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Tempo ramps - first stab at metric marks locked to frames or beats.

Browse source 
- pretty much untested.
This commit is contained in:
nick_m 2016-02-28 04:59:34 +11:00
parent d8549c6ff5
commit bc42dea451
6 changed files with 404 additions and 62 deletions
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37
gtk2_ardour/editor_drag.cc
View file

@ -3210,7 +3210,13 @@ MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
if (_copy == true) {
_editor->begin_reversible_command (_("copy meter mark"));
XMLNode &before = map.get_state();
map.add_meter (_marker->meter(), map.beat_at_frame (_marker->position()), when);
if (_marker->meter().position_lock_style() == AudioTime) {
map.add_meter (_marker->meter(), _marker->position());
} else {
map.add_meter (_marker->meter(), map.bbt_to_beats (when), when);
}
XMLNode &after = map.get_state();
_editor->session()->add_command(new MementoCommand<TempoMap>(map, &before, &after));
_editor->commit_reversible_command ();
@ -3219,8 +3225,12 @@ MeterMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
_editor->begin_reversible_command (_("move meter mark"));
/* we removed it before, so add it back now */
if (_marker->meter().position_lock_style() == AudioTime) {
map.add_meter (_marker->meter(), _marker->position());
} else {
map.add_meter (_marker->meter(), map.beat_at_frame (_marker->position()), when);
}
map.add_meter (_marker->meter(), map.beat_at_frame (_marker->position()), when);
XMLNode &after = map.get_state();
_editor->session()->add_command(new MementoCommand<TempoMap>(map, before_state, &after));
_editor->commit_reversible_command ();
@ -3336,21 +3346,32 @@ TempoMarkerDrag::finished (GdkEvent* event, bool movement_occurred)
return;
}
motion (event, false);
//motion (event, false);
TempoMap& map (_editor->session()->tempo_map());
if (_copy == true) {
_editor->begin_reversible_command (_("copy tempo mark"));
XMLNode &before = map.get_state();
map.add_tempo (_marker->tempo(), _real_section->beat(), _marker->tempo().type());
if (_marker->tempo().position_lock_style() == MusicTime) {
map.add_tempo (_marker->tempo(), _real_section->beat(), _marker->tempo().type());
} else {
map.add_tempo (_marker->tempo(), _real_section->frame(), _marker->tempo().type());
}
XMLNode &after = map.get_state();
_editor->session()->add_command (new MementoCommand<TempoMap>(map, &before, &after));
_editor->commit_reversible_command ();
} else {
/* we removed it before, so add it back now */
map.replace_tempo (*_real_section, _marker->tempo().beats_per_minute() , _real_section->beat(), _marker->tempo().type());
if (_marker->tempo().position_lock_style() == MusicTime) {
map.replace_tempo (*_real_section, _marker->tempo().beats_per_minute() , _real_section->beat(), _marker->tempo().type());
} else {
map.replace_tempo (*_real_section, _marker->tempo().beats_per_minute() , _real_section->frame(), _marker->tempo().type());
}
XMLNode &after = map.get_state();
_editor->session()->add_command (new MementoCommand<TempoMap>(map, before_state, &after));
_editor->commit_reversible_command ();
@ -3368,7 +3389,11 @@ TempoMarkerDrag::aborted (bool moved)
if (moved) {
TempoMap& map (_editor->session()->tempo_map());
/* we removed it before, so add it back now */
map.add_tempo (_marker->tempo(), _marker->tempo().beat(), _marker->tempo().type());
if (_marker->tempo().position_lock_style() == MusicTime) {
map.add_tempo (_marker->tempo(), _marker->tempo().beat(), _marker->tempo().type());
} else {
map.add_tempo (_marker->tempo(), _marker->tempo().frame(), _marker->tempo().type());
}
// delete the dummy marker we used for visual representation while moving.
// a new visual marker will show up automatically.
