-=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- (c) WidthPadding Industries 1987 0|72|0 -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=-
SoCoder -> Snippet Home -> Variables


 
HoboBen
Created : 22 April 2011
Edited : 25 April 2011
Language : Monkey

Circular Buffer (C)



A fast fixed-size buffer. which you can pretend is "infinite memory" for data that you don't care too much about.

When you write to it, it fills up until you start overwriting the oldest data. When reading, it returns the oldest data it has.

Ideal for buffering data anywhere a bandwidth is a problem, like text input when you have a low framerate, or streaming real-time sound or video where the past doesn't matter too much.



It looks simple, but was a helluva thing to implement as the intuitive solutions (like checking if start == end for detecting emptiness) don't work. So hopefully it saves somebody else the trouble!

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Comments


Monday, 25 April 2011, 14:09
Scherererer
BUFFER_SIZE isn't defined in this snippet, shouldn't it be defined so that it can be used, so that we can change this:


to this:

Monday, 25 April 2011, 14:50
HoboBen
Whoops! Yes, you're right. Thanks for the correction.