136 lines
4.6 KiB
C++
136 lines
4.6 KiB
C++
/*
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* Copyright (C) 2018-2019 Paul Davis <paul@linuxaudiosystems.com>
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __ardour_transport_master_manager_h__
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#define __ardour_transport_master_manager_h__
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#include <string>
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#include <boost/noncopyable.hpp>
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#include "ardour/transport_master.h"
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#include "ardour/types.h"
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namespace ARDOUR {
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class UI_TransportMaster;
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class LIBARDOUR_API TransportMasterManager : public boost::noncopyable
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{
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public:
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static TransportMasterManager& create ();
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~TransportMasterManager ();
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int set_default_configuration ();
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void restart ();
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void engine_stopped ();
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static TransportMasterManager& instance();
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static void destroy();
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/* this method is not thread-safe and is intended to be used only
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* very early in application-lifetime to check if the TMM has
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* been created yet. Do not use in other code.
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*/
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static bool exists() { return _instance != 0; }
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typedef std::list<boost::shared_ptr<TransportMaster> > TransportMasters;
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int add (SyncSource type, std::string const & name, bool removeable = true);
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int remove (std::string const & name);
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void clear ();
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PBD::Signal1<void,boost::shared_ptr<TransportMaster> > Added;
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PBD::Signal1<void,boost::shared_ptr<TransportMaster> > Removed; // null argument means "clear"
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double pre_process_transport_masters (pframes_t, samplepos_t session_transport_position);
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double get_current_speed_in_process_context() const { return _master_speed; }
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samplepos_t get_current_position_in_process_context() const { return _master_position; }
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boost::shared_ptr<TransportMaster> current() const { return _current_master; }
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int set_current (boost::shared_ptr<TransportMaster>);
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int set_current (SyncSource);
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int set_current (std::string const &);
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PBD::Signal2<void,boost::shared_ptr<TransportMaster>, boost::shared_ptr<TransportMaster> > CurrentChanged;
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int set_state (XMLNode const &, int);
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XMLNode& get_state() const;
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void set_session (Session*);
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Session* session() const { return _session; }
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bool master_invalid_this_cycle() const { return _master_invalid_this_cycle; }
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boost::shared_ptr<TransportMaster> master_by_type (SyncSource src) const;
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boost::shared_ptr<TransportMaster> master_by_name (std::string const &) const;
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boost::shared_ptr<TransportMaster> master_by_port (boost::shared_ptr<Port> const &p) const;
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TransportMasters const & transport_masters() const { return _transport_masters; }
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static const std::string state_node_name;
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void block_disk_output ();
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void unblock_disk_output ();
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void reinit (double speed, samplepos_t pos);
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private:
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TransportMasterManager();
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TransportMasters _transport_masters;
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mutable Glib::Threads::RWLock lock;
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double _master_speed;
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samplepos_t _master_position;
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boost::shared_ptr<TransportMaster> _current_master;
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Session* _session;
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bool _master_invalid_this_cycle;
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bool disk_output_blocked;
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/* a DLL to chase the transport master, calculate playback speed
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* by matching Ardour's current playhead position against
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* the position of the transport-master */
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double t0; // PH position at the beginning of this cycle
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double t1; // expected PH position if next cycle
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double e2; // second order loop error
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double bandwidth; // DLL filter bandwidth
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double b, c, omega; // DLL filter coefficients
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void init_transport_master_dll (double speed, samplepos_t pos);
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int master_dll_initstate; // play-direction -1, +1, or 0: not initialized
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static TransportMasterManager* _instance;
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/* original TC format in case the slave changed it */
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boost::optional<Timecode::TimecodeFormat> _session_tc_format;
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void maybe_restore_tc_format ();
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void maybe_set_tc_format ();
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int add_locked (boost::shared_ptr<TransportMaster>);
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double compute_matching_master_speed (pframes_t nframes, samplepos_t, bool& locate_required);
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int set_current_locked (boost::shared_ptr<TransportMaster>);
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PBD::ScopedConnection config_connection;
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void parameter_changed (std::string const & what);
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};
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} // namespace ARDOUR
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#endif /* __ardour_transport_master_manager_h__ */
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