delete _marker;

31
gtk2_ardour/editor_tempodisplay.cc
View file

@ -238,16 +238,18 @@ Editor::mouse_add_new_tempo_event (framepos_t frame)
double bpm = 0;
Timecode::BBT_Time requested;
bpm = tempo_dialog.get_bpm ();
double nt = tempo_dialog.get_note_type();
bpm = max (0.01, bpm);
tempo_dialog.get_bbt_time (requested);
begin_reversible_command (_("add tempo mark"));
XMLNode &before = map.get_state();
map.add_tempo (Tempo (bpm,nt), map.bbt_to_beats (requested), tempo_dialog.get_tempo_type());
if (tempo_dialog.get_lock_style() == MusicTime) {
map.add_tempo (Tempo (bpm,nt), map.bbt_to_beats (requested), tempo_dialog.get_tempo_type());
} else {
map.add_tempo (Tempo (bpm,nt), frame, tempo_dialog.get_tempo_type());
}
XMLNode &after = map.get_state();
_session->add_command(new MementoCommand<TempoMap>(map, &before, &after));
commit_reversible_command ();
@ -286,7 +288,11 @@ Editor::mouse_add_new_meter_event (framepos_t frame)
begin_reversible_command (_("add meter mark"));
XMLNode &before = map.get_state();
map.add_meter (Meter (bpb, note_type), map.bbt_to_beats (requested), requested);
if (meter_dialog.get_lock_style() == MusicTime) {
map.add_meter (Meter (bpb, note_type), map.bbt_to_beats (requested), requested);
} else {
map.add_meter (Meter (bpb, note_type), frame, meter_dialog.get_lock_style());
}
_session->add_command(new MementoCommand<TempoMap>(map, &before, &map.get_state()));
commit_reversible_command ();
@ -330,13 +336,17 @@ Editor::edit_meter_section (MeterSection* section)
bpb = max (1.0, bpb); // XXX is this a reasonable limit?
double note_type = meter_dialog.get_note_type ();
Timecode::BBT_Time when;
meter_dialog.get_bbt_time(when);
framepos_t const frame = _session->tempo_map().frame_at_beat (_session->tempo_map().bbt_to_beats (when));
begin_reversible_command (_("replace tempo mark"));
XMLNode &before = _session->tempo_map().get_state();
_session->tempo_map().replace_meter (*section, Meter (bpb, note_type), when);
if (meter_dialog.get_lock_style() == MusicTime) {
_session->tempo_map().replace_meter (*section, Meter (bpb, note_type), when);
} else {
_session->tempo_map().replace_meter (*section, Meter (bpb, note_type), frame);
}
XMLNode &after = _session->tempo_map().get_state();
_session->add_command(new MementoCommand<TempoMap>(_session->tempo_map(), &before, &after));
commit_reversible_command ();
@ -356,13 +366,20 @@ Editor::edit_tempo_section (TempoSection* section)
double bpm = tempo_dialog.get_bpm ();
double nt = tempo_dialog.get_note_type ();
double beat;
Timecode::BBT_Time when;
tempo_dialog.get_bbt_time(when);
bpm = max (0.01, bpm);
beat = _session->tempo_map().bbt_to_beats (when);
begin_reversible_command (_("replace tempo mark"));
XMLNode &before = _session->tempo_map().get_state();
_session->tempo_map().replace_tempo (*section, Tempo (bpm, nt), _session->tempo_map().bbt_to_beats (when), tempo_dialog.get_tempo_type());
if (tempo_dialog.get_lock_style() == MusicTime) {
_session->tempo_map().replace_tempo (*section, Tempo (bpm, nt), beat, tempo_dialog.get_tempo_type());
} else {
_session->tempo_map().replace_tempo (*section, Tempo (bpm, nt), _session->tempo_map().frame_at_beat (beat), tempo_dialog.get_tempo_type());
}
XMLNode &after = _session->tempo_map().get_state();
_session->add_command (new MementoCommand<TempoMap>(_session->tempo_map(), &before, &after));
commit_reversible_command ();

107
gtk2_ardour/tempo_dialog.cc
View file

@ -47,7 +47,7 @@ TempoDialog::TempoDialog (TempoMap& map, framepos_t frame, const string&)
Tempo tempo (map.tempo_at (frame));
map.bbt_time (frame, when);
init (when, tempo.beats_per_minute(), tempo.note_type(), TempoSection::Constant, true);
init (when, tempo.beats_per_minute(), tempo.note_type(), TempoSection::Constant, true, PositionLockStyle::MusicTime);
}
TempoDialog::TempoDialog (TempoMap& map, TempoSection& section, const string&)
@ -61,11 +61,11 @@ TempoDialog::TempoDialog (TempoMap& map, TempoSection& section, const string&)
{
Timecode::BBT_Time when;
map.bbt_time (map.frame_at_beat (section.beat()), when);
init (when, section.beats_per_minute(), section.note_type(), section.type(), section.movable());
init (when, section.beats_per_minute(), section.note_type(), section.type(), section.movable(), section.position_lock_style());
}
void
TempoDialog::init (const Timecode::BBT_Time& when, double bpm, double note_type, TempoSection::Type type, bool movable)
