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triggerbox: estimate_midi_patches tries to retain patch info across domains 

* initialize patches to GM standard (drums on 10) in case file has none
* in the case where file had none, check the Auditioner to see if user set any
* in the case where a file has patches, use those instead

* also stash the UsedChannels so we can show only the used chans in the UI
This commit is contained in:
Ben Loftis 2022-02-24 14:37:19 -06:00
parent fcd45cfca7
commit dce3f2eb65
2 changed files with 49 additions and 0 deletions
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2
libs/ardour/ardour/triggerbox.h
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@ -539,6 +539,8 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
void reload (BufferSet&, void*);
bool probably_oneshot () const;
void estimate_midi_patches ();
int set_region_in_worker_thread (boost::shared_ptr<Region>);
void jump_start ();
void shutdown (BufferSet& bufs, pframes_t dest_offset);

47
libs/ardour/triggerbox.cc
View File

@ -2371,6 +2371,48 @@ MIDITrigger::natural_length() const
return timepos_t (Temporal::BeatTime);
}
void
MIDITrigger::estimate_midi_patches ()
{
/* first, intialize all our slot's patches to GM defaults, to make playback deterministic */
for (uint8_t chan = 0; chan < 16; ++chan) {
_patch_change[chan].set_channel(chan);
_patch_change[chan].set_bank( chan == 9 ? 120 : 0 );
_patch_change[chan].set_program( 0 );
}
boost::shared_ptr<SMFSource> smfs = boost::dynamic_pointer_cast<SMFSource> (_region->source(0));
if (smfs) {
/* second, apply any patches that the Auditioner has in its memory
* ...this handles the case where the user chose patches for a file that itself lacked patch-settings
* (it's possible that the user didn't audition the actual file they dragged in, but this is still the best starting-point we have)
* */
boost::shared_ptr<ARDOUR::Auditioner> aud = _box.session().the_auditioner();
if (aud) {
for (uint8_t chan = 0; chan < 16; ++chan) {
if (aud->patch_change (chan).is_set()) {
_patch_change[chan] = aud->patch_change (chan);
}
}
}
/* thirdly, apply the patches from the file itself (if it has any) */
boost::shared_ptr<MidiModel> model = smfs->model();
for (MidiModel::PatchChanges::const_iterator i = model->patch_changes().begin(); i != model->patch_changes().end(); ++i) {
if ((*i)->is_set()) {
int chan = (*i)->channel(); /* behavior is undefined for SMF's with multiple patch changes. I'm not sure that we care */
_patch_change[chan].set_channel ((*i)->channel());
_patch_change[chan].set_bank((*i)->bank());
_patch_change[chan].set_program((*i)->program());
}
}
/* finally, store the used_channels so the UI can show patches only for those chans actually used */
DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 estimate_midi_patches(), using channels %2\n", name(), smfs->used_channels().to_string().c_str()));
set_segment_used_channels(smfs->used_channels());
}
}
int
MIDITrigger::set_region_in_worker_thread (boost::shared_ptr<Region> r)
{
@ -2386,6 +2428,11 @@ MIDITrigger::set_region_in_worker_thread (boost::shared_ptr<Region> r)
set_length (mr->length());
model = mr->model ();
estimate_midi_patches ();
/* we've changed some of our internal values; we need to update our queued UIState or they will be lost when UIState is applied */
copy_to_ui_state ();
DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 loaded midi region, span is %2\n", name(), data_length));
send_property_change (ARDOUR::Properties::name);