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Topic: Making DUI visualizer plugin: best way to fetch sample data + repaint? (Read 1974 times) previous topic - next topic
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Making DUI visualizer plugin: best way to fetch sample data + repaint?

I'm trying to develop a visualizer (a simple peak and RMS meter) component for the default UI. I used foo_sample as a starting point and removed all unnecessary source files from the project, so I kept main.cpp, PCH.cpp (dummy) and ui_element.cpp. Now I wonder what's the best approach to fetch the sample data at a regular interval and repaint the UI element's contents.

I found out that I can use Invalidate() to force a repaint and that on_playback_time() is called every second. For a visualizer that would be too slow, so I used SetTimer() and KillTimer() in combination with OnTimer() to get a smaller interval. But I'm sure there are better ways.

To retrieve the sample data I used visualisation_stream_v3 with get_absolute_time() and get_chunk_absolute() but I noticed that the video was ahead of the audio, just like I noticed with VST plug-ins before.