fl.change~ object request

AlexHarker / FrameLib

A library for arbitrary-rate arbitrary-size frame processing

BSD 3-Clause "New" or "Revised" License

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fl.change~ object request #47

Closed jamesb93 closed 1 year ago

jamesb93 commented 4 years ago

It would be handy to be able to filter out repeated frames. Is there a way to do this currently? If not, can I suggest an fl.change~ object that only outputs a frame if it is different from the previous?

AlexHarker commented 4 years ago

You could test that the lists match using an fl.==~ operation on two frames summed to the length of the frame on one side. This could give you a 1 / 0 for whether the frame was the same from which you could drive an fl.route~ or similar to let the frame through or not.

AlexHarker commented 1 year ago

For @fearn-e:

this object would need to have an output that sometimes (but not always) triggers. That can be seen in FrameLib_Route::Valve (setInput mode and also the update method).
then it would need an update Method that figures out if the frame has changed (vs. a stored version - see FrameLib_FrameDelta) and stores the new input at the end.
If it is the same the update method sets the output not to trigger, otherwise it sets it to trigger
process will now only run if the input has changed and just needs to copy input to output (there's a special methods for that - see FrameLib_Route::Valve)

jamesb93 commented 1 year ago

👀

fearn-e commented 1 year ago

@AlexHarker Hold on, I just got round to starting this, ran the python script to make a new object, and it says fl.change~.cpp already exists. So I go and have a look, and what do you know. https://github.com/AlexHarker/FrameLib/blob/new-objects/FrameLib_Objects/Routing/FrameLib_Change.cpp (edit because i'm silly and linked to the wrong file initially)

I guess the only question is, is this object finished or do you want me to take a look at it anyway?

AlexHarker commented 1 year ago

Ah yes it would appear that I did do this and then promptly forgot all about it. It looks like I actually did the object in full, (including VS project etc.) although I suspect I did not write a helpfile.

Can you look to see if there is a proper helpfile and if not, can you make one and test that the object works...

AlexHarker commented 1 year ago

Now included in develop at dad4dcb4550158f057ec81aaea1f4ff02e06409c.