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livetrax/libs/temporal/tempo.cc

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/*
Copyright (C) 2017 Paul Davis
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.
*/
#include <algorithm>
#include "pbd/error.h"
#include "pbd/i18n.h"
#include "pbd/compose.h"
#include "pbd/enumwriter.h"
#include "pbd/failed_constructor.h"
#include "pbd/stacktrace.h"
#include "temporal/debug.h"
#include "temporal/tempo.h"
using namespace PBD;
using namespace Temporal;
using std::cerr;
using std::cout;
using std::endl;
using Temporal::superclock_t;
std::string Tempo::xml_node_name = X_("Tempo");
std::string Meter::xml_node_name = X_("Meter");
superclock_t Temporal::superclock_ticks_per_second = 508032000; // 2^10 * 3^4 * 5^3 * 7^2
SerializedRCUManager<TempoMap> TempoMap::_map_mgr (0);
thread_local TempoMap::SharedPtr TempoMap::_tempo_map_p;
void
Point::add_state (XMLNode & node) const
{
node.set_property (X_("sclock"), _sclock);
node.set_property (X_("quarters"), _quarters);
node.set_property (X_("bbt"), _bbt);
}
Point::Point (TempoMap const & map, XMLNode const & node)
: _map (&map)
{
if (!node.get_property (X_("sclock"), _sclock)) {
throw failed_constructor();
}
if (!node.get_property (X_("quarters"), _quarters)) {
throw failed_constructor();
}
if (!node.get_property (X_("bbt"), _bbt)) {
throw failed_constructor();
}
}
#if 0
samplepos_t
Point::sample() const
{
return superclock_to_samples (_sclock, _map->sample_rate());
}
#endif
timepos_t
Point::time() const
{
switch (_map->time_domain()) {
case AudioTime:
return timepos_t::from_superclock (sclock());
case BeatTime:
return timepos_t (beats());
case BarTime:
/*NOTREACHED*/
break;
}
/*NOTREACHED*/
abort();
/*NOTREACHED*/
return timepos_t (AudioTime);
}
Tempo::Tempo (XMLNode const & node)
{
assert (node.name() == xml_node_name);
if (!node.get_property (X_("scpnt-start"), _superclocks_per_note_type)) {
throw failed_constructor ();
}
if (!node.get_property (X_("scpnt-end"), _end_superclocks_per_note_type)) {
throw failed_constructor ();
}
if (!node.get_property (X_("note-type"), _note_type)) {
throw failed_constructor ();
}
if (!node.get_property (X_("type"), _type)) {
throw failed_constructor ();
}
if (!node.get_property (X_("active"), _active)) {
throw failed_constructor ();
}
}
bool
Tempo::set_ramped (bool yn)
{
_type = (yn ? Ramped : Constant);
return true;
}
bool
Tempo::set_clamped (bool)
{
#warning implement Tempo::set_clamped
return true;
}
XMLNode&
Tempo::get_state () const
{
XMLNode* node = new XMLNode (xml_node_name);
node->set_property (X_("scpnt-start"), superclocks_per_note_type());
node->set_property (X_("scpnt-end"), end_superclocks_per_note_type());
node->set_property (X_("note-type"), note_type());
node->set_property (X_("type"), type());
node->set_property (X_("active"), active());
return *node;
}
int
Tempo::set_state (XMLNode const & node, int /*version*/)
{
if (node.name() != xml_node_name) {
return -1;
}
node.get_property (X_("scpnt-start"), _superclocks_per_note_type);
node.get_property (X_("scpnt-end"), _end_superclocks_per_note_type);
node.get_property (X_("note-type"), _note_type);
node.get_property (X_("type"), _type);
node.get_property (X_("active"), _active);
return 0;
}
Meter::Meter (XMLNode const & node)
{
assert (node.name() == xml_node_name);
if (!node.get_property (X_("note-value"), _note_value)) {
throw failed_constructor ();
}
if (!node.get_property (X_("divisions-per-bar"), _divisions_per_bar)) {
throw failed_constructor ();
}
}
XMLNode&
Meter::get_state () const
{
XMLNode* node = new XMLNode (xml_node_name);
node->set_property (X_("note-value"), note_value());
node->set_property (X_("divisions-per-bar"), divisions_per_bar());
return *node;
}
int
Meter::set_state (XMLNode const & node, int /* version */)
{
if (node.name() != xml_node_name) {
return -1;
}
node.get_property (X_("note-value"), _note_value);
node.get_property (X_("divisions-per-bar"), _divisions_per_bar);
return 0;
}
Temporal::BBT_Time
Meter::bbt_add (Temporal::BBT_Time const & bbt, Temporal::BBT_Offset const & add) const
{
int32_t bars = bbt.bars;
int32_t beats = bbt.beats;
int32_t ticks = bbt.ticks;
if ((bars ^ add.bars) < 0) {
/* signed-ness varies */
if (abs(add.bars) >= abs(bars)) {
/* addition will change which side of "zero" the answer is on;
adjust bbt.bars towards zero to deal with "unusual" BBT math
*/
if (bars < 0) {
bars++;
} else {
bars--;
}
}
}
if ((beats ^ add.beats) < 0) {
/* signed-ness varies */
if (abs (add.beats) >= abs (beats)) {
/* adjust bbt.beats towards zero to deal with "unusual" BBT math */
if (beats < 0) {
beats++;
} else {
beats--;
}
}
}
Temporal::BBT_Offset r (bars + add.bars, beats + add.beats, ticks + add.ticks);
/* ticks-per-bar-division; PPQN is ticks-per-quarter note */
const int32_t tpg = ticks_per_grid ();
if (r.ticks >= tpg) {
/* ticks per bar */
const int32_t tpb = tpg * _divisions_per_bar;
if (r.ticks >= tpb) {
r.bars += r.ticks / tpb;
r.ticks %= tpb;
}
if (r.ticks >= tpg) {
r.beats += r.ticks / tpg;
r.ticks %= tpg;
}
}
if (r.beats > _divisions_per_bar) {
/* adjust to zero-based math, since that's what C++ operators expect */
r.beats -= 1;
r.bars += r.beats / _divisions_per_bar;
r.beats %= _divisions_per_bar;
/* adjust back */
r.beats += 1;
}
if (r.bars == 0) {
r.bars = 1;
}
return Temporal::BBT_Time (r.bars, r.beats, r.ticks);
}
Temporal::BBT_Time
Meter::bbt_subtract (Temporal::BBT_Time const & bbt, Temporal::BBT_Offset const & sub) const
{
int32_t bars = bbt.bars;
int32_t beats = bbt.beats;
int32_t ticks = bbt.ticks;
if ((bars ^ sub.bars) < 0) {
/* signed-ness varies */
if (abs (sub.bars) >= abs (bars)) {
/* adjust bbt.bars towards zero to deal with "unusual" BBT math */
if (bars < 0) {
bars++;
} else {
bars--;
}
}
}
if ((beats ^ sub.beats) < 0) {
/* signed-ness varies */
if (abs (sub.beats) >= abs (beats)) {
/* adjust bbt.beats towards zero to deal with "unusual" BBT math */
if (beats < 0) {
beats++;
} else {
beats--;
}
}
}
Temporal::BBT_Offset r (bars - sub.bars, beats - sub.beats, ticks - sub.ticks);
/* ticks-per-bar-division; PPQN is ticks-per-quarter note */
const int32_t tpg = ticks_per_grid ();
if (r.ticks < 0) {
r.beats -= (r.ticks / tpg);
r.ticks = tpg + (r.ticks % Temporal::Beats::PPQN);
}
if (r.beats < 0) {
r.beats += 1;
r.bars -= r.beats / _divisions_per_bar;
r.beats = r.beats % _divisions_per_bar;
r.beats -= 1;
}
if (r.bars <= 0) {
r.bars -= 1;
}
return Temporal::BBT_Time (r.bars, r.beats, r.ticks);
}
Temporal::BBT_Time
Meter::round_to_bar (Temporal::BBT_Time const & bbt) const
{
Temporal::BBT_Time b = bbt.round_to_beat ();
if (b.beats > _divisions_per_bar/2) {
b.bars++;
}
b.beats = 1;
return b;
}
Temporal::BBT_Time
Meter::round_up_to_bar (Temporal::BBT_Time const & bbt) const
{
if (bbt.ticks == 0 && bbt.beats == 1) {
return bbt;
}
BBT_Time b = bbt.round_up_to_beat ();
if (b.beats > 1) {
b.bars += 1;
b.beats = 1;
}
return b;
}
Temporal::BBT_Time
Meter::round_down_to_bar (Temporal::BBT_Time const & bbt) const
{
if (bbt.ticks == 0 && bbt.beats == 1) {
return bbt;
}
BBT_Time b = bbt.round_down_to_beat ();
if (b.beats > 1) {
b.beats = 1;
}
return b;
}
Temporal::BBT_Time
Meter::round_up_to_beat (Temporal::BBT_Time const & bbt) const
{
Temporal::BBT_Time b = bbt.round_up_to_beat ();
if (b.beats > _divisions_per_bar) {
b.bars++;
b.beats = 1;
}
return b;
}
Temporal::Beats
Meter::to_quarters (Temporal::BBT_Offset const & offset) const
{
int64_t ticks = 0;
ticks += (Beats::PPQN * offset.bars * _divisions_per_bar * 4) / _note_value;
ticks += (Beats::PPQN * offset.beats * 4) / _note_value;
/* "parts per bar division" */
const int tpg = ticks_per_grid ();
if (offset.ticks > tpg) {
ticks += Beats::PPQN * offset.ticks / tpg;
ticks += offset.ticks % tpg;
} else {
ticks += offset.ticks;
}
return Beats (ticks/Beats::PPQN, ticks%Beats::PPQN);
}
int
TempoPoint::set_state (XMLNode const & node, int version)
{
int ret;
if ((ret = Tempo::set_state (node, version)) == 0) {
node.get_property (X_("omega"), _omega);
}
return ret;
}
XMLNode&
TempoPoint::get_state () const
{
XMLNode& base (Tempo::get_state());
Point::add_state (base);
base.set_property (X_("omega"), _omega);
return base;
}
TempoPoint::TempoPoint (TempoMap const & map, XMLNode const & node)
: Tempo (node)
