This fixes a crash with missing [MIDI] write-sources after
duplicating tracks [1]: Stealing write-source name fails, because
there is no write-source.
When duplicating tracks, reset_write_sources() is called before
any playlists are set [2]. So no new write-sources are created
because _playlists[DATA-TYPE] is empty.
During normal track creation write-sources are usually added
by the input-change handler [3]. However in this case the
state has been set, and since there is no change,
DiskWriter::configure_io does not call use_new_write_source()
NB. This also re-creates write-source when playlists are changed.
-=-
[1]
#3 0x00007f4420690102 in __GI___assert_fail at assert.c:101
#4 0x0000562bfa300dc9 in boost::shared_ptr<ARDOUR::SMFSource>::operator->() const at /usr/include/boost/smart_ptr/shared_ptr.hpp:734
#5 0x00007f442579ffa1 in ARDOUR::DiskWriter::steal_write_source_name[abi:cxx11]() at ../libs/ardour/disk_writer.cc:1290
#6 0x00007f4425e476b6 in ARDOUR::Track::steal_write_source_name[abi:cxx11]() at ../libs/ardour/track.cc:476
#7 0x00007f4425d060a2 in ARDOUR::Session::create_midi_source_by_stealing_name at ../libs/ardour/session.cc:4955
#8 0x0000562bf9ed39ab in MidiTimeAxisView::add_region at ../gtk2_ardour/midi_time_axis.cc:1650
#9 0x0000562bf9b05f2a in Drag::add_midi_region at ../gtk2_ardour/editor_drag.cc:568
-=-
[2]
#0 0x00007ffff7582e2f in ARDOUR::DiskWriter::reset_write_sources at ../libs/ardour/disk_writer.cc:946
#1 0x00007ffff757fce6 in ARDOUR::DiskWriter::set_state at ../libs/ardour/disk_writer.cc:333
#2 0x00007ffff7a81c93 in ARDOUR::Route::set_processor_state at ../libs/ardour/route.cc:3054
#3 0x00007ffff7a7f5d5 in ARDOUR::Route::set_state at ../libs/ardour/route.cc:2697
#4 0x00007ffff7c2aa1d in ARDOUR::Track::set_state at ../libs/ardour/track.cc:172
#5 0x00007ffff794f204 in ARDOUR::MidiTrack::set_state at ../libs/ardour/midi_track.cc:152
#6 0x00007ffff7b7e06b in ARDOUR::Session::XMLRouteFactory at ../libs/ardour/session_state.cc:1890
#7 0x00007ffff7addf7e in ARDOUR::Session::new_route_from_template at ../libs/ardour/session.cc:3048
#8 0x000055555621329a in DuplicateRouteDialog::on_response(int) at ../gtk2_ardour/duplicate_routes_dialog.cc:194
-=-
[3]
#0 0x00007ffff7583243 in ARDOUR::DiskWriter::use_new_write_source at ../libs/ardour/disk_writer.cc:996
#1 0x00007ffff75831c7 in ARDOUR::DiskWriter::reset_write_sources at ../libs/ardour/disk_writer.cc:989
#2 0x00007ffff75851ea in ARDOUR::DiskWriter::configure_io at ../libs/ardour/disk_writer.cc:1335
#3 0x00007ffff7a7b308 in ARDOUR::Route::configure_processors_unlocked at ../libs/ardour/route.cc:1912
#4 0x00007ffff7a79e4b in ARDOUR::Route::configure_processors at ../libs/ardour/route.cc:1719
#5 0x00007ffff7a86695 in ARDOUR::Route::input_change_handler at ../libs/ardour/route.cc:3632
Completing readout available() returns 0, until all
background threads have finished and joined.
This also improves performance by feeding suggested/required
amount of samples on every process() call.
These changes compile okay for me (using VS2019) although they wouldn't link to my older-built libraries. Hopefully he'll be okay if he builds everything with the same compiler.
Note that this is done at the GUI level, might need to double check if there are
other paths into a "save" that should be covered. Control surfaces use the action, but
Lua comes to mind
On recent Mac systems (Catalina) OpenGL is slower compared to
directly using GTK's NSView. Furthermore when compiled on
Catalina, and running on a system with a Retina screen, the initial
size of the canvas may be wrong:
libs/gtkmm2ext/nsglview.mm:175:1: warning: method possibly
missing a [super reshape] call [-Wobjc-missing-super-calls]
This is not an issue when running versions compiled on older systems.
removal of tape tracks removed an intermediate argument in the argument list; presence of default args for the
last two arguments and implicit conversion from int->bool prevented the compiler from complaining
about any existing calls.
This supplements/extends a54b000a70
