_JACK_SESSION
231 PBD::Signal1<void,jack_session_event_t *> JackSessionEvent;
235 /* this signal is emitted if the sample rate changes */
237 PBD::Signal1<void, framecnt_t> SampleRateChanged;
239 /* this signal is sent if JACK ever disconnects us */
241 PBD::Signal1<void,const char*> Halted;
243 /* these two are emitted when the engine itself is
247 PBD::Signal0<void> Running;
248 PBD::Signal0<void> Stopped;
250 /** Emitted if a JACK port is registered or unregistered */
251 PBD::Signal0<void> PortRegisteredOrUnregistered;
253 /** Emitted if a JACK port is connected or disconnected.
254 * The Port parameters are the ports being connected / disconnected, or 0 if they are not known to Ardour.
255 * The std::string parameters are the (long) port names.
256 * The bool parameter is true if ports were connected, or false for disconnected.
258 PBD::Signal5<void, Port *, std::string, Port *, std::string, bool> PortConnectedOrDisconnected;
260 std::string make_port_name_relative (std::string) const;
261 std::string make_port_name_non_relative (std::string) const;
262 bool port_is_mine (const std::string&) const;
264 static AudioEngine* instance() { return _instance; }
267 int create_process_thread (boost::function<void()>, pthread_t*, size_t stacksize);
270 static AudioEngine* _instance;
272 jack_client_t* volatile _jack; /* could be reset to null by SIGPIPE or another thread */
273 std::string jack_client_name;
274 Glib::Mutex _process_lock;
275 Glib::Cond session_removed;
276 bool session_remove_pending;
279 mutable framecnt_t _buffer_size;
280 std::map<DataType,size_t> _raw_buffer_sizes;
281 mutable framecnt_t _frame_rate;
282 /// number of frames between each check for changes in monitor input
283 framecnt_t monitor_check_interval;
284 /// time of the last monitor check in frames
285 framecnt_t last_monitor_check;
286 /// the number of frames processed since start() was called
287 framecnt_t _processed_frames;
289 bool _freewheel_pending;
290 boost::function<int(framecnt_t)> freewheel_action;
291 bool reconnect_on_halt;
292 int _usecs_per_cycle;
293 bool port_remove_in_progress;
295 SerializedRCUManager<Ports> ports;
297 Port* register_port (DataType type, const std::string& portname, bool input);
299 int process_callback (pframes_t nframes);
300 void* process_thread ();
301 void remove_all_ports ();
303 ChanCount n_physical (unsigned long) const;
304 void get_physical (DataType, unsigned long, std::vector<std::string> &);
306 void port_registration_failure (const std::string& portname);
308 static int _xrun_callback (void *arg);
309 #ifdef HAVE_JACK_SESSION
310 static void _session_callback (jack_session_event_t *event, void *arg);
312 static int _graph_order_callback (void *arg);
313 static int _process_callback (pframes_t nframes, void *arg);
314 static void* _process_thread (void *arg);
315 static int _sample_rate_callback (pframes_t nframes, void *arg);
316 static int _bufsize_callback (pframes_t nframes, void *arg);
317 static void _jack_timebase_callback (jack_transport_state_t, pframes_t, jack_position_t*, int, void*);
318 static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
319 static void _freewheel_callback (int , void *arg);
320 static void _registration_callback (jack_port_id_t, int, void *);
321 static void _connect_callback (jack_port_id_t, jack_port_id_t, int, void *);
323 void jack_timebase_callback (jack_transport_state_t, pframes_t, jack_position_t*, int);
324 int jack_sync_callback (jack_transport_state_t, jack_position_t*);
325 int jack_bufsize_callback (pframes_t);
326 int jack_sample_rate_callback (pframes_t);
328 void set_jack_callbacks ();
330 static void _latency_callback (jack_latency_callback_mode_t, void*);
331 void jack_latency_callback (jack_latency_callback_mode_t);
333 int connect_to_jack (std::string client_name, std::string session_uuid);
335 static void halted (void *);
336 static void halted_info (jack_status_t,const char*,void *);
338 void meter_thread ();
339 void start_metering_thread ();
340 void stop_metering_thread ();
342 Glib::Thread* m_meter_thread;
343 static gint m_meter_exit;
345 ProcessThread* _main_thread;
349 boost::function<void()> f;
352 ThreadData (AudioEngine* ae, boost::function<void()> fp, size_t stacksz)
353 : engine (ae) , f (fp) , stacksize (stacksz) {}
356 static void* _start_process_thread (void*);
359 } // namespace ARDOUR
361 #endif /* __ardour_audioengine_h__ */