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livetrax/libs/temporal/enums.cc
Mads Kiilerich 622876c8ab temporal: reset global superclock rate when creating a new session
The superclock rate is variable and is stored in session files since
7.0 . It is set globally when reading from a session file, and it really
should be reset to a known state whenever a new blank session is
created from an existing one. Currently, that doesn't happen. We fix
that by resetting it in Temporal::reset().

For now, we are duplicating the default superclock rate 282240000 from
superclock.h , but we can drop that when all code paths that use
superclock also use Temporal::reset().

This will provide an (extra) guarantee that
set_superclock_ticks_per_second() always is invoked before creating
TempoMap or using superclock_ticks_per_second() in other ways. The
DEBUG_EARLY_SCTS_USE in superclock.h is thus closer to passing.
2023-09-20 12:30:53 -06:00

94 lines
2.6 KiB
C++

/*
* Copyright (C) 2020 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <typeinfo>
#include "pbd/enumwriter.h"
#include "temporal/types.h"
#include "temporal/tempo.h"
using namespace PBD;
using namespace Temporal;
using namespace std;
static bool libtemporal_initialized = false;
void
setup_libtemporal_enums ()
{
EnumWriter& enum_writer (EnumWriter::instance());
vector<int> i;
vector<string> s;
Temporal::TimeDomain td;
Temporal::OverlapType _OverlapType;
Temporal::Tempo::Type _TempoType;
#define REGISTER(e) enum_writer.register_distinct (typeid(e).name(), i, s); i.clear(); s.clear()
#define REGISTER_BITS(e) enum_writer.register_bits (typeid(e).name(), i, s); i.clear(); s.clear()
#define REGISTER_ENUM(e) i.push_back (e); s.push_back (#e)
#define REGISTER_CLASS_ENUM(t,e) i.push_back (t::e); s.push_back (#e)
REGISTER_ENUM (AudioTime);
REGISTER_ENUM (BeatTime);
REGISTER (td);
REGISTER_ENUM (Temporal::OverlapNone);
REGISTER_ENUM (Temporal::OverlapInternal);
REGISTER_ENUM (Temporal::OverlapStart);
REGISTER_ENUM (Temporal::OverlapEnd);
REGISTER_ENUM (Temporal::OverlapExternal);
REGISTER(_OverlapType);
REGISTER_CLASS_ENUM (Tempo, Ramped);
REGISTER_CLASS_ENUM (Tempo, Constant);
REGISTER (_TempoType);
enum_writer.add_to_hack_table ("Tempo::Ramped", "Ramped");
enum_writer.add_to_hack_table ("Tempo::Constant", "Constant");
}
void Temporal::init ()
{
if (!libtemporal_initialized) {
setup_libtemporal_enums ();
TempoMap::init ();
libtemporal_initialized = true;
}
}
void Temporal::reset ()
{
set_superclock_ticks_per_second (282240000); /* 2^10 * 3^2 * 5^4 * 7^2 */
(void) TempoMap::write_copy(); /* we are going to throw away the return value and replace the map entirely */
TempoMap::WritableSharedPtr new_map (new TempoMap (Tempo (120, 4), Meter (4, 4)));
TempoMap::update (new_map);;
}
std::ostream&
operator<< (std::ostream& o, Temporal::ratio_t const & r)
{
return o << r.numerator() << '/' << r.denominator();
}