Subject: Re: VIDC audio
To: None <crok@crok.demon.co.uk>
From: Richard Earnshaw <rearnsha@arm.com>
List: port-arm32
Date: 11/01/1999 11:20:14
> Just a simple question- how can I get sound to work under NetBSD 1.4.1 using
> the VIDC?  I have tried compiling vidcaudio.c but that seems not to work, 
> even with all the kernel sources etc.
> 

Simple answer is that you probably can't unless you have 8-bit audio 
fitted and even then you will probably struggle since there are no filters 
to convert the standard formats to the 'interesting' mu-law format that 
vidc uses.  I have a driver for 16-bit nearly working, but it still clips 
the end of the audio stream and contains a large amount of DMA code that 
really should be punted to a generic IOMD bus-dma implementation.  
Something I keep intending to work on in my copious free time...

Incidentally, a generic IOMD bus-dma implementation would form the basis 
for dma to podules and the internal hard disk interface as well, so would 
be a really Good Thing (tm).

R.