TempoDialog::init (const Timecode::BBT_Time& when, double bpm, double note_type, TempoSection::Type type, bool movable, PositionLockStyle style)
{
vector<string> strings;
NoteTypes::iterator x;
@ -123,15 +123,33 @@ TempoDialog::init (const Timecode::BBT_Time& when, double bpm, double note_type,
}
}
if (tt == tempo_types.end()) {
tempo_type.set_active_text (strings[0]); // "ramped"
tempo_type.set_active_text (strings[1]); // "constant"
}
strings.clear();
lock_styles.insert (make_pair (_("music"), PositionLockStyle::MusicTime));
strings.push_back (_("music"));
lock_styles.insert (make_pair (_("audio"), PositionLockStyle::AudioTime));
strings.push_back (_("audio"));
set_popdown_strings (lock_style, strings);
LockStyles::iterator ls;
for (ls = lock_styles.begin(); ls != lock_styles.end(); ++ls) {
if (ls->second == style) {
lock_style.set_active_text (ls->first);
break;
}
}
if (ls == lock_styles.end()) {
lock_style.set_active_text (strings[0]); // "music"
}
Table* table;
if (UIConfiguration::instance().get_allow_non_quarter_pulse()) {
table = manage (new Table (5, 6));
table = manage (new Table (5, 7));
} else {
table = manage (new Table (5, 5));
table = manage (new Table (5, 6));
}
table->set_spacings (6);
@ -182,6 +200,12 @@ TempoDialog::init (const Timecode::BBT_Time& when, double bpm, double note_type,
get_vbox()->set_border_width (12);
get_vbox()->pack_end (*table);
Label* lock_style_label = manage (new Label(_("Lock Style:"), ALIGN_LEFT, ALIGN_CENTER));
table->attach (*lock_style_label, 0, 1, row+2, row+3);
table->attach (lock_style, 1, 2, row+2, row + 3);
get_vbox()->set_border_width (12);
get_vbox()->pack_end (*table);
table->show_all ();
add_button (Stock::CANCEL, RESPONSE_CANCEL);
@ -206,6 +230,7 @@ TempoDialog::init (const Timecode::BBT_Time& when, double bpm, double note_type,
when_beat_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &TempoDialog::entry_key_release), false);
pulse_selector.signal_changed().connect (sigc::mem_fun (*this, &TempoDialog::pulse_change));
tempo_type.signal_changed().connect (sigc::mem_fun (*this, &TempoDialog::tempo_type_change));
lock_style.signal_changed().connect (sigc::mem_fun (*this, &TempoDialog::lock_style_change));
tap_tempo_button.signal_button_press_event().connect (sigc::mem_fun (*this, &TempoDialog::tap_tempo_button_press), false);
tap_tempo_button.signal_focus_out_event().connect (sigc::mem_fun (*this, &TempoDialog::tap_tempo_focus_out));
@ -296,6 +321,19 @@ TempoDialog::get_tempo_type ()
return x->second;
}
PositionLockStyle
TempoDialog::get_lock_style ()
{
LockStyles::iterator x = lock_styles.find (lock_style.get_active_text());
if (x == lock_styles.end()) {
error << string_compose(_("incomprehensible lock style (%1)"), lock_style.get_active_text()) << endmsg;
return PositionLockStyle::MusicTime;
}
return x->second;
}
void
TempoDialog::pulse_change ()
{
@ -308,6 +346,12 @@ TempoDialog::tempo_type_change ()
set_response_sensitive (RESPONSE_ACCEPT, is_user_input_valid());
}
void
TempoDialog::lock_style_change ()
{
set_response_sensitive (RESPONSE_ACCEPT, is_user_input_valid());
}
bool
TempoDialog::tap_tempo_button_press (GdkEventButton *ev)
{
@ -362,7 +406,7 @@ MeterDialog::MeterDialog (TempoMap& map, framepos_t frame, const string&)
Meter meter (map.meter_at(frame));
map.bbt_time (frame, when);
init (when, meter.divisions_per_bar(), meter.note_divisor(), true);
init (when, meter.divisions_per_bar(), meter.note_divisor(), true, PositionLockStyle::MusicTime);
}
MeterDialog::MeterDialog (TempoMap& map, MeterSection& section, const string&)
@ -370,11 +414,11 @@ MeterDialog::MeterDialog (TempoMap& map, MeterSection& section, const string&)
{
Timecode::BBT_Time when;
map.bbt_time (map.frame_at_beat (section.beat()), when);
init (when, section.divisions_per_bar(), section.note_divisor(), section.movable());
init (when, section.divisions_per_bar(), section.note_divisor(), section.movable(), section.position_lock_style());
}
void
MeterDialog::init (const Timecode::BBT_Time& when, double bpb, double divisor, bool movable)
MeterDialog::init (const Timecode::BBT_Time& when, double bpb, double divisor, bool movable, PositionLockStyle style)
{
char buf[64];
vector<string> strings;
@ -417,9 +461,28 @@ MeterDialog::init (const Timecode::BBT_Time& when, double bpb, double divisor, b
note_type.set_active_text (strings[3]); // "quarter"
