The audioMasterAutomate callback from plugin to host does include
the parameter-value.
Previously there was a redundant call
Plugin::parameter_changed_externally() -> get_parameter
-> VSTPlugin::get_parameter() back into the plugin to query the value.
calling back into the plugin from the callback, may explain
oddities and/or crashes with some VSTs.
- this implements in the intention behind the previous commit.
a tempo mark is constant until its end has been changed by a
shift-drag on the next marker.
- stretch drag (using shift on the curve) operates on
the true meaning of constant. in other words,
the only way you can make a tempo ramped is by adjusting the end
tempo (shift drag on the *next* mark). from this point onwards.
shift-drag the curve will change the start tempo and ctrl-drag
the curve will change the end (needs work). to reset the
curve to constant, 'make constant' should simply set the end
tempo (unimplemented).
most changes are due to a new design where tempo discontinuities at the
beginning of a ramped section may be set.
this allows easier mapping of live performance, especially in
the common case of a ramped ritard before the beginning of a new section.
feature summary:
holding constraint modifier (shift) while dragging the BBT ruler area
drags the tempo lines by changing the start tempo (as before)
holding copy modifier (control) while dragging the BBT ruler area
drags the tempo lines by changing the end tempo (ahem. not quite there)
dragging a tempo mark while holding constraint (shift) will change the
previous end tempo to match the marker position *worth trying*.
holding constraint and copy modifier (control + shift) while dragging
the BBT ruler area attempts to'pinch' or twist the surrounding tempi
sp that later ones are not repositioned (currently suffereng from
rounding errors)
The previously-commented code is precisely what gets invoked
when solo state changes, and had nothing to do with actually
changing solo state in any way.
master(s) value now just scales the control's own value; a trivial
bit of math at assign/deassign ensures that values do not change
during add/remove master operations
