Re: [LAD] how to store deferred events in a real time audio app?

I've created a very basic MIDI sequence a while ago, and the following is how I done it: -"Time" is kept track of using JACK frames, and a BPM. This tells you how many beats (from frame 0) you've played, and what "percentage" or part of beat your in. -"EventClip" objects have a big vector of "EventClipElement"s, which represent events like NOTE_ON, NOTE_OFF, CC_CHANGE, etc. -Process() gets Time information: int currentBeat; float currentPercent; -Check if the "time" just went past the next Event in the clip: // start code if ( EventClip->upcomingEvent()->beat == currentBeat ) { if ( EventClip->nextEvent()->percent <= currentPercent) { processEvent(); // write MIDI message in this case EventClip->goToNextEvent(); } } // end code That's pretty much it, now for the caveat's: -Vector's are not RT friendly, so use a List, or reserve *plenty* of space in your vector! -The EventClip class can be very simple, it only needs a way to quickly retrieve the *next* event, so having a member pointer to the next EventClipElement in the vector will make avoid lots of array access. -If you relocate on the timeline, then you'll have to "search" through the vector to find the right nextEvent. (ie where currentBeat == beat, but currentPercent < eventPercent) Note this was the first time I got a MIDI sequencer running, and there are probably other ways to do it too... perhaps which provide cleaner code & better readability... Keeping an eye on this :D -Harry