[alsa-devel] about ioctl calls

Lorenzo Fundaró lfundaro at etu.utc.fr
Thu May 26 12:07:02 CEST 2011

Hi folks,

I have a program that constantly make ioctl calls like this:

ioctl(4, 0x4122, 0x8b703)
ioctl(4, 0x4122, 0xbfb65768)

I suspect that this call pertains to ALSA, since I have straced other
programs that play music and they always use in the ioctl request field the
0x4122 code.
I am interested on finding out what's in the third argument of the ioctl
is it a sort of struct that contains the audio samples ?

Thanks in advance,

Lorenzo Fundaró García
Université de Technologie de Compiègne
Génie Informatique

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