29 Nov
2009
29 Nov
'09
5:50 p.m.
When opening an AC'97 codec under ALSA using snd_ac97_pcm_open(), specifying the number of channels desired (2, 4 or 6) is there a way to read back which slots will be in use?
Currently, in the AACI driver, I use a lookup table to convert from channels to a slot mask - if this information is already available from ALSA, I'd much rather use it rather than inventing keeping my own solution.
Also, should the 'slots' value passed to snd_ac97_pcm_open() be those in pcm->r[].slots or should it be selected from the number of channels?