I've been using ocaml-portaudio for some pitch-detection software I'm working on. I noticed that some functionality was missing and decided to add it in. Specifically I've been working on: different formats, callbacks and using Bigarrays.
I don't know how useful callbacks are - if the execution of the callback takes too long portaudio will silently fail (pun intended). On my machine (an EeePC 1000H) the callback couldn't handle much more than a Bigarray.blit. Generating random noise, for example, would cause the thread to terminate execution after a few seconds. This also requires OCaml 3.12 and the use of threads. The other significant change I've made is switching to Bigarrays. This results in far less copying of data and allows for almost seamless use of non-interleaved arrays. I have noticed that Liquid Soap uses float array arrays extensively and that Bigarrays will break compatibility. While I have currently rewritten the read and write functions to use Bigarrays I can easily support both in order to not break compatibility. However this leads me to wonder (and forgive me if this is an ignorant question, I don't use Liquid Soap and only briefly looked through the source) why float array arrays are used over Bigarrays given that Bigarrays are compatible with C. My code can be found on github: https://github.com/aplusbi/ocaml-portaudio Some functionality is still missing or untested, but please let me know if any of this work is of use to Savonet. Thanks, Niki Yoshiuchi ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Savonet-devl mailing list Savonet-devl@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/savonet-devl
