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Tempo ramps - more bbt ruler dragging work.

This commit is contained in:
nick_m 2016-05-12 05:32:38 +10:00
parent 49bd710b9b
commit abac4ce854
4 changed files with 140 additions and 19 deletions
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10
gtk2_ardour/editor_drag.cc
View File

@ -3478,6 +3478,7 @@ TempoMarkerDrag::aborted (bool moved)
BBTRulerDrag::BBTRulerDrag (Editor* e, ArdourCanvas::Item* i)
: Drag (e, i)
, _tempo (0)
, before_state (0)
{
DEBUG_TRACE (DEBUG::Drags, "New BBTRulerDrag\n");
@ -3491,13 +3492,18 @@ BBTRulerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
ostringstream sstr;
sstr << fixed << setprecision(3) << map.tempo_at (adjusted_current_frame (event)).beats_per_minute();
show_verbose_cursor_text (sstr.str());
_tempo = const_cast<TempoSection*> (&map.tempo_section_at (adjusted_current_frame (event, false)));
if (!_tempo) {
Drag::abort();
}
}
void
BBTRulerDrag::setup_pointer_frame_offset ()
{
TempoMap& map (_editor->session()->tempo_map());
_pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (ceil (map.beat_at_frame (raw_grab_frame())));
_pointer_frame_offset = raw_grab_frame() - map.frame_at_beat (floor (map.beat_at_frame (raw_grab_frame())));
}
void
@ -3515,7 +3521,7 @@ BBTRulerDrag::motion (GdkEvent* event, bool first_move)
if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::constraint_modifier())) {
/* adjust previous tempo to match pointer frame */
_editor->session()->tempo_map().gui_dilate_tempo (last_pointer_frame(), pf);
_editor->session()->tempo_map().gui_dilate_tempo (_tempo, last_pointer_frame(), pf);
}
ostringstream sstr;
sstr << fixed << setprecision(3) << map.tempo_at (pf).beats_per_minute();

3
gtk2_ardour/editor_drag.h
View File

@ -37,6 +37,7 @@
namespace ARDOUR {
class Location;
class TempoSection;
}
namespace ArdourCanvas {
@ -763,7 +764,7 @@ public:
void setup_pointer_frame_offset ();
private:
ARDOUR::TempoSection* _tempo;
XMLNode* before_state;
};

3
libs/ardour/ardour/tempo.h
View File

@ -398,8 +398,9 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
void gui_move_meter (MeterSection*, const framepos_t& frame);
void gui_move_meter (MeterSection*, const Timecode::BBT_Time& bbt);
bool gui_change_tempo (TempoSection*, const Tempo& bpm);
void gui_dilate_next_tempo (const framepos_t& frame, const framepos_t& end_frame);
void gui_dilate_tempo (MeterSection*, const framepos_t& frame);
void gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame);
void gui_dilate_tempo (TempoSection* tempo, const framepos_t& frame, const framepos_t& end_frame);
bool can_solve_bbt (TempoSection* section, const Timecode::BBT_Time& bbt);

