On Fri, Apr 24, 2009 at 10:30 AM, maarten van es <maarten.h.van.es@xxxxxxxxx> wrote: > Hi > > Right now I don't have the machine at hand as I'm at work, but I don't > think the sample format is the problem. Like I said, my program works > fine with the hdsp on glibc / alsa. On uclibc / salsa I get the error > setting any hw param, starting with setting the access method to > rw_interleaved, and including setting the sample rate while I switched > the card already to the correct rate with amixer. > Furthermore, if the problem is an unsupported format I wouldn't expect > the error to be "operation not permitted". > I'll try that program anyway when I'm back home to see what it tells me. > > Thanks > Maarten > > On Fri, Apr 24, 2009 at 10:03 AM, Clemens Ladisch <clemens@xxxxxxxxxx> wrote: >> (please don't top-post) >> >> maarten van es wrote: >>> Thanks, but that's not it. I make sure I set the correct sample rate >>> with amixer first. >> >> And what about the sample format? I looked at the drivers; the two >> sound cards do not have a common sample format. >> >> >> Best regards, >> Clemens >> > Thanks, the problem was indeed that I was setting hwparams that are not supported by the card. I do think salsa lib could return a more relevant error than "operation not permitted" and I'll see if I can come up with something for that. Right now though I am trying to figure out what snd_pcm_writen needs for its second parameter, void** bufs. I get the error "bad address" when passing in an array of pointers to a malloc-ed space big enough to hold a channels' worth of data. Sorry if I am missing obvious documentation about this, but what should I pass for this parameter? Regards Maarten _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
