to_write must not exceed `total = _samples_pending_write`.
If the write succeeds (events spanning `to_write` samples are written)
to_write is atomically subtracted from `_samples_pending_write`.
This produces synchronous events on Audio and MIDI ports.
One rvent per second, exactly at every second since engine-start.
MIDI: C-4 Note-on/off (1 sample long)
Audio: +1/-1 transition:
+1 in sync with Note-on,
-1 in sync with Note-off
the value is used by the parser context; the old code called it only after the *first* parser context
was created. therefore the first XMLTree::read() call has its behavior determined by libxml2's default
for this value, rather than by our explicit choice (do not treat whitespace as a note). All subequent
read() calls will use our value.
This variable inside libxml2 is actually per-thread, which just increases the stakes for calling
xmlKeepBlanksDefault() at the right time
Some builds of glib on macOS end up delivering IO_PRI when IO_IN is also set. This differs from our own build stack
version, but it isn't really an error, so we should handle it.
This partially reverts 2edbda2526.
Using cairo-groups increases performance on MacOS, and retains
retina-resolution.
However it adds a performance regression for MS Windows graphics
rendering. cairo-groups use a "similar" surface, not an image surface.
Empirically this adds significant overhead compared to rendering
using the CPU and using bitblt.
This forces saving session-specific GUI settings (Playhead
position, zoom/scroll with stationary PH, window and pane
positions, etc.
While many GUI operations immediately cause an instant.xml
save, changing the playhead-pos in particular does not, nor
mark the session as modified.
This fixes an issue:
1. open session
2. move playhead
3. close session
4. re-open session, expect playhead at position from (2)
This should not happen -- VST gui_event_loop is only
started if LXVST_XDisplay is not NULL.
However the eventloop itself checks if LXVST_XDisplay is set,
so this might happen with headless builds that still have
access to a display, or due to some async event.
This reverts commit af30a6f001
because it breaks OSX/MacOS builds:
libs/surfaces/mackie/mackie_control_protocol.cc:945: error: 'G_SOURCE_FUNC' was not declared in this scope
