[alsa-devel] Flash Plugin & IO Plug: Async interface not implemented?

Hello,

I'm trying to integrate Firefox Flash plugin with ASLA IO plug driver for proprietary hardware.

I've found out that Flash Plugin ASLA client side (sources could be found at http://labs.adobe.com/wiki/index.php/Flash_Player:Additional_Interface_Suppo...) is incompatible with IO Plug. The reason is that during initialization Flash Plugin calls snd_async_add_pcm_handler() which always return -ENOSYS out of snd_pcm_ioplug_async(). This error causes Flash Plugin ALSA client code to fail.

Is there a good reason why snd_pcm_ioplug_async() unconditionally return -ENOSYS? Is it possible to implement IO Plug async interface?

Thank you for your help, Alexander Indenbaum