ardour/livetrax
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triggerbox: mostly working fast-forward for MIDI triggers

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This commit is contained in:
Paul Davis 2022-02-10 19:59:42 -07:00
parent 395b759f42
commit 2bf8b7ce11
1 changed files with 72 additions and 12 deletions
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74
libs/ardour/triggerbox.cc
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@ -1082,6 +1082,7 @@ AudioTrigger::start_and_roll_to (samplepos_t start_pos, samplepos_t end_position
if (_state == Stopped) {
retrigger ();
_state = WaitingToStart;
cue_launched = true;
}
pos += n;
@ -1911,6 +1912,44 @@ MIDITrigger::probably_oneshot () const
void
MIDITrigger::start_and_roll_to (samplepos_t start_pos, samplepos_t end_position)
{
const pframes_t block_size = AudioEngine::instance()->samples_per_cycle ();
BufferSet bufs;
/* no need to allocate any space for BufferSet because we call
audio_run<false>() which is guaranteed to never use the buffers.
AudioTrigger::_startup() also does not use BufferSet (MIDITrigger
does, and we use virtual functions so the argument list is the same
for both, even though only the MIDI case needs the BufferSet).
*/
startup (bufs, 0, _quantization);
cue_launched = true;
samplepos_t pos = start_pos;
Temporal::TempoMap::SharedPtr tmap (Temporal::TempoMap::use());
while (pos < end_position) {
pframes_t nframes = std::min (block_size, (pframes_t) (end_position - pos));
Temporal::Beats start_beats = tmap->quarters_at (timepos_t (pos));
Temporal::Beats end_beats = tmap->quarters_at (timepos_t (pos+nframes));
const double bpm = tmap->quarters_per_minute_at (timepos_t (start_beats));
pframes_t n = midi_run<false> (bufs, pos, pos+nframes, start_beats, end_beats, nframes, 0, bpm);
/* We could have reached the end. Check and restart, because
* TriggerBox::fast_forward() already determined that we are
* the active trigger at @param end_position
*/
if (_state == Stopped) {
retrigger ();
_state = WaitingToStart;
cue_launched = true;
}
pos += n;
}
}
timepos_t
@ -1970,7 +2009,11 @@ MIDITrigger::_startup (BufferSet& bufs, pframes_t dest_offset, Temporal::BBT_Off
{
Trigger::_startup (bufs, dest_offset, start_quantization);
MidiBuffer& mb (bufs.get_midi (0));
MidiBuffer* mb = 0;
if (bufs.count().n_midi() != 0) {
mb = &bufs.get_midi (0);
}
/* Possibly inject patch changes, if set */
@ -1979,7 +2022,9 @@ MIDITrigger::_startup (BufferSet& bufs, pframes_t dest_offset, Temporal::BBT_Off
_patch_change[chn].set_time (dest_offset);
cerr << index() << " Injecting patch change " << _patch_change[chn].program() << " @ " << dest_offset << endl;
for (int msg = 0; msg < _patch_change[chn].messages(); ++msg) {
mb.insert_event (_patch_change[chn].message (msg));
if (mb) {
mb->insert_event (_patch_change[chn].message (msg));
}
_box.tracker->track (_patch_change[chn].message (msg).buffer());
}
}
@ -1997,9 +2042,14 @@ void
MIDITrigger::shutdown (BufferSet& bufs, pframes_t dest_offset)
{
Trigger::shutdown (bufs, dest_offset);
if (bufs.count().n_midi()) {
MidiBuffer& mb (bufs.get_midi (0));
DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 shutdown, resolve notes @ %2\n", index(), dest_offset));
_box.tracker->resolve_notes (mb, dest_offset);
}
_box.tracker->reset ();
}
void
@ -2271,8 +2321,6 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
const Temporal::Beats maybe_last_event_timeline_beats = transition_beats + (event.time() - region_start);
std::cerr << "considering " << event << " with sb " << start_beats << " eb " << end_beats << " tb " << transition_beats << " + " << event.time() << " - " << region_start << " mletb "<< maybe_last_event_timeline_beats << " fb " << final_beat << endl;
if (maybe_last_event_timeline_beats > final_beat) {
/* do this to "fake" having reached the end */
DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 tlrr %2 >= fb %3, so at end with %4\n", index(), maybe_last_event_timeline_beats, final_beat, event));
@ -2284,8 +2332,6 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
const samplepos_t timeline_samples = tmap->sample_at (maybe_last_event_timeline_beats);
cerr << "\tin samples, that's " << timeline_samples << " vs. " << end_sample << endl;
if (timeline_samples >= end_sample) {
break;
}
@ -3290,11 +3336,25 @@ TriggerBox::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_samp
if (!_session.transport_state_rolling() && !allstop) {
_session.start_transport_from_trigger ();
}
} else if (_session.transport_state_rolling()) {
} else {
/* _locate_armed is true, so _currently_playing has been
fast-forwarded to our position, and is ready to
play. However, for MIDI triggers, we may need to dump a
bunch of state into our BufferSet to ensure that the state
of things matches the way it would have been had we actually
played the trigger/slot from the start.
*/
if (_session.transport_state_rolling()) {
if (tracker && bufs.count().n_midi()) {
tracker->flush (bufs.get_midi (0), 0, true);
}
_locate_armed = false;
} else {
return;
}
}
/* now get the information we need related to the tempo map and the
* timeline