[PATCH 4/9] dsnoop: The delay presented to snd_pcm_status_delay() was incorrect

[Takashi Iwai]

On Mon, 22 Jun 2020 15:15:10 +0200,
Mark Hills wrote:
> 
> This was the original bug that caused me to start looking at the
> ring buffer functions.
> 
> In the API this is documented as:
> 
>   "Delay is distance between current application frame position and
>    sound frame position. It's positive and less than buffer size in
>    normal situation, negative on playback underrun and greater than
>    buffer size on capture overrun. "
> 
> Because dsnoop was returning the buffer space available to the hardware
> the return value was always quite large, and moved in the wrong
> direction.
> 
> With this patch, dsnoop now gives results which are comparable to using
> the "hw" device directly. My test case was with snd-echo3g (Layla3G).
> 
> Signed-off-by: Mark Hills <mark at xwax.org>

Thanks, applied.


Takashi