, Point (map, node)
, _omega (0)
{
}
/* To understand the math(s) behind ramping, see the file doc/tempo.{pdf,tex}
*/
void
TempoPoint::compute_omega (samplecnt_t sr, superclock_t end_scpqn, Temporal::Beats const & quarter_duration)
{
if ((superclocks_per_quarter_note () == end_scpqn) || (_type == Constant)) {
_omega = 0.0;
return;
}
_omega = ((1.0/end_scpqn) - (1.0/superclocks_per_quarter_note())) / quarter_duration.to_double();
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("computed omega = %1%2 dur was %3\n", std::setprecision(12),_omega, quarter_duration.to_double()));
}
superclock_t
TempoPoint::superclock_at (Temporal::Beats const & qn) const
{
if (qn == _quarters) {
return _sclock;
}
if (!actually_ramped()) {
/* not ramped, use linear */
const superclock_t spqn = superclocks_per_quarter_note ();
return (spqn * qn.get_beats()) + int_div_round ((spqn * qn.get_ticks()), superclock_t (Temporal::ticks_per_beat));
}
return _sclock + llrint (log1p (superclocks_per_quarter_note() * _omega * (qn - _quarters).to_double()) / _omega);
}
superclock_t
TempoPoint::superclocks_per_note_type_at (timepos_t const &pos) const
{
if (!actually_ramped()) {
return _superclocks_per_note_type;
}
return _superclocks_per_note_type * exp (-_omega * pos.superclocks());
}
Temporal::Beats
TempoPoint::quarters_at (superclock_t sc) const
{
if (!actually_ramped()) {
/* convert sc into superbeats, given that sc represents some number of seconds */
const superclock_t whole_seconds = sc / superclock_ticks_per_second;
const superclock_t remainder = sc - (whole_seconds * superclock_ticks_per_second);
const superclock_t superbeats = ((_super_note_type_per_second/4) * whole_seconds) + int_div_round (superclock_t ((_super_note_type_per_second/4) * remainder), superclock_ticks_per_second);
/* convert superbeats to beats:ticks */
int32_t b;
int32_t t;
Tempo::superbeats_to_beats_ticks (superbeats, b, t);
return Beats (b, t);
}
const double b = (exp (_omega * (sc - _sclock)) - 1) / (superclocks_per_quarter_note() * _omega);
return _quarters + Beats::from_double (b);
}
MeterPoint::MeterPoint (TempoMap const & map, XMLNode const & node)
: Meter (node)
, Point (map, node)
{
}
/* Given a time in BBT_Time, compute the equivalent Beat Time.
*
* Computation assumes that the Meter is in effect at the time specified as
* BBT_Time (i.e. there is no other MeterPoint between this one and the specified
* time.
*/
Temporal::Beats
MeterPoint::quarters_at (Temporal::BBT_Time const & bbt) const
{
Temporal::BBT_Offset offset = bbt_delta (bbt, _bbt);
return _quarters + to_quarters (offset);
}
/* Given a time in Beats, compute the equivalent BBT Time.
*
* Computation assumes that the Meter is in effect at the time specified in
* Beats (i.e. there is no other MeterPoint between this one and the specified
* time.
*/
Temporal::BBT_Time
MeterPoint::bbt_at (Temporal::Beats const & qn) const
{
return bbt_add (_bbt, Temporal::BBT_Offset (0, 0, (qn - _quarters).to_ticks()));
}
XMLNode&
MeterPoint::get_state () const
{
XMLNode& base (Meter::get_state());
Point::add_state (base);
return base;
}
Temporal::BBT_Time
TempoMetric::bbt_at (superclock_t sc) const
{
const Beats dq = _tempo->quarters_at (sc) - _meter->beats();
const BBT_Offset bbt_offset (0, dq.get_beats(), dq.get_ticks());
return _meter->bbt_add (_meter->bbt(), bbt_offset);
}
superclock_t
TempoMetric::superclock_at (BBT_Time const & bbt) const
{
return _tempo->superclock_at (_meter->quarters_at (bbt));
}
MusicTimePoint::MusicTimePoint (TempoMap const & map, XMLNode const & node)
: Point (map, node)
{
}
XMLNode&
MusicTimePoint::get_state () const
{
XMLNode* node = new XMLNode (X_("MusicTime"));
Point::add_state (*node);
return *node;
}
void
TempoMapPoint::start_float ()
{
_floating = true;
}
void
TempoMapPoint::end_float ()
{
_floating = false;
}
/* TEMPOMAP */
TempoMap::TempoMap (Tempo const & initial_tempo, Meter const & initial_meter)
: _time_domain (AudioTime)
{
TempoPoint* tp = new TempoPoint (*this, initial_tempo, 0, Beats(), BBT_Time());
MeterPoint* mp = new MeterPoint (*this, initial_meter, 0, Beats(), BBT_Time());
MusicTimePoint* mtp = new MusicTimePoint (*this);
_tempos.push_back (*tp);
_meters.push_back (*mp);
_bartimes.push_back (*mtp);
_points.push_back (*tp);
_points.push_back (*mp);
_points.push_back (*mtp);
}
TempoMap::~TempoMap()
{
}
TempoMap::TempoMap (XMLNode const & node, int version)
{
set_state (node, version);
}
TempoMap::TempoMap (TempoMap const & other)
: _time_domain (other.time_domain())
{
#warning NUTEMPO since these lists are intrusive we must actually rebuild them
// _meters = other._meters;
// _bartimes = other._bartimes;
// _points = other._points;
// _tempos = other._tempos;
}
void
TempoMap::set_time_domain (TimeDomain td)
{
if (td == time_domain()) {
return;
}
#warning paul tempo_map::set_time_domain needs implementing
#if 0
switch (td) {
case AudioTime:
for (Tempos::iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
t->set_sclock (t->superclock_at (t->beats ()));
}
for (Meters::iterator m = _meters.begin(); m != _meters.end(); ++m) {
m->set_sclock (m->superclock_at (m->beats ()));
}
break;
default:
for (Tempos::iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
t->set_beats (t->quarters_at (t->sclock()));
}
for (Meters::iterator m = _meters.begin(); m != _meters.end(); ++m) {
m->set_beats (m->quarters_at (m->sclock()));
}
}
#endif
_time_domain = td;
}
MeterPoint*
TempoMap::add_meter (MeterPoint & mp)
{
/* CALLER MUST HOLD LOCK */
Meters::iterator m;
switch (time_domain()) {
case AudioTime:
for (m = _meters.begin(); m != _meters.end() && m->sclock() < mp.sclock(); ++m);
break;
case BeatTime:
for (m = _meters.begin(); m != _meters.end() && m->beats() < mp.beats(); ++m);
break;
case BarTime:
for (m = _meters.begin(); m != _meters.end() && m->bbt() < mp.bbt(); ++m);
break;
}
bool replaced = false;
MeterPoint* ret = 0;
if (m != _meters.end()) {
if (m->sclock() == mp.sclock()) {
/* overwrite Meter part of this point */
*((Meter*)&(*m)) = mp;
ret = &(*m);
replaced = true;
}
}
if (!replaced) {
ret = &(*(_meters.insert (m, mp)));
}
reset_starting_at (mp.sclock());
return ret;
}
void
TempoMap::change_tempo (TempoPoint & p, Tempo const & t)
{
*((Tempo*)&p) = t;
}
TempoPoint &
TempoMap::set_tempo (Tempo const & t, BBT_Time const & bbt)
{
return set_tempo (t, timepos_t (quarter_note_at (bbt)));
}
TempoPoint &
TempoMap::set_tempo (Tempo const & t, timepos_t const & time)
{
TempoPoint * ret;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("Set tempo @ %1 to %2\n", time, t));
if (time.is_beats()) {
/* tempo changes are required to be on-beat */
Beats on_beat = time.beats().round_to_beat();
superclock_t sc;
BBT_Time bbt;
TempoMetric metric (metric_at_locked (on_beat, false));
bbt = metric.bbt_at (on_beat);
sc = metric.superclock_at (on_beat);
TempoPoint tp (*this, t, sc, on_beat, bbt);
ret = add_tempo (tp);
} else {
Beats beats;
BBT_Time bbt;
superclock_t sc = time.superclocks();
TempoMetric tm (metric_at_locked (sc, false));
/* tempo changes must be on beat */
beats = tm.quarters_at (sc).round_to_beat ();
bbt = tm.bbt_at (beats);
/* recompute superclock position of rounded beat */
sc = tm.superclock_at (beats);
TempoPoint tp (*this, t, sc, beats, bbt);
ret = add_tempo (tp);
}
Changed ();
return *ret;
}
TempoPoint*
TempoMap::add_tempo (TempoPoint & tp)
{
/* CALLER MUST HOLD LOCK */
Tempos::iterator t;
switch (time_domain()) {
case AudioTime:
for (t = _tempos.begin(); t != _tempos.end() && t->sclock() < tp.sclock(); ++t);
break;
case BeatTime:
for (t = _tempos.begin(); t != _tempos.end() && t->beats() < tp.beats(); ++t);
break;
case BarTime:
for (t = _tempos.begin(); t != _tempos.end() && t->bbt() < tp.bbt(); ++t);
break;
}
bool replaced = false;
TempoPoint* ret = 0;
if (t != _tempos.end()) {
if (t->sclock() == tp.sclock()) {
/* overwrite Tempo part of this point */
*((Tempo*)&(*t)) = tp;
ret = &(*t);
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("overwrote old tempo with %1\n", tp));
replaced = true;
}
}
if (!replaced) {
t = _tempos.insert (t, tp);
ret = &*t;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("inserted tempo %1\n", tp));
}
/* t is guaranteed not to be _tempos.end() : it was either the
* TempoPoint we overwrote, or its the one we inserted.
