[xine-user] Re: audio_oss.c improvement for cmedia 8738 6-channel detection

[<th...@kl...>]

Ooops,

forgot to mention some important details:

xine_lib version : 0.9.13
cmpci    revision: 5.64
kernel   version : 2.4.19

Hope this covers all ;-)
T

> Hi all,
>
> After having played with my cmedia 6 channel card with a 5.1 creative
> box-set I detected that xine could not detect the capabilities of the
> soundcard. Other programs like Mplayer and a52dec had no problems at
> all. So this I could not handle, as Xine is my most favourit player
> under linux, so I started to try to find the reason, and I found it ;-)
> The current cmpci oss driver only supports more than one speaker if it
> is setup into 16 bit output mode. In the xine detection routine of the
> audio_oss driver xine tries to detect whether or not the sound card is
> able to do 8 bit output, and it does. But as this detection results in
> the cmpci driver to setting the sound card into 8-bit mode, it refuses
> in this mode to say that it is capable of doing more than stereo output
> (this is probably correct, I did not check the datasheets of the chip
> on it). Due to this fact xine cannot detect that the cmedia card is
> capable of doing 4 , 5 or even 5.1 channels. The sollution to this is
> quite simple, after detecting the 8-bit mode, just put the card back
> into the 16-bit mode, and start detecting the output capabilities of
> the card.
> Now my favorit player is able to output real 5.1 to my nice speakers
> ;-)))) Attached I have the diff between the old and the new audio_oss.c
> file. Have fun playing with your cmedia card in real 5.1 sound under
> xine (I have tested several DVD's and it works perfectly all the time)
>
> Rgds,
> Theo
>
> P.s. Keep up the good work