Since cc6c0f1263 there is no Properties::position event
when a region is moved. So notify_region_moved() or
notify_region_start_trimmed() was never emitted and
Session::maybe_update_session_range() was not called.
When a track's output is not connected, but the track feeds
other tracks via sends (common case in Mixbus) the stem
export of the track was not correctly aligned.
The track is correctly latency compensated (due to sends), but
the unconnected port's latency is not set.
However stem-export uses the private latency of the port as alignment.
* audio files can be named "0bpm" to make them un-stretchable
* however they still need a sensible beatcnt, and therefore tempo
* assume tempo 120bpm and assign a beatcnt based on the file's length
* the user might later enable stretch, and we need to be sensible about it
VCAManager::create_vca sets PI::order while holding the
VCAManager:lock mutex. PI order changes emit a "changed" signal
which in turn can result in querying a list of all strips
(reassign_track_numbers) which requires the VCA mutex:
See also 729ff35faf
```
#2 Glib::Threads::Mutex::Lock::Lock(Glib::Threads::Mutex&) (this=0x7fffffffb070, mutex=...) at /usr/include/glibmm-2.4/glibmm/threads.h:687
#3 ARDOUR::VCAManager::vcas[abi:cxx11]() const (this=0x5555599b6d10) at ../libs/ardour/vca_manager.cc:77
#4 ARDOUR::Session::get_stripables(std::__cxx11::list<boost::shared_ptr<ARDOUR::Stripable>, std::allocator<boost::shared_ptr<ARDOUR::Stripable> > >&, ARDOUR::PresentationInfo::Flag) const (this=0x55555bf03910, sl=std::__cxx11::list = {...}, fl=127) at ../libs/ardour/session.cc:3949
#5 ARDOUR::Session::ensure_stripable_sort_order() (this=0x55555bf03910) at ../libs/ardour/session.cc:2634
#6 ARDOUR::Session::notify_presentation_info_change(PBD::PropertyChange const&) (this=0x55555bf03910, what_changed=...) at ../libs/ardour/session.cc:7016
[ .. connect same thread ..]
#13 ARDOUR::PresentationInfo::send_static_change(PBD::PropertyChange const&) (what_changed=...) at ../libs/ardour/presentation_info.cc:113
#14 ARDOUR::PresentationInfo::set_order(unsigned int) (this=0x5555619ceca0, order=5) at ../libs/ardour/presentation_info.cc:288
#15 ARDOUR::Stripable::set_presentation_order(unsigned int) (this=0x5555619ce8a0, order=5) at ../libs/ardour/stripable.cc:55
#16 ARDOUR::VCAManager::create_vca(unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
(this=0x5555599b6d10, howmany=1, name_template="VCA %n") at ../libs/ardour/vca_manager.cc:105
```
Control surfaces c'tor usually subscribe to signals e.g.
PortConnectedOrDisconnected. This happens after the parent BaseUI
is created, but before set_active() -> BaseUI::run() is called.
At this point in time there is no run_loop thread.
There are two options to handle AbstractUI::call_slot():
A. Queue the event in the event-loop, using the thread-local
request buffer of the caller. Then hope the BaseUI
thread is started, and calls ::handle_ui_requests() before
the memory pool runs out of space.
B. Handle the event in the calling thread. -- This may not be
rt-safe and may call functions with locks held by the caller.
It will however not accumulate events.
This takes approach (B). If _run_loop_thread is NULL, directly
handle the signal.
In the past, prior to 50abcc74b5, approach (A) was taken.
NULL never matched Glib::Threads::Thread::self().
This also reverts a prior attempt (e417495505) to address this issue.
Changing banks refills the dropdown. This cannot be avoided
since unnamed banks are not in the dropdown, and the dropdown
content can change dynamically. Scroll-wheel does not work reliably.