*/
assert (t != _tempos.end());
Tempos::iterator nxt = t;
++nxt;
if (t->ramped() && nxt != _tempos.end()) {
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("compute ramp over %1 .. %2 aka %3 .. %4\n", t->sclock(), nxt->sclock(), t->beats(), nxt->beats()));
t->compute_omega (_thread_sample_rate, nxt->superclocks_per_quarter_note (), nxt->beats() - t->beats());
}
reset_starting_at (tp.sclock());
return ret;
}
void
TempoMap::remove_tempo (TempoPoint const & tp)
{
{
superclock_t sc (tp.sclock());
Tempos::iterator t;
for (t = _tempos.begin(); t != _tempos.end() && t->sclock() < tp.sclock(); ++t);
if (t->sclock() != tp.sclock()) {
/* error ... no tempo point at the time of tp */
return;
}
_tempos.erase (t);
reset_starting_at (sc);
}
Changed ();
}
MusicTimePoint &
TempoMap::set_bartime (BBT_Time const & bbt, timepos_t const & pos)
{
MusicTimePoint * ret;
assert (pos.time_domain() == AudioTime);
{
superclock_t sc (pos.superclocks());
TempoMetric metric (metric_at_locked (sc));
MusicTimePoint tp (bbt, Point (*this, sc, metric.quarters_at (sc), bbt));
ret = add_or_replace_bartime (tp);
}
Changed ();
return *ret;
}
MusicTimePoint*
TempoMap::add_or_replace_bartime (MusicTimePoint & tp)
{
/* CALLER MUST HOLD LOCK */
MusicTimes::iterator m;
for (m = _bartimes.begin(); m != _bartimes.end() && m->sclock() < tp.sclock(); ++m);
bool replaced = false;
MusicTimePoint* ret = 0;
if (m != _bartimes.end()) {
if (m->sclock() == tp.sclock()) {
/* overwrite the point with */
*m = tp;
ret = &(*m);
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("overwrote old bartime with %1\n", tp));
replaced = true;
}
}
if (!replaced) {
m = _bartimes.insert (m, tp);
ret = &*m;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("inserted bartime %1\n", tp));
}
/* m is guaranteed not to be _bartimes.end() : it was either the
* TempoPoint we overwrote, or its the one we inserted.
*/
assert (m != _bartimes.end());
reset_starting_at (tp.sclock());
return ret;
}
void
TempoMap::remove_bartime (MusicTimePoint const & tp)
{
{
superclock_t sc (tp.sclock());
MusicTimes::iterator m;
for (m = _bartimes.begin(); m != _bartimes.end() && m->sclock() < tp.sclock(); ++m);
if (m->sclock() != tp.sclock()) {
/* error ... no tempo point at the time of tp */
return;
}
_bartimes.erase (m);
reset_starting_at (sc);
}
Changed ();
}
void
TempoMap::reset_starting_at (superclock_t sc)
{
/* CALLER MUST HOLD LOCK */
Tempos::iterator t;
Meters::iterator m;
MusicTimes::iterator b;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("reset starting at %1\n", sc));
assert (!_tempos.empty());
assert (!_meters.empty());
TempoPoint* current_tempo = 0;
MeterPoint* current_meter = 0;
/* our task:
1) set t, m and b to the iterators for the tempo, meter and bartime
markers (if any) closest to but after @param sc.
2) set current_tempo and current_meter to point to the tempo and
meter in effect at @param sc
*/
if (sc) {
for (t = _tempos.begin(); t != _tempos.end() && t->sclock() <= sc; ++t) {
current_tempo = &*t;
}
for (m = _meters.begin(); m != _meters.end() && m->sclock() <= sc; ++m) {
current_meter = &*m;
}
for (b = _bartimes.begin(); b != _bartimes.end() && b->sclock() <= sc; ++b);
} else {
t = _tempos.begin();
m = _meters.begin();
b = _bartimes.begin();
current_meter = &*m;
current_tempo = &*t;
}
Tempos::iterator nxt_tempo = _tempos.begin();
while ((t != _tempos.end()) || (m != _meters.end()) || (b != _bartimes.end())) {
/* UPDATE RAMP COEFFICIENTS WHEN NECESSARY */
if (t->ramped() && (nxt_tempo != _tempos.begin()) && (nxt_tempo != _tempos.end())) {
t->compute_omega (_thread_sample_rate, nxt_tempo->superclocks_per_quarter_note (), nxt_tempo->beats() - t->beats());
}
/* figure out which of the 1, 2 or 3 possible iterators defines the next explicit point (we want the earliest on the timeline,
but there may be more than 1 at the same location).
*/
Point* first_of_three = 0;
superclock_t limit = INT64_MAX;
bool is_bartime = false;
if (m != _meters.end() && m->sclock() < limit) {
first_of_three = &*m;
limit = m->sclock();
}
if (t != _tempos.end() && t->sclock() < limit) {
first_of_three = &*t;
limit = t->sclock();
}
if (b != _bartimes.end() && b->sclock() < limit) {
first_of_three = &*b;
limit = b->sclock();
is_bartime = true;
}
assert (first_of_three);
/* Determine whether a tempo or meter or bartime point (or any combination thereof) is defining this new point */
bool advance_meter = false;
bool advance_tempo = false;
bool advance_bartime = false;
TempoMetric metric (*current_tempo, *current_meter);
if (m->sclock() == first_of_three->sclock()) {
advance_meter = true;
current_meter = &*m;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("\tcurrent point defines meter %1\n", *current_meter));
}
if (t->sclock() == first_of_three->sclock()) {
advance_tempo = true;
current_tempo = &*t;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("\tcurrent point defines tempo %1\n", *current_tempo));
}
if ((b != _bartimes.end()) && (b->sclock() == first_of_three->sclock())) {
advance_bartime = true;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("\tcurrent point defines bartime %1\n", *b));
}
if (!is_bartime) {
superclock_t sc = metric.superclock_at (first_of_three->bbt());
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("\tbased on %1 move to %2,%3\n", first_of_three->bbt(), sc, first_of_three->beats()));
first_of_three->set (sc, first_of_three->beats(), first_of_three->bbt());
} else {
}
if (advance_meter && (m != _meters.end())) {
++m;
}
if (advance_tempo && (t != _tempos.end())) {
++t;
nxt_tempo = t;
++nxt_tempo;
}
if (advance_bartime && (b != _bartimes.end())) {
++b;
}
}
DEBUG_TRACE (DEBUG::TemporalMap, "reset done\n");
#ifndef NDEBUG
if (DEBUG_ENABLED (DEBUG::TemporalMap)) {
dump_locked (cerr);
}
#endif
}
bool
TempoMap::move_meter (MeterPoint const & mp, timepos_t const & when, bool push)
{
{
assert (time_domain() != BarTime);
assert (!_tempos.empty());
assert (!_meters.empty());
if (_meters.size() < 2 || mp == _meters.front()) {
/* not movable */
return false;
}
superclock_t sc;
Beats beats;
BBT_Time bbt;
TimeDomain td (time_domain());
bool round_up;
switch (td) {
case AudioTime:
sc = when.superclocks();
if (sc > mp.sclock()) {
round_up = true;
} else {
round_up = false;
}
break;
case BeatTime:
beats = when.beats ();
if (beats > mp.beats ()) {
round_up = true;
} else {
round_up = false;
}
break;
}
/* Do not allow moving a meter marker to the same position as
* an existing one.
*/
Tempos::iterator t, prev_t;
Meters::iterator m, prev_m;
switch (time_domain()) {
case AudioTime: {
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->sclock() < sc; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->sclock() < sc && *m != mp; ++m) { prev_m = m; }
assert (prev_m != _meters.end());
if (prev_t == _tempos.end()) { prev_t = _tempos.begin(); }
TempoMetric metric (*prev_t, *prev_m);
bbt = metric.bbt_at (sc);
bbt = metric.meter().round_to_bar (bbt);
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->bbt() < bbt && *m != mp; ++m) {prev_m = m; }
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->bbt() < bbt; ++t) { prev_t = t; }
assert (prev_m != _meters.end());
if (prev_t == _tempos.end()) { prev_t = _tempos.begin(); }
metric = TempoMetric (*prev_t, *prev_m);
sc = metric.superclock_at (bbt);
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end(); ++m) {
if (&*m != &mp) {
if (m->sclock() == sc) {
return false;
}
}
}
beats = metric.quarters_at (bbt);
break;
}
case BeatTime: {
/* meter changes must be on bar */
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->beats() < beats; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->beats() < beats && *m != mp; ++m) { prev_m = m; }
assert (prev_m != _meters.end());
if (prev_t == _tempos.end()) { prev_t = _tempos.begin(); }
TempoMetric metric (*prev_t, *prev_m);
bbt = metric.bbt_at (beats);
if (round_up) {
bbt = metric.meter().round_up_to_bar (bbt);
} else {
bbt = metric.meter().round_down_to_bar (bbt);
}
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->bbt() < bbt; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->bbt() < bbt && *m != mp; ++m) { prev_m = m; }
assert (prev_m != _meters.end());
if (prev_t == _tempos.end()) { prev_t = _tempos.begin(); }
metric = TempoMetric (*prev_t, *prev_m);
beats = metric.quarters_at (bbt);
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end(); ++m) {
if (&*m != &mp) {
if (m->beats() == beats) {
return false;
}
}
}
sc = metric.superclock_at (bbt);
break;
}
default:
/* NOTREACHED */
return false;
}
if (mp.sclock() == sc && mp.beats() == beats && mp.bbt() == bbt) {
return false;
}
const superclock_t old_sc = mp.sclock();
Meters::iterator current = _meters.end();
Meters::iterator insert_before = _meters.end();
for (Meters::iterator m = _meters.begin(); m != _meters.end(); ++m) {
if (*m == mp) {
current = m;
}
if (insert_before == _meters.end() && (m->sclock() > sc)) {
insert_before = m;
}
}
/* existing meter must have been found */
assert (current != _meters.end());
/* reset position of this meter */
current->set (sc, beats, bbt);
/* reposition in list */
_meters.splice (insert_before, _meters, current);
/* recompute 3 domain positions for everything after this */
reset_starting_at (std::min (sc, old_sc));
}
Changed ();
return true;
}
bool
TempoMap::move_tempo (TempoPoint const & tp, timepos_t const & when, bool push)
{
{
assert (time_domain() != BarTime);
assert (!_tempos.empty());
assert (!_meters.empty());
if (_tempos.size() < 2 || tp == _tempos.front()) {
/* not movable */
return false;
}
superclock_t sc;
Beats beats;
BBT_Time bbt;
TimeDomain td (time_domain());
switch (td) {
case AudioTime:
sc = when.superclocks();
break;
case BeatTime:
beats = when.beats ();
break;
}
/* Do not allow moving a tempo marker to the same position as
* an existing one.
