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triggerbox: try to detect "oneshot" clips and set clip properties appropriately

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This commit is contained in:
Paul Davis 2021-12-22 13:09:48 -07:00
parent 308a764e96
commit 0cfbf346e7
2 changed files with 59 additions and 1 deletions
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4
libs/ardour/ardour/triggerbox.h
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@ -141,6 +141,8 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
void set_use_follow (bool yn);
bool use_follow() const { return _use_follow; }
virtual bool probably_oneshot () const = 0;
timepos_t start_offset () const; /* offset from start of data */
virtual timepos_t current_length() const = 0; /* offset from start() */
virtual timepos_t natural_length() const = 0; /* offset from start() */
@ -309,6 +311,7 @@ class LIBARDOUR_API AudioTrigger : public Trigger {
timepos_t natural_length() const; /* offset from start of data */
void reload (BufferSet&, void*);
void io_change ();
bool probably_oneshot () const;
double position_as_fraction() const;
@ -381,6 +384,7 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
timepos_t current_length() const; /* offset from start of data */
timepos_t natural_length() const; /* offset from start of data */
void reload (BufferSet&, void*);
bool probably_oneshot () const;
double position_as_fraction() const;

56
libs/ardour/triggerbox.cc
View File

@ -491,13 +491,20 @@ Trigger::maybe_compute_next_transition (samplepos_t start_sample, Temporal::Beat
pframes_t extra_offset = 0;
BBT_Offset q (_quantization);
/* XXX need to use global grid here is quantization == zero */
/* Given the value of @param start, determine, based on the
* quantization, the next time for a transition.
*/
if (q.bars == 0) {
if (q < Temporal::BBT_Offset (0, 0, 0)) {
/* negative quantization == do not quantize */
std::cerr << "negative quant, start right now\n";
transition_samples = start_sample;
transition_beats = start;
transition_time = timepos_t (start);
} else if (q.bars == 0) {
Temporal::Beats transition_beats = start.round_up_to_multiple (Temporal::Beats (q.beats, q.ticks));
transition_bbt = tmap->bbt_at (transition_beats);
transition_time = timepos_t (transition_beats);
@ -807,6 +814,31 @@ AudioTrigger::set_region_in_worker_thread (boost::shared_ptr<Region> r)
setup_stretcher ();
set_usable_length ();
/* Given what we know about the tempo and duration, set the defaults
* for the trigger properties.
*/
if (_apparent_tempo == 0.) {
_stretchable = false;
_quantization = Temporal::BBT_Offset (-1, 0, 0);
_follow_action0 = None;
_follow_action_probability = 0; /* 100% left */
} else {
if (probably_oneshot()) {
/* short trigger, treat as a one shot */
_stretchable = false;
_follow_action0 = None;
_quantization = Temporal::BBT_Offset (-1, 0, 0);
} else {
_stretchable = true;
_quantization = Temporal::BBT_Offset (0, 1, 0);
_follow_action0 = Again;
}
_follow_action_probability = 0; /* 100% left */
}
PropertyChanged (ARDOUR::Properties::name);
return 0;
@ -913,6 +945,21 @@ AudioTrigger::determine_tempo ()
cerr << "barcnt = " << round (_barcnt) << endl;
}
bool
AudioTrigger::probably_oneshot () const
{
assert (_apparent_tempo != 0.);
if ((usable_length < (_box.session().sample_rate()/2)) ||
/* XXX use Meter here, not 4.0 */
((_barcnt <= 1) && (usable_length < (4.0 * ((_box.session().sample_rate() * 60) / _apparent_tempo))))) {
std::cerr << "looks like a one-shot\n";
return true;
}
return false;
}
void
AudioTrigger::io_change ()
{
@ -1285,6 +1332,13 @@ MIDITrigger::~MIDITrigger ()
{
}
bool
MIDITrigger::probably_oneshot () const
{
/* XXX fix for short chord stabs */
return false;
}
void
MIDITrigger::set_expected_end_sample (Temporal::TempoMap::SharedPtr const & tmap, Temporal::BBT_Time const & transition_bbt)
{