The Model must be destroyed after the iterator, otherwise
the iterator's d'tor will cause memory corruption trying to lock
the model:
```
Invalid read of size 4
at pthread_rwlock_unlock (pthread_rwlock_unlock.c:39)
by Glib::Threads::RWLock::ReaderLock::~ReaderLock() (threads.h:828)
by void boost::checked_delete<Glib::Threads::RWLock::ReaderLock>(Glib::Threads::RWLock::ReaderLock*) (checked_delete.hpp:36)
by boost::detail::sp_counted_impl_p<Glib::Threads::RWLock::ReaderLock>::dispose() (sp_counted_impl.hpp:89)
by boost::detail::sp_counted_base::release() (sp_counted_base_gcc_atomic.hpp:120)
by boost::detail::shared_count::~shared_count() (shared_count.hpp:432)
by boost::shared_ptr<Glib::Threads::RWLock::ReaderLock>::~shared_ptr() (shared_ptr.hpp:335)
by Evoral::Sequence<Temporal::Beats>::const_iterator::~const_iterator() (Sequence.h:224)
by ARDOUR::MIDITrigger::~MIDITrigger() (triggerbox.cc:2037)
by ARDOUR::MIDITrigger::~MIDITrigger() (triggerbox.cc:2039)
by ARDOUR::TriggerBoxThread::delete_trigger(ARDOUR::Trigger*) (triggerbox.cc:4386)
by ARDOUR::TriggerBoxThread::thread_work() (triggerbox.cc:4314)
by ARDOUR::TriggerBoxThread::_thread_work(void*) (triggerbox.cc:4285)
by fake_thread_start(void*) (pthread_utils.cc:101)
by start_thread (pthread_create.c:477)
by clone (clone.S:95)
Address 0x28229798 is 24 bytes inside a block of size 56 free'd
at free (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
by Glib::Threads::RWLock::~RWLock() (in /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1.3.0)
by Evoral::Sequence<Temporal::Beats>::~Sequence() (Sequence.h:68)
by ARDOUR::AutomatableSequence<Temporal::Beats>::~AutomatableSequence() (automatable_sequence.h:31)
by ARDOUR::MidiModel::~MidiModel() (midi_model.h:58)
by ARDOUR::MidiModel::~MidiModel() (midi_model.h:58)
by void boost::checked_delete<ARDOUR::MidiModel>(ARDOUR::MidiModel*) (checked_delete.hpp:36)
by boost::detail::sp_counted_impl_p<ARDOUR::MidiModel>::dispose() (sp_counted_impl.hpp:89)
by boost::detail::sp_counted_base::release() (sp_counted_base_gcc_atomic.hpp:120)
by boost::detail::shared_count::~shared_count() (shared_count.hpp:432)
by boost::shared_ptr<ARDOUR::MidiModel>::~shared_ptr() (shared_ptr.hpp:335)
by ARDOUR::MIDITrigger::~MIDITrigger() (triggerbox.cc:2037)
by ARDOUR::MIDITrigger::~MIDITrigger() (triggerbox.cc:2039)
by ARDOUR::TriggerBoxThread::delete_trigger(ARDOUR::Trigger*) (triggerbox.cc:4386)
by ARDOUR::TriggerBoxThread::thread_work() (triggerbox.cc:4314)
by ARDOUR::TriggerBoxThread::_thread_work(void*) (triggerbox.cc:4285)
by fake_thread_start(void*) (pthread_utils.cc:101)
by start_thread (pthread_create.c:477)
by clone (clone.S:95)
```
* intercept {pgm|bank}-change messages, and replace them with triggerbox values
* check is_set() extensively; we have arrays of pgms but most are unused
* 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
* if a file has program-changes, then it will set() my patches
* if a file does *not* have PCs, the user might choose one (which sets() it)
* if the next file does *not* have PCs, we should preserve the user's selection
* if the next file has PCs, it will set() it (losing the user selection)
we screen midi files for some aggregate info:
used channels, used patches, and note-count
you can't do this from open() because there are cases (after importing)
when the source exists but it is not yet written to disk
On macOS, `context->get_targets ()` may be empty when dragging.
In this case the Clip-Picker assumed that a slot is about to
be dropped and switched to the local clip library.
This in turn cleared selection and it was no lnger possible
to drag any clip out of the library.
This prevents a crash at exit if the analyzer is still analyzing
when Ardour terminates. A possible downside is that an ongoing
analysis will keep the application running for a bit longer.
When auditioning is started, transport controls are disabled
via `set_transport_sensitivity(false)`.
This prevents <space> from being handled:
DEBUG::Bindings: binding for Key 32 (space) state 0 : Transport/ToggleRoll - insensitive, skipped
So the key event is passed on, and can reach the clip-picker treeview
where <space> selects and/or activates a row, which re-starts
audition.
ARDOUR_UI::toggle_roll() cancels audition when audition is active,
so this action should be sensitive, even while auditioning.
This is mainly because Glib::Threads (g_system_thread_new)
uses pthread on Un*x, but on Windows relies on GThreadWin32
(HANDLE)_beginthreadex
This later causes issues e.g. in BaseUI::run()
```
unhandled exception (type Glib::Error) in signal handler:
domain: g_thread_error
code : 0
what : Error setting new thread priority: The parameter is incorrect.
```
For example, the following log text creates a markup error that results in
the session loading dialog being completely empty.
WARNING: VST3<C:\Program Files\Common Files\VST3\Plugins.VST.Someplugin.vst3\Contents\x86-win\Plugins.VST.Someplugin.vst3>: Invalid Module Path
...
Gtk-WARNING **: 16:46:28.447: Failed to set text from markup due to error parsing markup: Error on line 7 char 40: ?Files\Common? is not a valid name: ?\?
