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tempo map: add data structure and methods for (fast?) lookup tables 

As of this commit, none of the data structures are used.
This commit is contained in:
Paul Davis 2023-02-13 17:04:13 -07:00
parent 92bd8461ca
commit 6f095b91ce
2 changed files with 112 additions and 0 deletions
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83
libs/temporal/tempo.cc
View File

@ -3424,6 +3424,89 @@ TempoMap::write_copy()
return _map_mgr.write_copy();
}
void
TempoMap::drop_lookup_table (){
superclock_beat_lookup_table.clear ();
beat_superclock_lookup_table.clear ();
beat_bbt_lookup_table.clear ();
superclock_bbt_lookup_table.clear ();
}
Temporal::Beats
TempoMap::beat_lookup (superclock_t sc, bool& found) const
{
LookupTable::const_iterator i = superclock_beat_lookup_table.find (sc);
if (i == superclock_beat_lookup_table.end()) {
found = false;
return Beats();;
}
found = true;
return Temporal::Beats::ticks (i->second);
}
superclock_t
TempoMap::superclock_lookup (Temporal::Beats const & b, bool& found) const
{
LookupTable::const_iterator i = beat_superclock_lookup_table.find (b.to_ticks());
if (i == beat_superclock_lookup_table.end()) {
found = false;
return 0;
}
found = true;
return i->second;
}
BBT_Time
TempoMap::bbt_lookup (Temporal::Beats const & b, bool& found) const
{
LookupTable::const_iterator i = beat_bbt_lookup_table.find (b.to_ticks());
if (i == beat_bbt_lookup_table.end()) {
found = false;
return BBT_Time ();
}
found = true;
return BBT_Time::from_integer (i->second);
}
BBT_Time
TempoMap::bbt_lookup (superclock_t sc, bool& found) const
{
LookupTable::const_iterator i = superclock_bbt_lookup_table.find (sc);
if (i == superclock_bbt_lookup_table.end()) {
found = false;
return BBT_Time ();
}
found = true;
return BBT_Time::from_integer (i->second);
}
/* see tempo.h comments about why this is const */
void
TempoMap::superclock_to_beat_store (superclock_t sc, Temporal::Beats const & b) const
{
superclock_beat_lookup_table[sc] = b.to_ticks();
}
/* see tempo.h comments about why this is const */
void
TempoMap::beat_to_superclock_store (Temporal::Beats const & b, superclock_t sc) const
{
beat_superclock_lookup_table[b.to_ticks()] = sc;
}
void
TempoMap::superclock_to_bbt_store (superclock_t sc, BBT_Time const & bbt) const
{
superclock_bbt_lookup_table[sc] = bbt.as_integer ();
}
void
TempoMap::beat_to_bbt_store (Temporal::Beats const & b, BBT_Time const & bbt) const
{
beat_bbt_lookup_table[b.to_ticks()] = bbt.as_integer ();
}
int
TempoMap::update (TempoMap::WritableSharedPtr m)
{

29
libs/temporal/temporal/tempo.h
View File

@ -24,6 +24,7 @@
#include <vector>
#include <cmath>
#include <exception>
#include <unordered_map>
#include <boost/intrusive/list.hpp>
@ -1086,6 +1087,34 @@ class /*LIBTEMPORAL_API*/ TempoMap : public PBD::StatefulDestructible
int parse_tempo_state_3x (const XMLNode& node, LegacyTempoState& lts);
int parse_meter_state_3x (const XMLNode& node, LegacyMeterState& lts);
int set_state_3x (XMLNode const &);
typedef std::unordered_map<int64_t,int64_t> LookupTable;
mutable LookupTable superclock_beat_lookup_table;
mutable LookupTable beat_superclock_lookup_table;
mutable LookupTable beat_bbt_lookup_table;
mutable LookupTable superclock_bbt_lookup_table;
friend class TempoPoint;
friend class MeterPoint;
friend class TempoMetric;
Temporal::Beats beat_lookup (superclock_t, bool& found) const;
superclock_t superclock_lookup (Temporal::Beats const &, bool& found) const;
Temporal::BBT_Time bbt_lookup (superclock_t, bool & found) const;
Temporal::BBT_Time bbt_lookup (Temporal::Beats const & b, bool & found) const;
/* These are not really const, but the lookup tables are marked mutable
* to allow time domain conversions to store their results while being
* marked const (which is more semantically correct).
*/
void superclock_to_beat_store (superclock_t, Temporal::Beats const &) const;
void beat_to_superclock_store (Temporal::Beats const &, superclock_t) const;;
void beat_to_bbt_store (Temporal::Beats const &, Temporal::BBT_Time const &) const;;
void superclock_to_bbt_store (superclock_t, Temporal::BBT_Time const &) const;;
void drop_lookup_table ();
};
class LIBTEMPORAL_API TempoCommand : public Command {