143
libs/ardour/tempo.cc
View File

@ -2783,7 +2783,7 @@ TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
}
void
TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame)
TempoMap::gui_dilate_next_tempo (const framepos_t& frame, const framepos_t& end_frame)
{
Metrics future_map;
TempoSection* ts = 0;
@ -2791,13 +2791,22 @@ TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame
{
Glib::Threads::RWLock::WriterLock lm (lock);
ts = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
if (!ts) {
return;
for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
TempoSection* t = 0;
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (t->frame() > end_frame) {
ts = t;
break;
}
}
}
TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
if (!ts) {
ts = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
}
TempoSection* next_t = copy_metrics_and_point (_metrics, future_map, ts);
TempoSection* prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, next_t->frame() - 1));
TempoSection* prev_to_prev_t = 0;
const frameoffset_t fr_off = end_frame - frame;
@ -2812,11 +2821,10 @@ TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame
double contribution = 0.0;
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
/* prev to prev_t's position will remain constant in terms of frame and pulse. lets use frames. */
contribution = prev_to_prev_t->beats_per_minute() / (prev_to_prev_t->beats_per_minute() + prev_t->beats_per_minute());
contribution = prev_t->beats_per_minute() / (prev_t->beats_per_minute() + next_t->beats_per_minute());
}
frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
frameoffset_t prev_t_frame_contribution = fr_off;
const double start_tempo = prev_t->tempo_at_frame (frame, _frame_rate);
const double end_tempo = prev_t->tempo_at_frame (frame + prev_t_frame_contribution, _frame_rate);
@ -2856,10 +2864,117 @@ TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame
}
}
} else {
const double end_minute = (((frame + prev_t_frame_contribution) - prev_t->frame()) / (double) _frame_rate) / 60.0;
const double end_minute = ((next_t->frame() + prev_t_frame_contribution - prev_t->frame()) / (double) _frame_rate) / 60.0;
const double pulse_delta_at_next = prev_t->pulse_at_frame ((next_t->frame()) + prev_t_frame_contribution, _frame_rate) - next_t->pulse();
const double target_pulse = (next_t->pulse() - prev_t->pulse()) + (pulse_delta_at_next);
new_bpm = (((start_pulse - prev_t->pulse()) * prev_t->c_func())
/ (exp (end_minute * prev_t->c_func()) - 1)) * (double) prev_t->note_type();
new_bpm = (prev_t->tempo_at_frame (next_t->frame() - prev_t_frame_contribution, _frame_rate)) * (double) prev_t->note_type();
}
next_t->set_beats_per_minute (new_bpm);
recompute_tempos (future_map);
recompute_meters (future_map);
if (check_solved (future_map, true)) {
ts->set_beats_per_minute (new_bpm);
recompute_tempos (_metrics);
recompute_meters (_metrics);
}
}
Metrics::const_iterator d = future_map.begin();
while (d != future_map.end()) {
delete (*d);
++d;
}
MetricPositionChanged (); // Emit Signal
}
void
TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame)
{
Metrics future_map;
{
Glib::Threads::RWLock::WriterLock lm (lock);
if (!ts) {
return;
}
TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
TempoSection* prev_to_prev_t = 0;
const frameoffset_t fr_off = end_frame - frame;
if (prev_t && prev_t->pulse() > 0.0) {
prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, prev_t->frame() - 1));
}
TempoSection* next_t = 0;
for (Metrics::iterator i = future_map.begin(); i != future_map.end(); ++i) {
TempoSection* t = 0;
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (t->frame() > ts->frame()) {
next_t = t;
break;
}
}
}
/* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
*/
double contribution = 0.0;
if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
}
frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
const double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
const double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
double new_bpm;
if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
if (prev_t->position_lock_style() == MusicTime) {
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
/ (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
} else {
/* prev to prev is irrelevant */
if (start_pulse != prev_t->pulse()) {
new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
} else {
new_bpm = prev_t->beats_per_minute();
}
}
} else {
/* AudioTime */
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
/ (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
} else {
/* prev_to_prev_t is irrelevant */
if (end_frame != prev_t->frame()) {
new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
} else {
new_bpm = prev_t->beats_per_minute();
}
}
}
} else {
const frameoffset_t halfway = ((next_t->frame() + prev_t->frame()) / 2.0);
const frameoffset_t halfway_off = halfway + prev_t_frame_contribution;
const double halfway_pulse = prev_t->pulse_at_frame (halfway, _frame_rate);
const double halfway_off_minute = ((halfway_off - prev_t->frame()) / (double) _frame_rate) / 60.0;
new_bpm = (((halfway_pulse - prev_t->pulse()) * prev_t->c_func())
/ (exp (halfway_off_minute * prev_t->c_func()) - 1.0)) * (double) prev_t->note_type();
}
@ -2868,9 +2983,7 @@ TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame
recompute_meters (future_map);
if (check_solved (future_map, true)) {
prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
prev_t->set_beats_per_minute (new_bpm);
ts->set_beats_per_minute (new_bpm);
recompute_tempos (_metrics);
recompute_meters (_metrics);
}