Hello,

I am trying to develop an io plugin to route audio input/output to/from a network application I'm developing. I'm working on openSUSE 10.2, which I think means I'm using ALSA 1.0.13rc2

I am running into two problems:

1. ALSA calls my transfer function with io->nonblock = 0 and seems to be quite picky about the timing of the function. I'm having trouble getting the timing correct, and it seems to be causing ALSA to stop/crash. Is there any way that I can get ALSA to handle the timing for me and call my transfer function with io->nonblock = 1 instead?

2. ALSA seems to require that the capture and playback transfers be synchronized. That seems like a simple enough expectation, but for some reason, I am having a hard time providing this. I tried splitting the capture and playback up in .asoundrc as below, but it doesn't seem to help. (Actually I can't be sure, since it could just be a timing issue). Is there a way to separate the capture from the playback so it won't require them to be synchronized?

Basically, I want the ioplug to have as much latitude as possible to just transfer the data and return as soon as it can. I guess if the calls are non-blocking, then they also won't need to be syncronized. Please correct me if I'm wrong.

.asoundrc: ----------------------------- pcm.read { type myplug }

pcm.write { type myplug }

ctl.myapp { type myplug }

pcm.myapp { type asym playback.pcm "write" capture.pcm "read" }

pcm.!default myapp ------------------------------

Thanks very much Please let me know if I need to clarify anything.

Aryeh Leib Taurog