JACK is exactly designed for this use case. The documentation is bit hard to get from a beginner's perspective, but there are of sample apps that you can look at in the JACK distribution. Basically all audio processing in Linux is done on a buffer-by-buffer basis with a several-buffer queue. You need to do nothing to get that, it's just the way the underlying system works. Thanks, Bill Gribble > On Jun 20, 2015, at 13:21, mehrdad ghassempoory <ghassempoory@xxxxxxxxx> wrote: > > I want to write a small audio signal processing application. > What I want to do is to successive blocks of N samples, > process them and display the results in real time. > The processing takes a lot more time than sampling interval, > however it can be comfortably done in the time it takes to > collect N samples. That is why I like to have an arrangement > where I can queue two or three buffers for audio input and > process the first full buffer in plenty of time while the audio > software is filling in the next buffer. As soon as I finish > processing the buffer, I could queue it to be filled again. > I would also like use callbacks as much as possible. > > I have tried PORTAUDIO and it does not seem to do multi-buffering > I have tried JACK briefly but it suffers from lack of documentation and > as far as I could gather it had no facilities for this kind of thing. > > I know I could write a higher level interface for PORTAUDIO > to simulate multi-buffering but it means I have to copy input buffer into > intermediate buffers to simulate multi-buffering and apart from > synchronisation problems that I may encounter, it is a solution > that appears very inelegant to me. > > Is there anything out there which can do multi-buffer audio I/O ? > > Any pointers to web pages, advice or admonition is very welcome! > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