}
strings.clear();
lock_styles.insert (make_pair (_("music"), PositionLockStyle::MusicTime));
strings.push_back (_("music"));
lock_styles.insert (make_pair (_("audio ur brane wul xplod"), PositionLockStyle::AudioTime));
strings.push_back (_("audio"));
set_popdown_strings (lock_style, strings);
LockStyles::iterator ls;
for (ls = lock_styles.begin(); ls != lock_styles.end(); ++ls) {
if (ls->second == style) {
lock_style.set_active_text (ls->first);
break;
}
}
if (ls == lock_styles.end()) {
lock_style.set_active_text (strings[0]); // "music"
}
Label* note_label = manage (new Label (_("Note value:"), ALIGN_LEFT, ALIGN_CENTER));
Label* lock_label = manage (new Label (_("Lock style:"), ALIGN_LEFT, ALIGN_CENTER));
Label* bpb_label = manage (new Label (_("Beats per bar:"), ALIGN_LEFT, ALIGN_CENTER));
Table* table = manage (new Table (3, 2));
Table* table = manage (new Table (3, 3));
table->set_spacings (6);
table->attach (*bpb_label, 0, 1, 0, 1, FILL|EXPAND, FILL|EXPAND);
@ -438,6 +501,9 @@ MeterDialog::init (const Timecode::BBT_Time& when, double bpb, double divisor, b
table->attach (when_bar_entry, 1, 2, 2, 3, FILL | EXPAND, FILL | EXPAND);
}
table->attach (*lock_label, 0, 1, 3, 4, FILL|EXPAND, FILL|EXPAND);
table->attach (lock_style, 1, 2, 3, 4, FILL|EXPAND, SHRINK);
get_vbox()->set_border_width (12);
get_vbox()->pack_start (*table, false, false);
@ -456,6 +522,8 @@ MeterDialog::init (const Timecode::BBT_Time& when, double bpb, double divisor, b
when_bar_entry.signal_key_press_event().connect (sigc::mem_fun (*this, &MeterDialog::entry_key_press), false);
when_bar_entry.signal_key_release_event().connect (sigc::mem_fun (*this, &MeterDialog::entry_key_release));
note_type.signal_changed().connect (sigc::mem_fun (*this, &MeterDialog::note_type_change));
lock_style.signal_changed().connect (sigc::mem_fun (*this, &MeterDialog::lock_style_change));
}
bool
@ -527,6 +595,12 @@ MeterDialog::note_type_change ()
set_response_sensitive (RESPONSE_ACCEPT, is_user_input_valid());
}
void
MeterDialog::lock_style_change ()
{
set_response_sensitive (RESPONSE_ACCEPT, is_user_input_valid());
}
double
MeterDialog::get_bpb ()
{
@ -552,6 +626,19 @@ MeterDialog::get_note_type ()
return x->second;
}
PositionLockStyle
MeterDialog::get_lock_style ()
{
LockStyles::iterator x = lock_styles.find (lock_style.get_active_text());
if (x == lock_styles.end()) {
error << string_compose(_("incomprehensible meter lock style (%1)"), lock_style.get_active_text()) << endmsg;
return PositionLockStyle::MusicTime;
}
return x->second;
}
bool
MeterDialog::get_bbt_time (Timecode::BBT_Time& requested)
{

17
gtk2_ardour/tempo_dialog.h
View file

@ -45,9 +45,10 @@ public:
double get_note_type ();
bool get_bbt_time (Timecode::BBT_Time&);
ARDOUR::TempoSection::Type get_tempo_type ();
ARDOUR::PositionLockStyle get_lock_style ();
private:
void init (const Timecode::BBT_Time& start, double bpm , double note_type, ARDOUR::TempoSection::Type type, bool movable);
void init (const Timecode::BBT_Time& start, double bpm , double note_type, ARDOUR::TempoSection::Type type, bool movable, ARDOUR::PositionLockStyle style);
bool is_user_input_valid() const;
void bpm_changed ();
bool bpm_button_press (GdkEventButton* );
@ -55,6 +56,7 @@ private:
bool entry_key_release (GdkEventKey* );
void pulse_change ();
void tempo_type_change ();
void lock_style_change ();
bool tap_tempo_button_press (GdkEventButton* );
bool tap_tempo_focus_out (GdkEventFocus* );
@ -64,6 +66,9 @@ private:
typedef std::map<std::string, ARDOUR::TempoSection::Type> TempoTypes;
TempoTypes tempo_types;
typedef std::map<std::string, ARDOUR::PositionLockStyle> LockStyles;
LockStyles lock_styles;
bool tapped; // whether the tap-tempo button has been clicked
double sum_x, sum_xx, sum_xy, sum_y;
double tap_count;
@ -80,6 +85,8 @@ private:
Gtk::Label pulse_selector_label;
Gtk::Button tap_tempo_button;
Gtk::ComboBoxText tempo_type;
Gtk::ComboBoxText lock_style;
};
@ -92,20 +99,26 @@ public:
double get_bpb ();
double get_note_type ();
ARDOUR::PositionLockStyle get_lock_style ();
bool get_bbt_time (Timecode::BBT_Time&);
private:
void init (const Timecode::BBT_Time&, double, double, bool);
void init (const Timecode::BBT_Time&, double, double, bool, ARDOUR::PositionLockStyle style);
bool is_user_input_valid() const;
bool entry_key_press (GdkEventKey* );
bool entry_key_release (GdkEventKey* );
