[alsa-devel] [alsa-lib][PATCH v4] ctl: add test program for control element set

[Takashi Iwai]

On Fri, 17 Jun 2016 14:26:42 +0200,
Takashi Sakamoto wrote:
> 
> The feature of control element set has been abandoned for a long time since
> firstly introduced in 2003. Furthermore, there's few applications to utilize
> this feature. These situations bring a hard work to persons who need the
> feature. Especially, a lack of test program make it harder to fix much bugs
> in this feature.
> 
> This commit adds a test program as a sample of the feature. This program
> adds element sets of each element type to 'hw:0' in this order; boolean,
> integer, enumerated, bytes, IEC958 and integer64. Each iteration includes
> below scheme:
> 
> 1. add an element set with 900 elements. Each of them has maximum number
>    of members allowed by ALSA ctl core.
> 2. check all of events generated by above operation.
> 3. retrieve information of each element, then validate it.
> 4. unlock each member of all elements because they're initially locked.
> 5. write to all of members in all elements and read.
> 6. check all of events generated by above operation.
> 7. write information for threshold level to the element set and read it.
> 8. check all of events generated by above operation.
> 9. remove the element set.
> 10.check all of events generated by above operation.
> 
> When any of these operations fail, it means regression occurs. Then, added
> elements still remain in a certain sound card. In this case, unloading
> drivers corresponding to the card is an easy way to recover.
> 
> Besides, this program doesn't perform below element operations of ALSA ctl
> feature:
>  - list
>  - lock
>  - replace
> 
> Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>

Applied, thanks.


Takashi