*/
Tempos::iterator t, prev_t;
Meters::iterator m, prev_m;
switch (time_domain()) {
case AudioTime: {
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->sclock() < sc && *t != tp; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->sclock() < sc; ++m) { prev_m = m; }
assert (prev_t != _tempos.end());
if (prev_m == _meters.end()) { prev_m = _meters.begin(); }
TempoMetric metric (*prev_t, *prev_m);
beats = metric.quarters_at (sc);
/* tempo changes must be on beat, so round and then
* recompute superclock and BBT with rounded result
*/
beats = beats.round_to_beat ();
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->sclock() < sc && *t != tp; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->sclock() < sc; ++m) { prev_m = m; }
assert (prev_t != _tempos.end());
if (prev_m == _meters.end()) { prev_m = _meters.begin(); }
metric = TempoMetric (*prev_t, *prev_m);
sc = metric.superclock_at (beats);
bbt = metric.bbt_at (beats);
break;
}
case BeatTime: {
/* tempo changes must be on beat */
beats = beats.round_to_beat ();
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->beats() < beats && *t != tp; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->beats() < beats; ++m) { prev_m = m; }
assert (prev_t != _tempos.end());
assert (prev_m != _meters.end());
TempoMetric metric (*prev_t, *prev_m);
sc = metric.superclock_at (beats);
bbt = metric.bbt_at (beats);
break;
}
default:
/* NOTREACHED */
return false;
}
if (tp.sclock() == sc && tp.beats() == beats && tp.bbt() == bbt) {
return false;
}
const superclock_t old_sc = tp.sclock();
Tempos::iterator current = _tempos.end();
Tempos::iterator insert_before = _tempos.end();
for (Tempos::iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
if (*t == tp) {
current = t;
}
if (insert_before == _tempos.end() && (t->sclock() > sc)) {
insert_before = t;
}
}
/* existing tempo must have been found */
assert (current != _tempos.end());
/* reset position of this tempo */
current->set (sc, beats, bbt);
/* reposition in list */
_tempos.splice (insert_before, _tempos, current);
/* Update ramp coefficients when necessary */
if (current->ramped() && insert_before != _tempos.end()) {
current->compute_omega (_thread_sample_rate, insert_before->superclocks_per_quarter_note (), insert_before->beats() - current->beats());
}
/* recompute 3 domain positions for everything after this */
reset_starting_at (std::min (sc, old_sc));
}
Changed ();
return true;
}
MeterPoint &
TempoMap::set_meter (Meter const & m, timepos_t const & time)
{
MeterPoint * ret = 0;
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("Set meter @ %1 to %2\n", time, m));
if (time.is_beats()) {
Beats beats (time.beats());
TempoMetric metric (metric_at_locked (beats));
/* meter changes are required to be on-bar */
BBT_Time rounded_bbt = metric.bbt_at (beats);
rounded_bbt = metric.round_to_bar (rounded_bbt);
const Beats rounded_beats = metric.quarters_at (rounded_bbt);
const superclock_t sc = metric.superclock_at (rounded_beats);
MeterPoint mp (*this, m, sc, rounded_beats, rounded_bbt);
ret = add_meter (mp);
} else {
superclock_t sc (time.superclocks());
Beats beats;
BBT_Time bbt;
TempoMetric metric (metric_at_locked (sc));
/* meter changes must be on bar */
bbt = metric.bbt_at (beats);
bbt = metric.round_to_bar (bbt);
/* compute beat position */
beats = metric.quarters_at (bbt);
/* recompute superclock position of bar-rounded position */
sc = metric.superclock_at (beats);
MeterPoint mp (*this, m, sc, beats, bbt);
ret = add_meter (mp);
}
Changed ();
return *ret;
}
MeterPoint &
TempoMap::set_meter (Meter const & t, BBT_Time const & bbt)
{
return set_meter (t, timepos_t (quarter_note_at (bbt)));
}
void
TempoMap::remove_meter (MeterPoint const & mp)
{
{
superclock_t sc = mp.sclock();
Meters::iterator m = std::upper_bound (_meters.begin(), _meters.end(), mp, Point::sclock_comparator());
if (m->sclock() != mp.sclock()) {
/* error ... no meter point at the time of mp */
return;
}
_meters.erase (m);
reset_starting_at (sc);
}
Changed ();
}
Temporal::BBT_Time
TempoMap::bbt_at (timepos_t const & pos) const
{
if (pos.is_beats()) {
return bbt_at (pos.beats());
}
return bbt_at (pos.superclocks());
}
Temporal::BBT_Time
TempoMap::bbt_at (superclock_t s) const
{
return metric_at_locked (s).bbt_at (s);
}
Temporal::BBT_Time
TempoMap::bbt_at (Temporal::Beats const & qn) const
{
return metric_at_locked (qn).bbt_at (qn);
}
#if 0
samplepos_t
TempoMap::sample_at (Temporal::Beats const & qn) const
{
return superclock_to_samples (metric_at_locked (qn).superclock_at (qn), _thread_sample_rate);
}
samplepos_t
TempoMap::sample_at (Temporal::BBT_Time const & bbt) const
{
return samples_to_superclock (metric_at_locked (bbt).superclock_at (bbt), _thread_sample_rate);
}
samplepos_t
TempoMap::sample_at (timepos_t const & pos) const
{
if (pos.is_beat()) {
return sample_at (pos.beats ());
}
/* somewhat nonsensical to call this under these conditions but ... */
return pos.superclocks();
}
#endif
superclock_t
TempoMap::superclock_at (Temporal::Beats const & qn) const
{
return metric_at_locked (qn).superclock_at (qn);
}
superclock_t
TempoMap::superclock_at (Temporal::BBT_Time const & bbt) const
{
return metric_at_locked (bbt).superclock_at (bbt);
}
superclock_t
TempoMap::superclock_at (timepos_t const & pos) const
{
if (pos.is_beats()) {
return superclock_at (pos.beats ());
}
/* somewhat nonsensical to call this under these conditions but ... */
return pos.superclocks();
}
superclock_t
TempoMap::superclock_plus_bbt (superclock_t pos, BBT_Time op) const
{
BBT_Time pos_bbt = bbt_at (pos);
pos_bbt.ticks += op.ticks;
if (pos_bbt.ticks >= ticks_per_beat) {
++pos_bbt.beats;
pos_bbt.ticks -= ticks_per_beat;
}
pos_bbt.beats += op.beats;
double divisions_per_bar = metric_at_locked (pos_bbt).divisions_per_bar();
while (pos_bbt.beats >= divisions_per_bar + 1) {
++pos_bbt.bars;
divisions_per_bar = metric_at_locked (pos_bbt).divisions_per_bar();
pos_bbt.beats -= divisions_per_bar;
}
pos_bbt.bars += op.bars;
return superclock_at (pos_bbt);
}
#define S2Sc(s) (samples_to_superclock ((s), _thread_sample_rate))
#define Sc2S(s) (superclock_to_samples ((s), _thread_sample_rate))
/** Count the number of beats that are equivalent to distance when going forward,
starting at pos.
