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cae6669275
This gets meter type VST effects working again by extending the The master now maintains his own internal buffers and sums (mixes) all playing tracks into those buffers. The buffers are then fed into the VST effect that is presented to the user. This allows the effect to provide feedback to the user if it support it. Such effects may display meters or clipping indicators. Several issues with treading have also been corrected (hopefully ;-)). These showed up mostly on Linux, but could have happened on the others as well. The realtime support is no longer limited to 2 channels per logical track. Once support for more channels is added, this should be ready for it. The rack dialog can now be toggled via the edit toolbar button. It doesn't stay pressed because the closing of the dialog would have to be communicated back to the toolbar. As the rack is updated with new or removed effects or active state changed, all effects in the active list were shutdown and all effects in the updated list were initialized. This now shuts down only the effects no longer in the list and initializes only new ones. The rack now uses wxBitmapButton instead of Audacity's AButton. The AButton has a timing issue that prevents it from being deleted while processing the click event. I looked into it, but gave up and switched to the wxBitmapButton. Unfortunately, there's a problem with the wxBitmapButton as well...at least on my setup here. Either the bitmaps are being scaled or antialiased. Will have to get feedback on this. I finally figured out why some VSTs didn't seem to do anything in realtime, at least in my case anyway. I've installed a lot of demo VSTs and while they work in "batch/offline" mode, some of them will not work in realtime since vendors tend to remove automation as one of the demo limitations. More changes coming shortly...