void note_type_change ();
void lock_style_change ();
typedef std::map<std::string,float> NoteTypes;
NoteTypes note_types;
typedef std::map<std::string, ARDOUR::PositionLockStyle> LockStyles;
LockStyles lock_styles;
Gtk::Entry bpb_entry;
Gtk::ComboBoxText note_type;
Gtk::ComboBoxText lock_style;
std::vector<std::string> strings;
Gtk::Button ok_button;
Gtk::Button cancel_button;

13
libs/ardour/ardour/tempo.h
View file

@ -100,9 +100,9 @@ class LIBARDOUR_API Meter {
class LIBARDOUR_API MetricSection {
public:
MetricSection (double beat)
: _beat (beat), _frame (0), _movable (true), _position_lock_style (MusicTime) {}
: _beat (beat), _frame (0), _movable (true), _position_lock_style (PositionLockStyle::MusicTime) {}
MetricSection (framepos_t frame)
: _beat (0), _frame (frame), _movable (true), _position_lock_style (MusicTime) {}
: _beat (0), _frame (frame), _movable (true), _position_lock_style (PositionLockStyle::AudioTime) {}
virtual ~MetricSection() {}
@ -362,14 +362,20 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
const MeterSection& meter_section_at (framepos_t) const;
void add_tempo (const Tempo&, double where, TempoSection::Type type);
void add_tempo (const Tempo&, framepos_t frame, TempoSection::Type type);
void add_meter (const Meter&, double beat, Timecode::BBT_Time where);
void add_meter (const Meter&, framepos_t frame);
void remove_tempo (const TempoSection&, bool send_signal);
void remove_meter (const MeterSection&, bool send_signal);
void replace_tempo (const TempoSection&, const Tempo&, const double& where, TempoSection::Type type);
void replace_tempo (const TempoSection&, const Tempo&, const framepos_t& where, TempoSection::Type type);
void gui_set_tempo_frame (TempoSection&, framepos_t where, double beat);
void replace_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where);
void replace_meter (const MeterSection&, const Meter&, const framepos_t& frame);
framepos_t round_to_bar (framepos_t frame, RoundMode dir);
framepos_t round_to_beat (framepos_t frame, RoundMode dir);
@ -435,7 +441,10 @@ private:
void do_insert (MetricSection* section);
void add_tempo_locked (const Tempo&, double where, bool recompute, TempoSection::Type type);
void add_tempo_locked (const Tempo&, framepos_t frame, bool recompute, TempoSection::Type type);
void add_meter_locked (const Meter&, double beat, Timecode::BBT_Time where, bool recompute);
void add_meter_locked (const Meter&, framepos_t frame, bool recompute);
bool remove_tempo_locked (const TempoSection&);
bool remove_meter_locked (const MeterSection&);

261
libs/ardour/tempo.cc
View file

@ -80,6 +80,7 @@ TempoSection::TempoSection (const XMLNode& node)
LocaleGuard lg;
BBT_Time bbt;
double beat;
uint32_t frame;
if ((prop = node.property ("start")) != 0) {
if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
@ -102,8 +103,13 @@ TempoSection::TempoSection (const XMLNode& node)
} else {
set_beat (beat);
}
} else {
error << _("TempoSection XML node has no \"beat\" property") << endmsg;
}
if ((prop = node.property ("frame")) != 0) {
if (sscanf (prop->value().c_str(), "%" PRIu32, &frame) != 1) {
error << _("TempoSection XML node has an illegal \"frame\" value") << endmsg;
} else {
set_frame (frame);
}
}
if ((prop = node.property ("beats-per-minute")) == 0) {
@ -147,6 +153,12 @@ TempoSection::TempoSection (const XMLNode& node)
} else {
_type = Type (string_2_enum (prop->value(), _type));
}
if ((prop = node.property ("lock-style")) == 0) {
set_position_lock_style (MusicTime);
} else {
set_position_lock_style (PositionLockStyle (string_2_enum (prop->value(), position_lock_style())));
}
}
XMLNode&
@ -158,6 +170,8 @@ TempoSection::get_state() const
snprintf (buf, sizeof (buf), "%f", beat());
root->add_property ("beat", buf);
snprintf (buf, sizeof (buf), "%li", frame());
root->add_property ("frame", buf);
snprintf (buf, sizeof (buf), "%f", _beats_per_minute);
root->add_property ("beats-per-minute", buf);
snprintf (buf, sizeof (buf), "%f", _note_type);
@ -167,6 +181,7 @@ TempoSection::get_state() const
snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
root->add_property ("movable", buf);
root->add_property ("tempo-type", enum_2_string (_type));
root->add_property ("lock-style", enum_2_string (position_lock_style()));
return *root;
}
@ -282,7 +297,7 @@ Duration in beats at time a is the integral of some Tempo function.