*/
Temporal::Beats
TempoMap::scwalk_to_quarters (superclock_t pos, superclock_t distance) const
{
TempoMetric first (metric_at (pos));
TempoMetric last (metric_at (pos+distance));
Temporal::Beats a = first.quarters_at (pos);
Temporal::Beats b = last.quarters_at (pos+distance);
return b - a;
}
Temporal::Beats
TempoMap::scwalk_to_quarters (Temporal::Beats const & pos, superclock_t distance) const
{
/* XXX this converts from beats to superclock and back to beats... which is OK (reversible) */
superclock_t s = metric_at_locked (pos).superclock_at (pos);
s += distance;
return metric_at_locked (s).quarters_at (s);
}
Temporal::Beats
TempoMap::bbtwalk_to_quarters (Beats const & pos, BBT_Offset const & distance) const
{
return quarter_note_at (bbt_walk (bbt_at (pos), distance)) - pos;
}
void
TempoMap::sample_rate_changed (samplecnt_t new_sr)
{
const double ratio = new_sr / (double) _thread_sample_rate;
for (Tempos::iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
t->map_reset_set_sclock_for_sr_change (llrint (ratio * t->sclock()));
}
for (Meters::iterator m = _meters.begin(); m != _meters.end(); ++m) {
m->map_reset_set_sclock_for_sr_change (llrint (ratio * m->sclock()));
}
for (MusicTimes::iterator p = _bartimes.begin(); p != _bartimes.end(); ++p) {
p->map_reset_set_sclock_for_sr_change (llrint (ratio * p->sclock()));
}
}
void
TempoMap::dump (std::ostream& ostr) const
{
dump_locked (ostr);
}
void
TempoMap::dump_locked (std::ostream& ostr) const
{
for (Tempos::const_iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
ostr << &*t << ' ' << *t << endl;
}
for (Meters::const_iterator m = _meters.begin(); m != _meters.end(); ++m) {
ostr << &*m << ' ' << *m << endl;
}
}
void
TempoMap::get_grid (TempoMapPoints& ret, superclock_t start, superclock_t end, uint32_t bar_mod)
{
assert (!_tempos.empty());
assert (!_meters.empty());
DEBUG_TRACE (DEBUG::TemporalMap, string_compose (">>> GRID START %1 .. %2 (barmod = %3)\n", start, end, bar_mod))
Tempos::iterator t (_tempos.begin());
Meters::iterator m (_meters.begin());
MusicTimes::iterator b (_bartimes.begin());
TempoMetric metric = metric_at_locked (start, false);
BBT_Time bbt = metric.bbt_at (start);
#ifndef NDEBUG
/* Sanity Check */
if (DEBUG_ENABLED(PBD::DEBUG::TemporalMap)) {
TempoMetric emetric = metric_at_locked (end, false);
BBT_Time ebbt = metric_at_locked (end).bbt_at (end);
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("get grid between %1..%2 [ %4 .. %5 ] { %6 .. %7 } at bar_mod = %3\n",
start, end, bar_mod, start, end, bbt, ebbt));
if (metric.quarters_at (bbt).diff (metric.quarters_at (start)) > Beats::ticks (1)) {
cerr << "MM1: " << start << " / " << metric.quarters_at (start) << " vs. "
<< metric.superclock_at (bbt) << " / " << metric.quarters_at (bbt)
<< " delta "
<< start - metric.superclock_at (bbt)
<< " dB "
<< metric.quarters_at (bbt).diff (metric.quarters_at (start))
<< "\n\tused " << metric
<< endl;
abort ();
}
if (emetric.quarters_at (ebbt).diff (emetric.quarters_at (end)) > Beats::ticks (1)) {
cerr << "MM2: " << end << " / " << emetric.quarters_at (end) << " vs. "
<< emetric.superclock_at (ebbt) << " / " << emetric.quarters_at (ebbt)
<< " delta "
<< end - emetric.superclock_at (ebbt)
<< " dB "
<< emetric.quarters_at (ebbt).diff (emetric.quarters_at (end))
<< "\n\tused " << emetric
<< endl;
abort ();
}
dump (cerr);
}
#endif
/* first task: get to the right starting point for the requested
* grid. if bar_mod is zero, then we'll start on the next beat after
* @param start. if bar_mod is non-zero, we'll start on the first bar
* after @param start. This bar position may or may not be a part of the
* grid, depending on whether or not it is a multiple of bar_mod.
*/
if (bar_mod == 0) {
/* round to next beat, then find the tempo/meter/bartime points
* in effect at that time.
*/
bbt = metric.meter().round_up_to_beat (bbt);
for (Tempos::iterator tt = _tempos.begin(); tt != _tempos.end() && tt->sclock() < start; ++tt) { t = tt; }
for (Meters::iterator mm = _meters.begin(); mm != _meters.end() && mm->sclock() < start; ++mm) { m = mm; }
for (MusicTimes::iterator bb = _bartimes.begin(); bb != _bartimes.end() && bb->sclock() < start; ++bb) { b = bb; }
/* reset metric */
metric = TempoMetric (*t, *m);
/* recompute superclock position */
superclock_t new_start = metric.superclock_at (bbt);
if (new_start < start) {
abort ();
}
start = new_start;
} else {
/* this rounding cannot change the meter in effect, because it
remains within the bar. But it could change the tempo (which
are only quantized to grid positions within a bar).
*/
BBT_Time bar = bbt.round_down_to_bar ();
if (bar_mod != 1) {
bar.bars -= bar.bars % bar_mod;
++bar.bars;
}
bbt = bar;
for (Tempos::iterator tt = _tempos.begin(); tt != _tempos.end() && tt->bbt() < bbt; ++tt) { t = tt; }
for (Meters::iterator mm = _meters.begin(); mm != _meters.end() && mm->bbt() < bbt; ++mm) { m = mm; }
for (MusicTimes::iterator bb = _bartimes.begin(); bb != _bartimes.end() && bb->bbt() < bbt; ++bb) { b = bb; }
/* t, m and b are now all iterators for the tempo, meter and
* position markers BEFORE pos. b may be _bartimes.end(), but
* the other two are guaranteed to be valid references into
* the tempos and meters
*/
metric = TempoMetric (*t, *m);
start = metric.superclock_at (bbt);
}
/* advance t, m and b so that the point to the *next*
* tempo/meter/position marker (if any)
*/
Tempos::iterator nxt_t = t; ++nxt_t;
Meters::iterator nxt_m = m; ++nxt_m;
MusicTimes::iterator nxt_b = b; ++nxt_b;
/* at this point:
*
* - metric is a TempoMetric that describes the situation at pos
* - t, m and b reference tempo, meter and position markers at or prior to pos (if any)
* - nxt_t, nxt_m, nxt_b reference the tempo, meter and position markers after pos (if any)
*
* t and m must be valid; b, nxt_t, nxt_m, nxt_b may all refer to ::end() of their respective containers.
*/
/* outer loop: compute next marker position, if any, and then set limit to the earlier of that position or @param e.
* Then run the inner loop to actually add grid points up until limit. Repeat till done.
*/
while (start < end) {
bool advance_tempo = false;
bool advance_meter = false;
bool advance_bartime = false;
Point* first_of_three = 0;
superclock_t limit = INT64_MAX;
if (nxt_t != _tempos.end() && limit >= nxt_t->sclock()) {
first_of_three = &*nxt_t;
limit = first_of_three->sclock();
}
if (nxt_m != _meters.end() && limit >= nxt_m->sclock()) {
first_of_three = &*nxt_m;
limit = first_of_three->sclock();
}
if (nxt_b != _bartimes.end() && limit >= nxt_b->sclock()) {
first_of_three = &*nxt_b;
limit = first_of_three->sclock();
}
if (first_of_three) {
if (nxt_m != _meters.end() && nxt_m->sclock() == first_of_three->sclock()) {
advance_meter = true;
}
if (nxt_t != _tempos.end() && nxt_t->sclock() == first_of_three->sclock()) {
advance_tempo = true;
}
if ((nxt_b != _bartimes.end()) && (b->sclock() == first_of_three->sclock())) {
advance_bartime = true;
}
limit = std::min (end, first_of_three->sclock());
} else {
limit = end;
}
if (start >= limit) {
break;
}
/* Inner loop: add grid points until we hit limit, which is defined by either @param e or the next marker of some kind */
do {
/* we already have the superclock and BBT time for the next point, either computed before the loop, or at the bottom of this one.
* So now complete the triplet of (superclock,quarters,bbt)
*/
const Temporal::Beats beats = metric.quarters_at (start);
/* add point to grid */
ret.push_back (TempoMapPoint (*this, metric, start, beats, bbt));
DEBUG_TRACE (DEBUG::TemporalMap, string_compose ("G %1\t %2\n", metric, ret.back()));
/* Advance by the meter note value size */
superclock_t step;
if (bar_mod == 0) {
step = metric.superclocks_per_note_type_at_superclock (start);
start += step;
} else {
bbt.bars += bar_mod;
/* could have invalidated the current metric */
if (first_of_three && (bbt > first_of_three->bbt())) {
start = first_of_three->sclock();
break;
}
/* move superclock time forward to next (included) bar. Note that we know that metric is still
valid because we just checked above if we crossed a marker.
*/
start = metric.superclock_at (bbt);
}
if (start >= limit) {
/* go back to outer loop to advance iterators and get a new metric */
break;
}
if (bar_mod == 0) {
bbt = metric.bbt_at (start);
}
} while (true);
/* back in outer loop. Check to see if we passed a marker */
if (first_of_three && (start >= first_of_three->sclock())) {
if (advance_tempo) {
if (nxt_t != _tempos.end()) {
t = nxt_t;
++nxt_t;
}
}
if (advance_meter) {
if (nxt_m != _meters.end()) {
m = nxt_m;
++nxt_m;
}
}
if (advance_bartime) {
b = nxt_b;
if (nxt_b != _bartimes.end()) {
++nxt_b;
}
}
if (advance_tempo || advance_meter || advance_bartime) {
/* we overstepped a marker
* if bar_mod is zero, then by definition any
* such marker qualifies as a grid point.
*
* if bar_mod != zero, then check to see if the new
* BBT position matches the interval we've been asked
* for. If so, use it, otherwise just continue around
* the loop, using the new position and metric.
