[alsa-devel] mm functions vs. normal IO
reiner1210 at googlemail.com
Mon Mar 3 23:40:45 CET 2008
I'am new for using ALSA API.
I was astonished that a simple wav playback example does not exist. But
after reading the pcm examples I have managed to make one (if I will
finish it I can post it so it can be added to the examples)
Now my question:
What should be used:
(I think snd_pcm_mmap_writei
is the same with an additional copy behind ?)
I think mmap will have better performance, but will it work with all
soundcards? Or should it be in a config what to use?
I'am also looking for a function to get the number of played frames. I
have played around with "snd_pcm_status" but it seems not to have a
counter for this.
By the way is there a detailed tutorial (introduction) for ALSA
available? The online help is a little bit too short for newbies. ;-)
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