Paul Davis
e9be3beb2a
These are not used yet, because only the Session really acts as a Provider and it uses the Config::default_time_domain to serialize that state
103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
/*
|
|
Copyright (C) 2023 Paul Davis <paul@linuxaudiosystems.com>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef __temporal_domain_provider_h__
|
|
#define __temporal_domain_provider_h__
|
|
|
|
#include "pbd/signals.h"
|
|
#include "pbd/stateful.h"
|
|
|
|
#include "temporal/types.h"
|
|
|
|
namespace Temporal {
|
|
|
|
class TimeDomainProvider {
|
|
public:
|
|
explicit TimeDomainProvider () : have_domain (false), parent (nullptr) {}
|
|
explicit TimeDomainProvider (TimeDomain td) : have_domain (true), domain (td), parent (nullptr) {}
|
|
TimeDomainProvider (TimeDomain td, TimeDomainProvider const & p) : have_domain (true), domain (td), parent (&p) { listen(); }
|
|
|
|
/* Copy constructor - note how a constructor that only set the parent would have the same signature. */
|
|
TimeDomainProvider (TimeDomainProvider const & other) : have_domain (other.have_domain), domain (other.domain), parent (other.parent) { listen(); }
|
|
|
|
/* The extra bool argument is just to differentiate this from the copy constructor above */
|
|
TimeDomainProvider (TimeDomainProvider const & parnt, bool) : have_domain (false), parent (&parnt) { listen(); }
|
|
|
|
virtual ~TimeDomainProvider() {}
|
|
|
|
/* replicates part of Stateful API but we do not want inheritance */
|
|
|
|
XMLNode& get_state () const;
|
|
int set_state (const XMLNode&, int version);
|
|
|
|
TimeDomainProvider& operator= (TimeDomainProvider const & other) {
|
|
if (this != &other) {
|
|
parent_connection.disconnect ();
|
|
have_domain = other.have_domain;
|
|
domain = other.domain;
|
|
parent = other.parent;
|
|
listen ();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
TimeDomain time_domain() const { if (have_domain) return domain; if (parent) return parent->time_domain(); return AudioTime; }
|
|
|
|
bool has_own_time_domain() const { return have_domain; }
|
|
void clear_time_domain () { have_domain = false; TimeDomainChanged(); /* EMIT SIGNAL */ }
|
|
void set_time_domain (TimeDomain td) { have_domain = true; domain = td; time_domain_changed(); TimeDomainChanged(); /* EMIT SIGNAL */}
|
|
|
|
TimeDomainProvider const * time_domain_parent() const { return parent; }
|
|
bool has_time_domain_parent() const { return (bool) parent; }
|
|
void clear_time_domain_parent () { parent = nullptr; TimeDomainChanged (); /* EMIT SIGNAL */ }
|
|
void set_time_domain_parent (TimeDomainProvider const & p) {
|
|
parent_connection.disconnect ();
|
|
TimeDomain old_domain = time_domain();
|
|
parent = &p;
|
|
have_domain = false;
|
|
TimeDomain new_domain = time_domain ();
|
|
if (old_domain != new_domain) {
|
|
TimeDomainChanged ();
|
|
}
|
|
}
|
|
|
|
mutable PBD::Signal0<void> TimeDomainChanged;
|
|
|
|
virtual void time_domain_changed() {
|
|
/* Forward a time domain change to children */
|
|
TimeDomainChanged();
|
|
}
|
|
|
|
protected:
|
|
void listen () {
|
|
if (parent) {
|
|
parent->TimeDomainChanged.connect_same_thread (parent_connection, boost::bind (&TimeDomainProvider::time_domain_changed, this));
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool have_domain;
|
|
TimeDomain domain;
|
|
TimeDomainProvider const * parent;
|
|
PBD::ScopedConnection parent_connection;
|
|
};
|
|
|
|
}
|
|
|
|
#endif /* __temporal_domain_provider_h__ */
|