277 lines
7.6 KiB
C++
277 lines
7.6 KiB
C++
/*
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Copyright (C) 2002-2004 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __ardour_audioengine_h__
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#define __ardour_audioengine_h__
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#include <list>
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#include <set>
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#include <cmath>
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#include <exception>
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#include <string>
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#include <sigc++/signal.h>
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#include <glibmm/thread.h>
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#include <pbd/rcu.h>
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#include <ardour/ardour.h>
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#include <jack/jack.h>
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#include <jack/transport.h>
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#include <ardour/types.h>
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#include <ardour/data_type.h>
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namespace ARDOUR {
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class Session;
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class Port;
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class InternalPort;
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class AudioEngine : public sigc::trackable
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{
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public:
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typedef std::set<Port*> Ports;
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AudioEngine (std::string client_name);
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virtual ~AudioEngine ();
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jack_client_t* jack() const;
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bool connected() const { return _jack != 0; }
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bool is_realtime () const;
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std::string client_name() const { return jack_client_name; }
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int reconnect_to_jack ();
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int disconnect_from_jack();
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bool will_reconnect_at_halt ();
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void set_reconnect_at_halt (bool);
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int stop (bool forever = false);
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int start ();
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bool running() const { return _running; }
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Glib::Mutex& process_lock() { return _process_lock; }
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nframes_t frame_rate();
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nframes_t frames_per_cycle();
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int usecs_per_cycle () const { return _usecs_per_cycle; }
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bool get_sync_offset (nframes_t& offset) const;
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nframes_t frames_since_cycle_start () {
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if (!_running || !_jack) return 0;
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return jack_frames_since_cycle_start (_jack);
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}
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nframes_t frame_time () {
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if (!_running || !_jack) return 0;
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return jack_frame_time (_jack);
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}
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nframes_t transport_frame () const {
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if (!_running || !_jack) return 0;
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return jack_get_current_transport_frame (_jack);
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}
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int request_buffer_size (nframes_t);
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nframes_t set_monitor_check_interval (nframes_t);
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float get_cpu_load() {
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if (!_running || !_jack) return 0;
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return jack_cpu_load (_jack);
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}
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void set_session (Session *);
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void remove_session ();
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class PortRegistrationFailure : public std::exception {
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public:
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PortRegistrationFailure (const char* why = "") {
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reason = why;
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}
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virtual const char *what() const throw() { return reason; }
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private:
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const char* reason;
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};
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class NoBackendAvailable : public std::exception {
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public:
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virtual const char *what() const throw() { return "could not connect to engine backend"; }
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};
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Port *register_input_port (DataType, const std::string& portname, bool publish);
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Port *register_output_port (DataType, const std::string& portname, bool publish);
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int unregister_port (Port &);
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int connect (const std::string& source, const std::string& destination);
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int disconnect (const std::string& source, const std::string& destination);
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int disconnect (Port &);
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const char ** get_ports (const std::string& port_name_pattern, const std::string& type_name_pattern, uint32_t flags);
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uint32_t n_physical_outputs () const;
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uint32_t n_physical_inputs () const;
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bool can_request_hardware_monitoring ();
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void get_physical_outputs (std::vector<std::string>&);
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void get_physical_inputs (std::vector<std::string>&);
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std::string get_nth_physical_output (DataType type, uint32_t n) {
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return get_nth_physical (type, n, JackPortIsInput);
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}
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std::string get_nth_physical_input (DataType type, uint32_t n) {
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return get_nth_physical (type, n, JackPortIsOutput);
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}
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nframes_t get_port_total_latency (const Port&);
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void update_total_latencies ();
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void update_total_latency (const Port&);
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/** Caller may not delete the object pointed to by the return value
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*/
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Port *get_port_by_name (const std::string& name, bool keep = true) const;
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enum TransportState {
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TransportStopped = JackTransportStopped,
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TransportRolling = JackTransportRolling,
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TransportLooping = JackTransportLooping,
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TransportStarting = JackTransportStarting
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};
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void transport_start ();
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void transport_stop ();
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void transport_locate (nframes_t);
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TransportState transport_state ();
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int reset_timebase ();
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/* start/stop freewheeling */
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int freewheel (bool onoff);
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bool freewheeling() const { return _freewheeling; }
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/* this signal is sent for every process() cycle while freewheeling.
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the regular process() call to session->process() is not made.
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*/
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sigc::signal<int,nframes_t> Freewheel;
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sigc::signal<void> Xrun;
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/* this signal is if JACK notifies us of a graph order event */
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sigc::signal<void> GraphReordered;
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/* this signal is emitted if the sample rate changes */
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sigc::signal<void,nframes_t> SampleRateChanged;
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/* this signal is sent if JACK ever disconnects us */
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sigc::signal<void> Halted;
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/* these two are emitted when the engine itself is
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started and stopped
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*/
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sigc::signal<void> Running;
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sigc::signal<void> Stopped;
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std::string make_port_name_relative (std::string);
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std::string make_port_name_non_relative (std::string);
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private:
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ARDOUR::Session *session;
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jack_client_t *_jack;
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std::string jack_client_name;
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mutable Glib::Mutex _process_lock;
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Glib::Cond session_removed;
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bool session_remove_pending;
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bool _running;
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bool _has_run;
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nframes_t _buffer_size;
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nframes_t _frame_rate;
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/// number of frames between each check for changes in monitor input
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nframes_t monitor_check_interval;
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/// time of the last monitor check in frames
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nframes_t last_monitor_check;
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/// the number of frames processed since start() was called
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nframes_t _processed_frames;
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bool _freewheeling;
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bool _freewheel_thread_registered;
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sigc::slot<int,nframes_t> freewheel_action;
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bool reconnect_on_halt;
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int _usecs_per_cycle;
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SerializedRCUManager<Ports> ports;
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Port *register_port (DataType type, const std::string& portname, bool input, bool publish);
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int process_callback (nframes_t nframes);
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void remove_all_ports ();
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Port* get_port (const std::string& short_name);
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typedef std::pair<std::string,std::string> PortConnection;
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typedef std::list<PortConnection> PortConnections;
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PortConnections port_connections;
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void remove_connections_for (Port&);
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std::string get_nth_physical (DataType type, uint32_t n, int flags);
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void port_registration_failure (const std::string& portname);
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static int _xrun_callback (void *arg);
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static int _graph_order_callback (void *arg);
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static int _process_callback (nframes_t nframes, void *arg);
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static int _sample_rate_callback (nframes_t nframes, void *arg);
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static int _bufsize_callback (nframes_t nframes, void *arg);
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static void _jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int, void*);
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static int _jack_sync_callback (jack_transport_state_t, jack_position_t*, void *arg);
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static void _freewheel_callback (int , void *arg);
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void jack_timebase_callback (jack_transport_state_t, nframes_t, jack_position_t*, int);
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int jack_sync_callback (jack_transport_state_t, jack_position_t*);
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int jack_bufsize_callback (nframes_t);
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int jack_sample_rate_callback (nframes_t);
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static void halted (void *);
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int connect_to_jack (std::string client_name);
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void meter_thread ();
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void start_metering_thread ();
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void stop_metering_thread ();
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Glib::Thread* m_meter_thread;
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static gint m_meter_exit;
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};
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} // namespace ARDOUR
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#endif /* __ardour_audioengine_h__ */
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