In our case, the Tempo function (Tempo at time t) is
T(t) = T0(e^(ct))
where c is the function constant
with function constant
c = log(Ta/T0)/a
so
a = log(Ta/T0)/c
@ -298,17 +313,16 @@ t(T) = log(T / T0) / c
We define c for this tempo ramp by placing a new tempo section at some time t after this one.
Our problem is that we usually don't know t.
We usually do know the duration in beats between this and the next tempo section.
Where t = a (i.e. when a is equal to the time of the next tempo section), we can solve t in terms of
beat duration and our two tempos.
A bit of scribbling with the beat function gives us:
We almost always know the duration in beats between this and the new section, so we need to find c in terms of the beat function.
Where a = t (i.e. when a is equal to the time of the next tempo section), the beat function reveals:
t = b log (Ta / T0) / (T0 (e^(log (Ta / T0)) - 1))
By substituting our expanded t as a in the c function above, we see that our problem is reduced to:
By substituting our expanded t as a in the c function above, our problem is reduced to:
c = T0 (e^(log (Ta / T0)) - 1) / b
We can now evaluate and store c for use in beat, time and tempo calculations until the following tempo section
(the one that defines c in conjunction with this one) is changed or moved.
We can now store c for future time calculations.
If the following tempo section (the one that defines c in conjunction with this one)
is changed or moved, c is no longer valid.
Most of this stuff is taken from this paper:
@ -440,6 +454,7 @@ MeterSection::MeterSection (const XMLNode& node)
const XMLProperty *prop;
BBT_Time bbt;
double beat = 0.0;
framepos_t frame = 0;
pair<double, BBT_Time> start;
if ((prop = node.property ("start")) != 0) {
@ -460,8 +475,6 @@ MeterSection::MeterSection (const XMLNode& node)
if (sscanf (prop->value().c_str(), "%lf", &beat) != 1 || beat < 0.0) {
error << _("MeterSection XML node has an illegal \"beat\" value") << endmsg;
}
} else {
error << _("MeterSection XML node has no \"beat\" property") << endmsg;
}
start.first = beat;
@ -480,6 +493,14 @@ MeterSection::MeterSection (const XMLNode& node)
set_beat (start);
if ((prop = node.property ("frame")) != 0) {
if (sscanf (prop->value().c_str(), "%li", &frame) != 1) {
error << _("MeterSection XML node has an illegal \"frame\" value") << endmsg;
} else {
set_frame (frame);
}
}
/* beats-per-bar is old; divisions-per-bar is new */
if ((prop = node.property ("divisions-per-bar")) == 0) {
@ -504,6 +525,14 @@ MeterSection::MeterSection (const XMLNode& node)
throw failed_constructor();
}
if ((prop = node.property ("lock-style")) == 0) {
warning << _("MeterSection XML node has no \"lock-style\" property") << endmsg;
//throw failed_constructor();
set_position_lock_style (PositionLockStyle::MusicTime);
} else {
set_position_lock_style (PositionLockStyle (string_2_enum (prop->value(), position_lock_style())));
}
if ((prop = node.property ("movable")) == 0) {
error << _("MeterSection XML node has no \"movable\" property") << endmsg;
throw failed_constructor();
@ -527,7 +556,10 @@ MeterSection::get_state() const
snprintf (buf, sizeof (buf), "%lf", beat());
root->add_property ("beat", buf);
snprintf (buf, sizeof (buf), "%f", _note_type);
root->add_property ("frame", buf);
snprintf (buf, sizeof (buf), "%li", frame());
root->add_property ("note-type", buf);
root->add_property ("lock-style", enum_2_string (position_lock_style()));
snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
root->add_property ("divisions-per-bar", buf);
snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
@ -697,8 +729,9 @@ TempoMap::do_insert (MetricSection* section)
if (tempo && insert_tempo) {
/* Tempo sections */
if (tempo->beat() == insert_tempo->beat()) {
PositionLockStyle const tpl = tempo->position_lock_style();
PositionLockStyle const ipl = insert_tempo->position_lock_style();
if (tpl == ipl && ((ipl == MusicTime && tempo->beat() == insert_tempo->beat()) || (ipl == AudioTime && tempo->frame() == insert_tempo->frame()))) {
if (!tempo->movable()) {
@ -720,7 +753,10 @@ TempoMap::do_insert (MetricSection* section)
/* Meter Sections */
MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
if (meter->beat() == insert_meter->beat()) {
