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Re: TAG feedback on Web Audio

From: Robert O'Callahan <robert@ocallahan.org>
Date: Thu, 8 Aug 2013 22:25:02 +1200
Message-ID: <CAOp6jLZFFoBWA7CPw7twQWtANJnmuKZZuqPL8DXuB=5d7PfxwA@mail.gmail.com>
To: Marcus Geelnard <mage@opera.com>
Cc: Noah Mendelsohn <nrm@arcanedomain.com>, Jer Noble <jer.noble@apple.com>, "K. Gadd" <kg@luminance.org>, Srikumar Karaikudi Subramanian <srikumarks@gmail.com>, Chris Wilson <cwilso@google.com>, Alex Russell <slightlyoff@google.com>, Anne van Kesteren <annevk@annevk.nl>, Olivier Thereaux <Olivier.Thereaux@bbc.co.uk>, "public-audio@w3.org" <public-audio@w3.org>, "www-tag@w3.org List" <www-tag@w3.org>
On Thu, Aug 8, 2013 at 10:16 PM, Marcus Geelnard <mage@opera.com> wrote:

> I strongly believe that the most critical part of the current API that
> could potentially block such future directions is the requirement that the
> audio data buffers must be shared between the audio engine and the JS
> engine. It might seem to be an optimal solution (performance wise) right
> now, but it literally kills many attempts to move audio processing off-CPU
> (e.g. try to imagine the limitations imposed on a hardware accelerated 3D
> graphics processor if it had to be able to observe data mutations made by
> the CPU in shared RAM).
>

I think this is a very good point.

We've had hardware partners ask us if they can use existing DSPs on their
devices to boost Web Audio, so this is a very plausible scenario.

Rob
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Received on Thursday, 8 August 2013 10:25:30 UTC

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