28 Jul
2011
28 Jul
'11
4:52 p.m.
Nikita V. Youshchenko wrote:
Thanks for your reply. Will ask there now.
Soon I will work on a linux kernel driver for a
custom audio decoder
device that is being developed by a company I work for.
Kernel sound programming would be discussed on the alsa-devel list. If not going into details, that devices reads
A52-encoded stream
from system memory, and writes raw pcm stream to system memory.
Simplest thing to do is - implement a character device, where
user-space will write encoded stream, and from where user-space will
read decoded stream.
However, perhaps a better architecture (e.g. in-kernel intergation
with an audio sink) is possible?
One of the implicit assumptions of ALSA sound devices is that they run
in real time, and at a constant bit rate. As far as I can tell, your
device would be 'just' a DSP, so a character device would be
appropriate.