<Sound Dev> WASAPI

[Izmar Verhage]

Hi Sergey,

My hope is to get lower latency audio. However, after reading up on
DirectSound and WASAPI(shared) I'm becoming skeptical that this is
possible, due to both going through a Windows software mixer before going
to the hardware, which is an impediment to low latency audio.

I'll try to write some tests in C/C++ to measure performance of DirectSound
vs WASAPI(shared).

On Thu, Feb 13, 2020 at 9:06 AM Sergey Bylokhov <Sergey.Bylokhov at oracle.com>
wrote:

> Hi Izmar,
>
> You are very welcome to the OpenJDK team! And thank you for sharing your
> ideas on how to improve JavaSound. Before you start, could you tell us more
> about WASAPI(shared)? What are the advantages over DirectSound? I am not
> sure we can use WASAPI(exclusive) and block everything else on the system.
>
> On 2/9/20 12:32 am, Izmar Verhage wrote:
> > I recently joined OpenJDK after concluding that the Java Sound API seems
> to have no way to speak WASAPI. In the OpenJDK sources that I checked I was
> only able to find PLATFORM_API_WinOS_DirectSound.cpp and no WASAPI variant
> of a similar file.
> >
> > To my knowledge WASAPI should give us much lower latency than
> DirectSound, regardless of whether shared or exclusive WASAPI mode is used.
> >
> > Additionally DirectSound has been deprecated for quite some time.
> >
> > If the only impediment to have WASAPI is that someone should build it, I
> would like to work on this.
>
>
> --
> Best regards, Sergey.
>
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