PositionLockStyle const mpl = meter->position_lock_style();
PositionLockStyle const ipl = insert_meter->position_lock_style();
if (mpl == ipl && ((ipl == MusicTime && meter->beat() == insert_meter->beat()) || (ipl == AudioTime && meter->frame() == insert_meter->frame()))) {
if (!meter->movable()) {
@ -756,8 +792,14 @@ TempoMap::do_insert (MetricSection* section)
for (i = metrics.begin(); i != metrics.end(); ++i) {
MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
if (meter && meter->beat() > insert_meter->beat()) {
break;
if (meter) {
PositionLockStyle const ipl = insert_meter->position_lock_style();
if (ipl == MusicTime && meter->beat() > insert_meter->beat()) {
break;
}
if (ipl == AudioTime && meter->frame() > insert_meter->frame()) {
break;
}
}
}
} else if (insert_tempo) {
@ -765,7 +807,8 @@ TempoMap::do_insert (MetricSection* section)
TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
if (tempo) {
if (tempo->beat() > insert_tempo->beat()) {
PositionLockStyle const ipl = insert_tempo->position_lock_style();
if ((ipl == MusicTime && tempo->beat() > insert_tempo->beat()) || (ipl == AudioTime && tempo->frame() > insert_tempo->frame())) {
break;
}
}
@ -798,20 +841,60 @@ TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const doubl
PropertyChanged (PropertyChange ());
}
void
TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const framepos_t& frame, TempoSection::Type type)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
TempoSection& first (first_tempo());
if (ts.beat() != first.beat()) {
remove_tempo_locked (ts);
add_tempo_locked (tempo, frame, true, type);
} else {
first.set_type (type);
{
/* cannot move the first tempo section */
*static_cast<Tempo*>(&first) = tempo;
recompute_map (false);
}
}
}
PropertyChanged (PropertyChange ());
}
void
TempoMap::gui_set_tempo_frame (TempoSection& ts, framepos_t frame, double beat_where)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
/* currently this is always done in audio time */
//if (ts.position_lock_style() == MusicTime) {
if (0) {
if (ts.position_lock_style() == MusicTime) {
std::cerr << "Music " << " beat where : " << beat_where << " frame : " << frame <<std::endl;
/* MusicTime */
ts.set_beat (beat_where);
Metrics::const_iterator i;
TempoSection* prev_ts = 0;
MetricSectionSorter cmp;
metrics.sort (cmp);
for (i = metrics.begin(); i != metrics.end(); ++i) {
TempoSection* t;
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (t->beat() >= beat_where) {
break;
}
prev_ts = t;
}
}
prev_ts->set_c_func_from_tempo_and_beat (ts.beats_per_minute(), ts.beat() - prev_ts->beat(), _frame_rate);
ts.set_frame (prev_ts->frame_at_beat (ts.beat() - prev_ts->beat(), _frame_rate));
} else {
std::cerr << "Audio " << " beat where : " << beat_where << " frame : " << frame <<std::endl;
/*AudioTime*/
ts.set_frame (frame);
MetricSectionFrameSorter fcmp;
@ -892,9 +975,22 @@ TempoMap::add_tempo (const Tempo& tempo, double where, ARDOUR::TempoSection::Typ
PropertyChanged (PropertyChange ());
}
void
TempoMap::add_tempo (const Tempo& tempo, framepos_t frame, ARDOUR::TempoSection::Type type)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
add_tempo_locked (tempo, frame, true, type);
}
PropertyChanged (PropertyChange ());
}
void
TempoMap::add_tempo_locked (const Tempo& tempo, double where, bool recompute, ARDOUR::TempoSection::Type type)
{
TempoSection* ts = new TempoSection (where, tempo.beats_per_minute(), tempo.note_type(), type);
do_insert (ts);
@ -904,6 +1000,19 @@ TempoMap::add_tempo_locked (const Tempo& tempo, double where, bool recompute, AR
}
}
void
TempoMap::add_tempo_locked (const Tempo& tempo, framepos_t frame, bool recompute, ARDOUR::TempoSection::Type type)
{
TempoSection* ts = new TempoSection (frame, tempo.beats_per_minute(), tempo.note_type(), type);
std::cerr << "add tempo locked frame = " << ts->frame() << " pos lock : " << ts->position_lock_style() << std::endl;
do_insert (ts);
if (recompute) {
recompute_map (false);
}
}
void
TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where)
{
@ -923,6 +1032,26 @@ TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_T
PropertyChanged (PropertyChange ());
}
void
TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const framepos_t& frame)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
