ioctl(fd, SNDRV_CTL_IOCTL_ELEM_REPLACE, ... not working from userspace ?

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Hi,

I try to rename existing sound control from userspace. The goal is to create a generic abstraction layer for AutomotiveGradeLinux audio server

While I found two hidden methods to access to low level functionalities from user space, non of them seems to accecp replace call.

I isolated the code in two basic samples https://github.com/fulup-bzh/alsa-ctl-replace

 - First one uses a directt IOTCL model

 - Second one leverage private sndctl control handle.

Any idea would be more than welcome.

Fulup


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