- Remove the redundant hasSampleExactData() function. Instead, signal lack of s.ex.data by returning a NULL in valueBuffer()
- Cache s.ex.buffers and only update them once per period
- Make valueBuffer() in AutomatableModel threadsafe so that it can be used for NPH's sharing the same model
- Add sample-exactness to instrumenttrack's vol & pan knobs
Change in handling of frameoffset for multistreamed instruments and sampletracks.
- Instead of holding the offset for the lifetime of the playhandle, negate the offset in the first period
- Multistream-instruments require some small changes: they have to now check for the offset and accordingly leave empty space in the start of the period (already done in this commit)
- There are possibly optimizations that can be done later
- This change is necessary so that we can have sample-exact models, and sample-exact vol/pan knobs for all instruments. Earlier multistream instruments were always rendering some frames ahead-of-time, so applying sample-exact data for them would have been impossible, since we don't have the future-values yet...
For both RC12 and RC24 filter types: handle lowpass separately, because we can then calculate highpass & bandpass with less operations.
This shouldn't affect the performance of lowpass, but probably will make highpass and bandpass a bit faster.
Apparently, we can use QBrush -typed properties in the CSS. This just never occured to me before!
So, this has several benefits. A QColor property only allows a singular RGB value, but a QBrush allows the same plus also qgradients, RGBA-colours and maybe even bitmap patterns. So I'm changing some properties to QBrush, where it makes sense to allow this additional functionality - no need to enable it for simple things like text colours or such.
- Song editor background: instead of the earlier hack with 7 qproperties just to set a limited background gradient, we can use only 2 properties and allow much more flexibility with Qt's own qgradient syntax
- Automation editor: background, graph colour, and the sidebar colour - @musikBear recently complained not seeing the grid through the graph, so transparency can help there, and qlineargradients in the graph can produce very cool visual effects. Grid is pointless to change, it should stay single-colour for now.
- Piano roll: here, I only made the background use QBrush - we don't really have much else here that can utilize QBrush, the notes have their own gradient system... maybe the 2nd colour of the note gradient could be customizable though.
There are probably more places where this change makes sense...