MeterSection& first (first_meter());
if (ms.beat() != first.beat()) {
remove_meter_locked (ms);
add_meter_locked (meter, frame, true);
} else {
/* cannot move the first meter section */
*static_cast<Meter*>(&first) = meter;
recompute_map (true);
}
}
PropertyChanged (PropertyChange ());
}
void
TempoMap::add_meter (const Meter& meter, double beat, BBT_Time where)
{
@ -932,6 +1061,24 @@ TempoMap::add_meter (const Meter& meter, double beat, BBT_Time where)
}
#ifndef NDEBUG
if (DEBUG_ENABLED(DEBUG::TempoMap)) {
dump (std::cerr);
}
#endif
PropertyChanged (PropertyChange ());
}
void
TempoMap::add_meter (const Meter& meter, framepos_t frame)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
add_meter_locked (meter, frame, true);
}
#ifndef NDEBUG
if (DEBUG_ENABLED(DEBUG::TempoMap)) {
dump (std::cerr);
@ -967,6 +1114,29 @@ TempoMap::add_meter_locked (const Meter& meter, double beat, BBT_Time where, boo
}
void
TempoMap::add_meter_locked (const Meter& meter, framepos_t frame, bool recompute)
{
/* MusicTime meters *always* start on 1|1|0. */
MeterSection* ms = new MeterSection (frame, meter.divisions_per_bar(), meter.note_divisor());
BBT_Time bbt;
pair<double, BBT_Time> pr;
bbt.bars = 1;
bbt.beats = 1;
bbt.ticks = 0;
/* just a dummy - the actual beat should be applied in recompute_map() as thins is AudioTime */
pr.first = 0.0;
pr.second = bbt;
ms->set_beat (pr);
do_insert (ms);
if (recompute) {
recompute_map (true);
}
}
void
TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
{
@ -1126,37 +1296,58 @@ TempoMap::recompute_map (bool reassign_tempo_bbt, framepos_t end)
}
Metrics::const_iterator i;
TempoSection* prev_ts = 0;
for (i = metrics.begin(); i != metrics.end(); ++i) {
TempoSection* t;
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
if (prev_ts->type() == TempoSection::Ramp) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat() - prev_ts->beat(), _frame_rate);
t->set_frame (prev_ts->frame_at_tempo (t->beats_per_minute(), _frame_rate) + prev_ts->frame());
} else {
double const ticks_relative_to_prev = (t->beat() - prev_ts->beat()) * BBT_Time::ticks_per_beat;
framecnt_t const duration = (framecnt_t) floor (ticks_relative_to_prev * prev_ts->frames_per_beat (_frame_rate)
* BBT_Time::ticks_per_beat);
prev_ts->set_c_func (0.0);
t->set_frame (duration + prev_ts->frame());
if (t->position_lock_style() == AudioTime) {
if (prev_ts->type() == TempoSection::Ramp) {
prev_ts->set_c_func (prev_ts->compute_c_func (t->beats_per_minute(), t->frame() - prev_ts->frame(), _frame_rate));
t->set_beat (prev_ts->beat_at_frame (t->frame() - prev_ts->frame(), _frame_rate) + prev_ts->beat());
} else {
prev_ts->set_c_func (0.0);
t->set_beat (prev_ts->beat_at_frame (t->frame() - prev_ts->frame(), _frame_rate) + prev_ts->beat());
}
} else if (t->position_lock_style() == MusicTime) {
if (prev_ts->type() == TempoSection::Ramp) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat() - prev_ts->beat(), _frame_rate);
t->set_frame (prev_ts->frame_at_beat (t->beat() - prev_ts->beat(), _frame_rate) + prev_ts->frame());
} else {
double const ticks_relative_to_prev = (t->beat() - prev_ts->beat()) * BBT_Time::ticks_per_beat;
framecnt_t const duration = (framecnt_t) floor (ticks_relative_to_prev * prev_ts->frames_per_beat (_frame_rate)
* BBT_Time::ticks_per_beat);
prev_ts->set_c_func (0.0);
t->set_frame (duration + prev_ts->frame());
}
}
}
prev_ts = t;
}
}
Metrics::const_iterator mi;
MeterSection* meter = 0;
for (mi = metrics.begin(); mi != metrics.end(); ++mi) {
for (Metrics::const_iterator mi = metrics.begin(); mi != metrics.end(); ++mi) {
/* We now have the tempo map set. use it to set meter positions.*/
if ((meter = dynamic_cast<MeterSection*> (*mi)) != 0) {
meter->set_frame (frame_at_tick (meter->beat() * BBT_Time::ticks_per_beat));
if (meter->position_lock_style() == AudioTime) {
/* a frame based meter has to have a 1|1|0 bbt */
pair<double, BBT_Time> pr;
BBT_Time where;
where.bars = 1;
where.beats = 1;
where.ticks = 0;
pr.first = tick_at_frame (meter->frame()) / BBT_Time::ticks_per_beat;
pr.second = where;
meter->set_beat (pr);
} else if (meter->position_lock_style() == MusicTime) {
meter->set_frame (frame_at_tick (meter->beat() * BBT_Time::ticks_per_beat));
}
}
}
}