*/
bbt = first_of_three->bbt ();
if (bar_mod != 0) {
/* check to see if it matches the interval */
if (!bbt.is_bar() || (bbt.bars % bar_mod != 0)) {
/* not usable */
bbt = bbt.round_up_to_bar ();
/* reset iterators for new position */
for (Tempos::iterator tt = t; tt != _tempos.end() && tt->bbt() < bbt; ++tt) { t = tt; }
for (Meters::iterator mm = m; mm != _meters.end() && mm->bbt() < bbt; ++mm) { m = mm; }
for (MusicTimes::iterator bb = b; bb != _bartimes.end() && bb->bbt() < bbt; ++bb) { b = bb; }
nxt_t = t; ++nxt_t;
nxt_m = m; ++nxt_m;
nxt_b = b; ++nxt_b;
}
}
metric = TempoMetric (*t, *m);
start = metric.superclock_at (bbt);
/* ready to loop because metric, start and bbt are all set correctly, as they were when entering the outer loop */
}
}
}
DEBUG_TRACE (DEBUG::TemporalMap, "<<< GRID DONE\n");
}
std::ostream&
std::operator<<(std::ostream& str, Meter const & m)
{
return str << m.divisions_per_bar() << '/' << m.note_value();
}
std::ostream&
std::operator<<(std::ostream& str, Tempo const & t)
{
return str << t.note_types_per_minute() << " 1/" << t.note_type() << " notes per minute (" << t.superclocks_per_note_type() << " sc-per-1/" << t.note_type() << ')';
}
std::ostream&
std::operator<<(std::ostream& str, Point const & p)
{
return str << "P@" << p.sclock() << '/' << p.beats() << '/' << p.bbt();
}
std::ostream&
std::operator<<(std::ostream& str, MeterPoint const & m)
{
return str << *((Meter const *) &m) << ' ' << *((Point const *) &m);
}
std::ostream&
std::operator<<(std::ostream& str, TempoPoint const & t)
{
str << *((Tempo const *) &t) << ' ' << *((Point const *) &t);
if (t.ramped()) {
if (t.actually_ramped()) {
str << ' ' << " ramp to " << t.end_note_types_per_minute();
} else {
str << ' ' << " !ramp to " << t.end_note_types_per_minute();
}
str << " omega = " << std::setprecision(12) << t.omega();
}
return str;
}
std::ostream&
std::operator<<(std::ostream& str, TempoMetric const & tm)
{
return str << tm.tempo() << ' ' << tm.meter();
}
std::ostream&
std::operator<<(std::ostream& str, TempoMapPoint const & tmp)
{
str << '@' << std::setw (12) << tmp.sclock() << ' ' << tmp.sclock() / (double) superclock_ticks_per_second
<< (tmp.is_explicit_tempo() ? " EXP-T" : " imp-t")
<< (tmp.is_explicit_meter() ? " EXP-M" : " imp-m")
<< (tmp.is_explicit_position() ? " EXP-P" : " imp-p")
<< " qn " << tmp.beats ()
<< " bbt " << tmp.bbt()
;
if (tmp.is_explicit_tempo()) {
str << " tempo " << tmp.tempo();
}
if (tmp.is_explicit_meter()) {
str << " meter " << tmp.meter();
}
if (tmp.is_explicit_tempo() && tmp.tempo().ramped()) {
str << " ramp omega = " << tmp.tempo().omega();
}
return str;
}
superclock_t
TempoMap::superclock_plus_quarters_as_superclock (superclock_t start, Temporal::Beats const & distance) const
{
TempoMetric metric (metric_at_locked (start));
const Temporal::Beats start_qn = metric.quarters_at (start);
const Temporal::Beats end_qn = start_qn + distance;
TempoMetric end_metric (metric_at (end_qn));
return superclock_to_samples (end_metric.superclock_at (end_qn), _thread_sample_rate);
}
Temporal::Beats
TempoMap::superclock_delta_as_quarters (superclock_t start, superclock_t distance) const
{
return quarter_note_at (start + distance) - quarter_note_at (start);
}
Temporal::superclock_t
TempoMap::superclock_quarters_delta_as_superclock (superclock_t start, Temporal::Beats const & distance) const
{
Temporal::Beats start_qn = metric_at_locked (start).quarters_at (start);
start_qn += distance;
return metric_at_locked (start_qn).superclock_at (start_qn);
}
superclock_t
TempoMap::superclock_per_quarter_note_at (superclock_t pos) const
{
return metric_at_locked (pos).superclocks_per_quarter_note ();
}
BBT_Time
TempoMap::bbt_walk (BBT_Time const & bbt, BBT_Offset const & o) const
{
BBT_Offset offset (o);
Tempos::const_iterator t, prev_t, next_t;
Meters::const_iterator m, prev_m, next_m;
assert (!_tempos.empty());
assert (!_meters.empty());
/* trivial (and common) case: single tempo, single meter */
if (_tempos.size() == 1 && _meters.size() == 1) {
return _meters.front().bbt_add (bbt, o);
}
/* Find tempo,meter pair for bbt, and also for the next tempo and meter
* after each (if any)
*/
/* Yes, linear search because the typical size of _tempos and _meters
* is 1, and extreme sizes are on the order of 10
*/
next_t = _tempos.end();
next_m = _meters.end();
for (t = _tempos.begin(), prev_t = t; t != _tempos.end() && t->bbt() < bbt;) {
prev_t = t;
++t;
if (t != _tempos.end()) {
next_t = t;
++next_t;
}
}
for (m = _meters.begin(), prev_m = m; m != _meters.end() && m->bbt() < bbt;) {
prev_m = m;
++m;
if (m != _meters.end()) {
next_m = m;
++next_m;
}
}
/* may have found tempo and/or meter precisely at the tiem given */
if (t != _tempos.end() && t->bbt() == bbt) {
prev_t = t;
}
if (m != _meters.end() && m->bbt() == bbt) {
prev_m = m;
}
/* see ::metric_at_locked() for comments about the use of const_cast here
*/
TempoMetric metric (*const_cast<TempoPoint*>(&*prev_t), *const_cast<MeterPoint*>(&*prev_m));
superclock_t pos = metric.superclock_at (bbt);
/* normalize possibly too-large ticks count */
const int32_t tpg = metric.meter().ticks_per_grid ();
if (offset.ticks > tpg) {
/* normalize */
offset.beats += offset.ticks / tpg;
offset.ticks %= tpg;
}
/* add tick count, now guaranteed to be less than 1 grid unit */
if (offset.ticks) {
pos += metric.superclocks_per_ppqn () * offset.ticks;
}
/* add each beat, 1 by 1, rechecking to see if there's a new
* TempoMetric in effect after each addition
*/
#define TEMPO_CHECK_FOR_NEW_METRIC \
if (((next_t != _tempos.end()) && (pos >= next_t->sclock())) || \
((next_m != _meters.end()) && (pos >= next_m->sclock()))) { \
/* need new metric */ \
if (pos >= next_t->sclock()) { \
if (pos >= next_m->sclock()) { \
metric = TempoMetric (*const_cast<TempoPoint*>(&*next_t), *const_cast<MeterPoint*>(&*next_m)); \
++next_t; \
++next_m; \
} else { \
metric = TempoMetric (*const_cast<TempoPoint*>(&*next_t), metric.meter()); \
++next_t; \
} \
} else if (pos >= next_m->sclock()) { \
metric = TempoMetric (metric.tempo(), *const_cast<MeterPoint*>(&*next_m)); \
++next_m; \
} \
}
for (int32_t b = 0; b < offset.beats; ++b) {
TEMPO_CHECK_FOR_NEW_METRIC;
pos += metric.superclocks_per_grid (_thread_sample_rate);
}
/* add each bar, 1 by 1, rechecking to see if there's a new
* TempoMetric in effect after each addition
*/
for (int32_t b = 0; b < offset.bars; ++b) {
TEMPO_CHECK_FOR_NEW_METRIC;
pos += metric.superclocks_per_bar (_thread_sample_rate);
}
return metric.bbt_at (pos);
}
Temporal::Beats
TempoMap::quarter_note_at (timepos_t const & pos) const
{
if (pos.is_beats()) {
/* a bit redundant */
return pos.beats();
}
return quarter_note_at (pos);
}
Temporal::Beats
TempoMap::quarter_note_at (Temporal::BBT_Time const & bbt) const
{
return metric_at_locked (bbt).quarters_at (bbt);
}
Temporal::Beats
TempoMap::quarter_note_at (superclock_t pos) const
{
return metric_at_locked (pos).quarters_at (pos);
}
XMLNode&
TempoMap::get_state ()
{
XMLNode* node = new XMLNode (X_("TempoMap"));
node->set_property (X_("time-domain"), _time_domain);
node->set_property (X_("superclocks-per-second"), superclock_ticks_per_second);
XMLNode* children;
children = new XMLNode (X_("Tempos"));
node->add_child_nocopy (*children);
for (Tempos::const_iterator t = _tempos.begin(); t != _tempos.end(); ++t) {
children->add_child_nocopy (t->get_state());
}
children = new XMLNode (X_("Meters"));
node->add_child_nocopy (*children);
for (Meters::const_iterator m = _meters.begin(); m != _meters.end(); ++m) {
children->add_child_nocopy (m->get_state());
}
children = new XMLNode (X_("MusicTimes"));
node->add_child_nocopy (*children);
for (MusicTimes::const_iterator b = _bartimes.begin(); b != _bartimes.end(); ++b) {
children->add_child_nocopy (b->get_state());
}
return *node;
}
int
TempoMap::set_state (XMLNode const & node, int /*version*/)
{
{
/* global map properties */
/* XXX this should probably be at the global level in the session file because it affects a lot more than just the tempo map, potentially */
node.get_property (X_("superclocks-per-second"), superclock_ticks_per_second);
node.get_property (X_("time-domain"), _time_domain);
XMLNodeList const & children (node.children());
for (XMLNodeList::const_iterator c = children.begin(); c != children.end(); ++c) {
if ((*c)->name() == X_("Tempos")) {
if (set_tempos_from_state (**c)) {
return -1;
}
}
if ((*c)->name() == X_("Meters")) {
if (set_meters_from_state (**c)) {
return -1;
}
}
if ((*c)->name() == X_("MusicTimes")) {
if (set_music_times_from_state (**c)) {
return -1;
}
}
}
}
Changed ();
return 0;
}
int
TempoMap::set_music_times_from_state (XMLNode const& tempos_node)
{
return 0;
}
int
TempoMap::set_tempos_from_state (XMLNode const& tempos_node)
{
/* CALLER MUST HOLD LOCK */
XMLNodeList const & children (tempos_node.children());
try {
_tempos.clear ();
for (XMLNodeList::const_iterator c = children.begin(); c != children.end(); ++c) {
TempoPoint tp (*this, **c);
// _tempos.push_back (TempoPoint (*this, **c));
_tempos.push_back (tp);
}
} catch (...) {
_tempos.clear (); /* remove any that were created */
return -1;
}
return 0;
}
int
TempoMap::set_meters_from_state (XMLNode const& meters_node)
{
/* CALLER MUST HOLD LOCK */
XMLNodeList const & children (meters_node.children());
try {
_meters.clear ();
for (XMLNodeList::const_iterator c = children.begin(); c != children.end(); ++c) {
MeterPoint mp (*this, **c);
_meters.push_back (mp);
}
} catch (...) {
_meters.clear (); /* remove any that were created */
return -1;
}
return 0;
}
bool
TempoMap::can_remove (TempoPoint const & t) const
{
return !is_initial (t);
}
bool
TempoMap::is_initial (TempoPoint const & t) const
{
return t.sclock() == 0;
}
bool
TempoMap::is_initial (MeterPoint const & m) const
{
return m.sclock() == 0;
}
bool
TempoMap::can_remove (MeterPoint const & m) const
{
return !is_initial (m);
}
/** returns the duration (using the domain of @param pos) of the supplied BBT time at a specified sample position in the tempo map.
