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Re: Seeking guidance on MIDIMessageEvent design, was Fw: [MIDI] bump: Issue 1: MIDIEvent lacking constructor

From: Chris Wilson <cwilso@google.com>
Date: Tue, 16 Apr 2013 09:03:58 -0700
Message-ID: <CAJK2wqXngkMAH=Pnv1pPuZdhF2wBaMMzi6DiMisL79f9250SCA@mail.gmail.com>
To: Anne van Kesteren <annevk@annevk.nl>
Cc: Marcos Caceres <w3c@marcosc.com>, "www-dom@w3.org" <www-dom@w3.org>
Thanks Anne - I'll run the API by public-script-coord.

I'm a bit nervous about using futures rather than a simple callback, but
I'll have a try refactoring using futures and see how it flows - I'll try
it out before sending to script-coord.

Excellent point about domain tracking and ids.  Filed:

Manufacturer, name and version are standard in other MIDI APIs - we could
drop version without much problem, but the user needs to be able to
identify the devices (e.g. to provide a dropdown list of available devices).


On Tue, Apr 16, 2013 at 8:43 AM, Anne van Kesteren <annevk@annevk.nl> wrote:

> On Sun, Apr 14, 2013 at 9:50 PM, Marcos Caceres <w3c@marcosc.com> wrote:
> > Any additional constructive feedback on the design of the API would be
> greatly appreciated.
> >
> > [1] http://webaudio.github.io/web-midi-api/
> It seems requestMIDIAccess should use a future (I know this tune is
> getting old quickly, but it's true!)
> You need to state how MIDIPort.id is scoped (prolly to origin, no?)
> and you should state that it should not be the same across origins. We
> don't want to make it easy to track users using these new identifiers.
> Furthermore, once the user clears cookies these MIDIPort.id thingies
> need to be regenerated too. (I gave similar feedback to the WebRTC
> guys.)
> Is there a reason to expose manufacturer, name, and version? It would
> be helpful to point those out, but maybe starting without them would
> be even better.
> I'm not entirely sure, but you might have to overload sequence<octet>
> with ArrayBuffer as using the former also for the latter might have
> observable side effects while you actually would want to optimize that
> case. (Not a 100% sure though.)
> I suggest you put this by public-script-coord@w3.org to see if anyone
> there has review comments. (If you do that please do it as a fresh
> email that introduces the API.)
> --
> http://annevankesteren.nl/
Received on Tuesday, 16 April 2013 16:04:26 UTC

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