[LAD] ALSA FLoat sample format
viceic at net2000.ch
Thu Aug 16 08:19:54 UTC 2007
Thanks for your reply. In my code I check if I'm on big or little endian
machine in order to append _BE or _LE.
I have already tried with SND_PCM_FORMAT_FLOAT (CPU endian) and the problem
Le Thursday 16 August 2007 09.52:20 Erik de Castro Lopo, vous avez écrit :
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> Predrag Viceic wrote:
> > For some unknown reason, I seem to be unable to set SND_PCM_FORMAT_FLOAT
> > format flag when initialising alsa driver. This happens with my both
> > cards (on is the laptops AC'97 Audio Controller and the other a similar
> > onboard cart)
> > This line used to work with alsa 0.9 but return an "Invalid argument"
> > error with alsa 1.0.14a :
> > snd_pcm_hw_params_set_format(alsa_pcm_handle, alsa_hwparams,
> > SND_PCM_FORMAT_FLOAT_LE)
> You probably want SND_PCM_FORMAT_FLOAT (without the _LE at the end)
> to specify CPU native float. Using SND_PCM_FORMAT_FLOAT_LE will mean
> that your code is almost certain not correct for big endian CPUS.
> > Example code at lines 1031-1041 :
> > http://cvs.savannah.nongnu.org/viewvc/freecycle/src/soundplayer.cpp?annot
> That should probably be fixed as well.
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