* @param pos the frame position in the tempo map.
* @param bbt the distance in BBT time from pos to calculate.
* @param dir the rounding direction..
* @return the timecnt_t that @param bbt represents when starting at @param pos, in
* the time domain of @param pos
*/
timecnt_t
TempoMap::bbt_duration_at (timepos_t const & pos, BBT_Offset const & dur) const
{
if (pos.time_domain() == AudioTime) {
return timecnt_t::from_superclock (superclock_at (bbt_walk (bbt_at (pos), dur)) - pos.superclocks(), pos);
}
return timecnt_t (bbtwalk_to_quarters (pos.beats(), dur) - pos.beats(), pos);
}
/** Takes a duration (in any time domain) and considers it as a distance from the given position.
* Returns a distance in the requested domain, taking tempo changes into account.
*
* Obviously, if the given distance is in the same time domain as the requested domain,
* the returned distance is identical to the given one.
*/
timecnt_t
TempoMap::full_duration_at (timepos_t const & pos, timecnt_t const & duration, TimeDomain return_domain) const
{
timepos_t p (return_domain);
Beats b;
superclock_t s;
assert (pos.time_domain() != BarTime);
assert (duration.time_domain() != BarTime);
assert (return_domain != BarTime);
if (return_domain == duration.time_domain()) {
return duration;
}
switch (return_domain) {
case AudioTime:
switch (duration.time_domain()) {
case AudioTime:
/*NOTREACHED*/
break;
case BeatTime:
/* duration is in beats but we're asked to return superclocks */
switch (pos.time_domain()) {
case BeatTime:
/* pos is already in beats */
p = pos;
break;
case AudioTime:
/* Determine beats at sc pos, so that we can add beats */
p = metric_at (pos).quarters_at (pos.superclocks());
break;
}
/* add beats */
p += duration;
/* determine superclocks */
s = metric_at (p).superclock_at (p.beats());
/* return duration in sc */
return timecnt_t::from_superclock (s - pos.superclocks(), pos);
break;
}
break;
case BeatTime:
switch (duration.time_domain()) {
case AudioTime:
/* duration is in superclocks but we're asked to return beats */
switch (pos.time_domain ()) {
case AudioTime:
/* pos is already in superclocks */
p = pos;
break;
case BeatTime:
/* determined sc at beat position so we can add superclocks */
p = metric_at (pos).superclock_at (pos.beats());
break;
}
/* add superclocks */
p += duration;
/* determine beats */
b = metric_at (p).quarters_at (p.superclocks());
/* return duration in beats */
return timecnt_t (b - pos.beats(), pos);
break;
case BeatTime:
/*NOTREACHED*/
break;
}
break;
}
/*NOTREACHED*/
abort ();
/*NOTREACHED*/
return timecnt_t::from_superclock (0);
}
Tempo const *
TempoMap::next_tempo (Tempo const & t) const
{
Tempos::const_iterator p = _tempos.begin();
while (p != _tempos.end()) {
if (&t == &*p) {
break;
}
++p;
}
if (p != _tempos.end()) {
++p;
if (p != _tempos.end()) {
return &*p;;
}
}
return 0;
}
uint32_t
TempoMap::n_meters () const
{
return _meters.size();
}
uint32_t
TempoMap::n_tempos () const
{
return _tempos.size();
}
void
TempoMap::insert_time (timepos_t const & pos, timecnt_t const & duration)
{
assert (time_domain() != BarTime);
assert (!_tempos.empty());
assert (!_meters.empty());
if (pos == std::numeric_limits<timepos_t>::min()) {
/* can't insert time at the front of the map: those entries are fixed */
return;
}
{
Tempos::iterator t (_tempos.begin());
Meters::iterator m (_meters.begin());
MusicTimes::iterator b (_bartimes.begin());
TempoPoint current_tempo = *t;
MeterPoint current_meter = *m;
MusicTimePoint current_time_point (*this);
if (_bartimes.size() > 0) {
current_time_point = *b;
}
superclock_t sc;
Beats beats;
BBT_Time bbt;
/* set these to true so that we set current_* on our first pass
* through the while loop(s)
*/
bool moved_tempo = true;
bool moved_meter = true;
bool moved_bartime = true;
switch (duration.time_domain()) {
case AudioTime:
sc = pos.superclocks();
/* handle a common case quickly */
if ((_tempos.size() < 2 || sc > _tempos.back().sclock()) &&
(_meters.size() < 2 || sc > _meters.back().sclock()) &&
(_bartimes.size() < 2 || (_bartimes.empty() || sc > _bartimes.back().sclock()))) {
/* only one tempo, plus one meter and zero or
one bartimes, or insertion point is after last
item. nothing to do here.
*/
return;
}
/* advance fundamental iterators to correct position */
while (t != _tempos.end() && t->sclock() < sc) ++t;
while (m != _meters.end() && m->sclock() < sc) ++m;
while (b != _bartimes.end() && b->sclock() < sc) ++b;
while (t != _tempos.end() && m != _meters.end() && b != _bartimes.end()) {
if (moved_tempo && t != _tempos.end()) {
current_tempo = *t;
moved_tempo = false;
}
if (moved_meter && m != _meters.end()) {
current_meter = *m;
moved_meter = false;
}
if (moved_bartime && b != _bartimes.end()) {
current_time_point = *b;
moved_bartime = false;
}
/* for each of t, m and b:
if the point is earlier than the other two,
recompute the superclock, beat and bbt
positions, and reset the point.
*/
if (t->sclock() < m->sclock() && t->sclock() < b->sclock()) {
sc = t->sclock() + duration.superclocks();
beats = current_tempo.quarters_at (sc);
/* round tempo to beats */
beats = beats.round_to_beat ();
sc = current_tempo.superclock_at (beats);
bbt = current_meter.bbt_at (beats);
t->set (sc, beats, bbt);
++t;
moved_tempo = true;
}
if (m->sclock() < t->sclock() && m->sclock() < b->sclock()) {
sc = m->sclock() + duration.superclocks();
beats = current_tempo.quarters_at (sc);
/* round meter to bars */
bbt = current_meter.bbt_at (beats);
beats = current_meter.quarters_at (current_meter.round_to_bar(bbt));
/* recompute */
sc = current_tempo.superclock_at (beats);
m->set (sc, beats, bbt);
++m;
moved_meter = true;
}
if (b->sclock() < t->sclock() && b->sclock() < m->sclock()) {
sc = b->sclock() + duration.superclocks();
beats = current_tempo.quarters_at (sc);
/* round bartime to beats */
beats = beats.round_to_beat();
sc = current_tempo.superclock_at (beats);
bbt = current_meter.bbt_at (beats);
m->set (sc, beats, bbt);
++m;
moved_meter = true;
}
}
break;
case BeatTime:
break;
}
}
Changed ();
}
bool
TempoMap::remove_time (timepos_t const & pos, timecnt_t const & duration)
{
bool moved = false;
if (moved) {
Changed ();
}
return moved;
}
TempoPoint const *
TempoMap::previous_tempo (TempoPoint const & point) const
{
Tempos::const_iterator t = _tempos.begin();
Tempos::const_iterator prev = _tempos.end();
while (t != _tempos.end()) {
if (t->sclock() == point.sclock()) {
if (prev != _tempos.end()) {
return &*prev;
}
}
prev = t;
++t;
}
return 0;
}
TempoMetric
TempoMap::metric_at (timepos_t const & pos) const
{
if (pos.is_beats()) {
return metric_at (pos.beats());
}
return metric_at (pos.superclocks());
}
TempoMetric
TempoMap::metric_at (superclock_t s) const
{
return metric_at_locked (s);
}
TempoMetric
TempoMap::metric_at (Beats const & b) const
{
return metric_at_locked (b);
}
TempoMetric
TempoMap::metric_at (BBT_Time const & bbt) const
{
return metric_at_locked (bbt);
}
TempoMetric
TempoMap::metric_at_locked (superclock_t sc, bool can_match) const
{
Tempos::const_iterator t, prev_t;
Meters::const_iterator m, prev_m;
assert (!_tempos.empty());
assert (!_meters.empty());
/* Yes, linear search because the typical size of _tempos and _meters
* is 1, and extreme sizes are on the order of 10
*/
for (t = _tempos.begin(), prev_t = t; t != _tempos.end() && t->sclock() < sc; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = m; m != _meters.end() && m->sclock() < sc; ++m) { prev_m = m; }
if (can_match || sc == 0) {
/* may have found tempo and/or meter precisely at @param sc */
if (t != _tempos.end() && t->sclock() == sc) {
prev_t = t;
}
if (m != _meters.end() && m->sclock() == sc) {
prev_m = m;
}
}
/* I hate doing this const_cast<>, but making this method non-const
* propagates into everything that just calls metric_at(), and that's a
* bit ridiculous. Yes, the TempoMetric returned here can be used to
* change the map, and that's bad, but the non-const propagation is
* worse.
*/
return TempoMetric (*const_cast<TempoPoint*>(&*prev_t), *const_cast<MeterPoint*> (&*prev_m));
}
TempoMetric
TempoMap::metric_at_locked (Beats const & b, bool can_match) const
{
Tempos::const_iterator t, prev_t;
Meters::const_iterator m, prev_m;
assert (!_tempos.empty());
assert (!_meters.empty());
/* Yes, linear search because the typical size of _tempos and _meters
* is 1, and extreme sizes are on the order of 10
*/
for (t = _tempos.begin(), prev_t = t; t != _tempos.end() && t->beats() < b; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = m; m != _meters.end() && m->beats() < b; ++m) { prev_m = m; }
if (can_match || b == Beats()) {
/* may have found tempo and/or meter precisely at @param b */
if (t != _tempos.end() && t->beats() == b) {
prev_t = t;
}
if (m != _meters.end() && m->beats() == b) {
prev_m = m;
}
}
/* I hate doing this const_cast<>, but making this method non-const
* propagates into everything that just calls metric_at(), and that's a
* bit ridiculous. Yes, the TempoMetric returned here can be used to
* change the map, and that's bad, but the non-const propagation is
* worse.
*/
return TempoMetric (*const_cast<TempoPoint*>(&*prev_t), *const_cast<MeterPoint*> (&*prev_m));
}
TempoMetric
TempoMap::metric_at_locked (BBT_Time const & bbt, bool can_match) const
{
Tempos::const_iterator t, prev_t;
Meters::const_iterator m, prev_m;
assert (!_tempos.empty());
assert (!_meters.empty());
/* Yes, linear search because the typical size of _tempos and _meters
* is 1, and extreme sizes are on the order of 10
*/
for (t = _tempos.begin(), prev_t = t; t != _tempos.end() && t->bbt() < bbt; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = m; m != _meters.end() && m->bbt() < bbt; ++m) { prev_m = m; }
if (can_match || bbt == BBT_Time()) {
/* may have found tempo and/or meter precisely at @param bbt */
if (t != _tempos.end() && t->bbt() == bbt) {
prev_t = t;
}
if (m != _meters.end() && m->bbt() == bbt) {
prev_m = m;
}
}
/* I hate doing this const_cast<>, but making this method non-const
* propagates into everything that just calls metric_at(), and that's a
* bit ridiculous. Yes, the TempoMetric returned here can be used to
* change the map, and that's bad, but the non-const propagation is
* worse.
*/
return TempoMetric (*const_cast<TempoPoint*>(&*prev_t), *const_cast<MeterPoint*> (&*prev_m));
}
bool
TempoMap::set_ramped (TempoPoint & tp, bool yn)
{
Rampable & r (tp);
bool ret = r.set_ramped (yn);
if (ret) {
reset_starting_at (tp.sclock());
}
return ret;
}
#if 0
bool
TempoMap::twist_tempi (TempoSection* ts, const Tempo& bpm, const framepos_t frame, const framepos_t end_frame)
{
TempoSection* next_t = 0;
TempoSection* next_to_next_t = 0;
Metrics future_map;
bool can_solve = false;
/* minimum allowed measurement distance in frames */
framepos_t const min_dframe = 2;
{
if (!ts) {
return false;
}
TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
TempoSection* prev_to_prev_t = 0;
const frameoffset_t fr_off = end_frame - frame;
if (!tempo_copy) {
return false;
}
if (tempo_copy->pulse() > 0.0) {
prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_minute_locked (future_map, minute_at_frame (tempo_copy->frame() - 1)));
}
for (Metrics::const_iterator i = future_map.begin(); i != future_map.end(); ++i) {
if ((*i)->is_tempo() && (*i)->minute() > tempo_copy->minute()) {
next_t = static_cast<TempoSection*> (*i);
break;
}
}
if (!next_t) {
return false;
}
for (Metrics::const_iterator i = future_map.begin(); i != future_map.end(); ++i) {
if ((*i)->is_tempo() && (*i)->minute() > next_t->minute()) {
next_to_next_t = static_cast<TempoSection*> (*i);
break;
}
}
if (!next_to_next_t) {
return false;
}
double prev_contribution = 0.0;
if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
prev_contribution = (tempo_copy->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
}
const frameoffset_t tempo_copy_frame_contribution = fr_off - (prev_contribution * (double) fr_off);
framepos_t old_tc_minute = tempo_copy->minute();
double old_next_minute = next_t->minute();
double old_next_to_next_minute = next_to_next_t->minute();
double new_bpm;
double new_next_bpm;
double new_copy_end_bpm;
if (frame > tempo_copy->frame() + min_dframe && (frame + tempo_copy_frame_contribution) > tempo_copy->frame() + min_dframe) {
new_bpm = tempo_copy->note_types_per_minute() * ((frame - tempo_copy->frame())
/ (double) (end_frame - tempo_copy->frame()));
} else {
new_bpm = tempo_copy->note_types_per_minute();
}
/* don't clamp and proceed here.
testing has revealed that this can go negative,
which is an entirely different thing to just being too low.
*/
if (new_bpm < 0.5) {
return false;
}
new_bpm = min (new_bpm, (double) 1000.0);
tempo_copy->set_note_types_per_minute (new_bpm);
if (tempo_copy->type() == TempoSection::Constant) {
tempo_copy->set_end_note_types_per_minute (new_bpm);
}
recompute_tempi (future_map);
if (check_solved (future_map)) {
if (!next_t) {
return false;
}
ts->set_note_types_per_minute (new_bpm);
if (ts->type() == TempoSection::Constant) {
ts->set_end_note_types_per_minute (new_bpm);
}
recompute_map (_metrics);
can_solve = true;
}
if (next_t->type() == TempoSection::Constant || next_t->c() == 0.0) {
if (frame > tempo_copy->frame() + min_dframe && end_frame > tempo_copy->frame() + min_dframe) {
new_next_bpm = next_t->note_types_per_minute() * ((next_to_next_t->minute() - old_next_minute)
/ (double) ((old_next_to_next_minute) - old_next_minute));
} else {
new_next_bpm = next_t->note_types_per_minute();
}
next_t->set_note_types_per_minute (new_next_bpm);
recompute_tempi (future_map);
if (check_solved (future_map)) {
for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
if ((*i)->is_tempo() && (*i)->minute() > ts->minute()) {
next_t = static_cast<TempoSection*> (*i);
break;
}
}
if (!next_t) {
return false;
}
next_t->set_note_types_per_minute (new_next_bpm);
recompute_map (_metrics);
can_solve = true;
}
} else {
double next_frame_ratio = 1.0;
double copy_frame_ratio = 1.0;
if (next_to_next_t) {
next_frame_ratio = (next_to_next_t->minute() - old_next_minute) / (old_next_to_next_minute - old_next_minute);
copy_frame_ratio = ((old_tc_minute - next_t->minute()) / (double) (old_tc_minute - old_next_minute));
}
new_next_bpm = next_t->note_types_per_minute() * next_frame_ratio;
new_copy_end_bpm = tempo_copy->end_note_types_per_minute() * copy_frame_ratio;
tempo_copy->set_end_note_types_per_minute (new_copy_end_bpm);
if (next_t->clamped()) {
next_t->set_note_types_per_minute (new_copy_end_bpm);
} else {
next_t->set_note_types_per_minute (new_next_bpm);
}
recompute_tempi (future_map);
if (check_solved (future_map)) {
for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
if ((*i)->is_tempo() && (*i)->minute() > ts->minute()) {
next_t = static_cast<TempoSection*> (*i);
break;
}
}
if (!next_t) {
return false;
}
if (next_t->clamped()) {
next_t->set_note_types_per_minute (new_copy_end_bpm);
} else {
next_t->set_note_types_per_minute (new_next_bpm);
}
ts->set_end_note_types_per_minute (new_copy_end_bpm);
recompute_map (_metrics);
can_solve = true;
}
}
}
Metrics::const_iterator d = future_map.begin();
while (d != future_map.end()) {
delete (*d);
++d;
}
MetricPositionChanged (PropertyChange ()); // Emit Signal
return can_solve;
}
#endif
void
TempoMap::MementoBinder::set_state (XMLNode const & node, int version) const
{
/* fetch a writable copy of this thread's tempo map */
TempoMap::SharedPtr map (write_copy());
/* change the state of the copy */
map->set_state (node, version);
/* do the update step of RCU */
update (map);
/* now update this thread's view of the current tempo map */
fetch ();
}
void
TempoMap::init ()
{
SharedPtr new_map (new TempoMap (Tempo (120), Meter (4, 4)));
_map_mgr.init (new_map);
fetch ();
}
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